/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.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:45:23,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:45:23,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:45:23,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:45:23,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:45:23,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:45:23,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:45:23,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:45:23,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:45:23,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:45:23,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:45:23,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:45:23,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:45:23,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:45:23,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:45:23,461 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:45:23,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:45:23,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:45:23,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:45:23,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:45:23,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:45:23,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:45:23,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:45:23,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:45:23,497 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:45:23,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:45:23,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:45:23,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:45:23,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:45:23,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:45:23,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:45:23,510 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:45:23,511 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:45:23,512 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:45:23,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:45:23,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:45:23,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:45:23,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:45:23,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:45:23,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:45:23,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:45:23,518 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 20:45:23,545 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:45:23,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:45:23,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:45:23,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:45:23,548 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:45:23,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:45:23,548 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:45:23,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:45:23,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:45:23,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:45:23,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:45:23,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:45:23,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:45:23,550 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:45:23,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:45:23,550 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:45:23,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:45:23,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:45:23,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:45:23,551 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:45:23,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:45:23,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:45:23,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:45:23,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:45:23,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:45:23,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:45:23,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:45:23,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:45:23,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:45:23,553 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 20:45:24,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:45:24,030 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:45:24,034 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:45:24,036 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:45:24,037 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:45:24,038 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 20:45:24,120 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff55e45f1/39563de0934a4400b2bd1528f81fb11f/FLAGb37f50444 [2020-09-24 20:45:24,794 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:45:24,795 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 20:45:24,811 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff55e45f1/39563de0934a4400b2bd1528f81fb11f/FLAGb37f50444 [2020-09-24 20:45:25,008 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff55e45f1/39563de0934a4400b2bd1528f81fb11f [2020-09-24 20:45:25,021 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:45:25,028 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:45:25,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:45:25,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:45:25,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:45:25,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:45:25" (1/1) ... [2020-09-24 20:45:25,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75d3615b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:25, skipping insertion in model container [2020-09-24 20:45:25,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:45:25" (1/1) ... [2020-09-24 20:45:25,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:45:25,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:45:25,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:45:25,765 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:45:25,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:45:25,982 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:45:25,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:25 WrapperNode [2020-09-24 20:45:25,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:45:25,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:45:25,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:45:25,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:45:25,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:25" (1/1) ... [2020-09-24 20:45:25,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:25" (1/1) ... [2020-09-24 20:45:26,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:25" (1/1) ... [2020-09-24 20:45:26,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:25" (1/1) ... [2020-09-24 20:45:26,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:25" (1/1) ... [2020-09-24 20:45:26,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:25" (1/1) ... [2020-09-24 20:45:26,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:25" (1/1) ... [2020-09-24 20:45:26,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:45:26,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:45:26,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:45:26,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:45:26,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:25" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:45:26,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:45:26,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:45:26,191 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 20:45:26,191 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:45:26,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:45:26,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 20:45:26,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-24 20:45:26,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 20:45:26,194 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 20:45:26,194 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 20:45:26,194 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 20:45:26,195 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 20:45:26,195 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 20:45:26,195 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 20:45:26,195 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 20:45:26,196 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 20:45:26,196 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 20:45:26,197 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 20:45:26,197 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:45:26,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:45:26,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:45:27,986 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:45:27,986 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 20:45:27,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:45:27 BoogieIcfgContainer [2020-09-24 20:45:27,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:45:28,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:45:28,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:45:28,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:45:28,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:45:25" (1/3) ... [2020-09-24 20:45:28,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71981fc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:45:28, skipping insertion in model container [2020-09-24 20:45:28,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:25" (2/3) ... [2020-09-24 20:45:28,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71981fc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:45:28, skipping insertion in model container [2020-09-24 20:45:28,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:45:27" (3/3) ... [2020-09-24 20:45:28,010 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 20:45:28,025 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:45:28,037 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:45:28,060 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:45:28,094 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:45:28,094 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:45:28,095 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:45:28,095 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:45:28,095 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:45:28,095 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:45:28,095 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:45:28,096 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:45:28,147 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states. [2020-09-24 20:45:28,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-24 20:45:28,186 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:45:28,188 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] [2020-09-24 20:45:28,189 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:45:28,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:45:28,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1632941541, now seen corresponding path program 1 times [2020-09-24 20:45:28,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:45:28,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777369727] [2020-09-24 20:45:28,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:45:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:29,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:29,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:29,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:29,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:29,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:30,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:30,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:33,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:33,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:33,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:45:33,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-24 20:45:33,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 20:45:33,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5125 [2020-09-24 20:45:33,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:45:33,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:45:33,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 172 [2020-09-24 20:45:33,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-09-24 20:45:33,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:45:34,615 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 20:45:34,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:45:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:34,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:34,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:45:34,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 20:45:34,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:45:34,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-24 20:45:34,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:45:34,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:45:34,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:45:34,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:45:34,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:45:35,107 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 20:45:35,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777369727] [2020-09-24 20:45:35,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:45:35,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:45:35,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252532481] [2020-09-24 20:45:35,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:45:35,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:45:35,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:45:35,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:45:35,162 INFO L87 Difference]: Start difference. First operand 903 states. Second operand 5 states. [2020-09-24 20:45:41,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:45:41,784 INFO L93 Difference]: Finished difference Result 2146 states and 2822 transitions. [2020-09-24 20:45:41,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 20:45:41,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 449 [2020-09-24 20:45:41,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:45:41,825 INFO L225 Difference]: With dead ends: 2146 [2020-09-24 20:45:41,825 INFO L226 Difference]: Without dead ends: 1397 [2020-09-24 20:45:41,833 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 [2020-09-24 20:45:41,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2020-09-24 20:45:41,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1395. [2020-09-24 20:45:41,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1395 states. [2020-09-24 20:45:42,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 1698 transitions. [2020-09-24 20:45:42,008 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 1698 transitions. Word has length 449 [2020-09-24 20:45:42,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:45:42,014 INFO L479 AbstractCegarLoop]: Abstraction has 1395 states and 1698 transitions. [2020-09-24 20:45:42,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:45:42,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 1698 transitions. [2020-09-24 20:45:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-09-24 20:45:42,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:45:42,034 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] [2020-09-24 20:45:42,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:45:42,035 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:45:42,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:45:42,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1305635446, now seen corresponding path program 1 times [2020-09-24 20:45:42,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:45:42,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268323181] [2020-09-24 20:45:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:45:42,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:42,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:42,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:42,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:42,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:42,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:43,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:43,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:45,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:46,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:47,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:45:47,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 457 [2020-09-24 20:45:47,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 20:45:47,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-24 20:45:47,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:45:47,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:45:47,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 167 [2020-09-24 20:45:47,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-09-24 20:45:47,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:45:47,541 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 20:45:47,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:45:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:47,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:47,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:45:47,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 20:45:47,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:45:47,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-24 20:45:47,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:45:47,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:45:47,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:45:47,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:45:47,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:45:47,967 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 20:45:47,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268323181] [2020-09-24 20:45:47,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:45:47,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:45:47,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481536729] [2020-09-24 20:45:47,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:45:47,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:45:47,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:45:47,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:45:47,974 INFO L87 Difference]: Start difference. First operand 1395 states and 1698 transitions. Second operand 5 states. [2020-09-24 20:45:52,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:45:52,940 INFO L93 Difference]: Finished difference Result 3678 states and 4524 transitions. [2020-09-24 20:45:52,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 20:45:52,941 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 450 [2020-09-24 20:45:52,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:45:52,956 INFO L225 Difference]: With dead ends: 3678 [2020-09-24 20:45:52,956 INFO L226 Difference]: Without dead ends: 2530 [2020-09-24 20:45:52,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:45:52,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2020-09-24 20:45:53,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2528. [2020-09-24 20:45:53,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2528 states. [2020-09-24 20:45:53,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 3090 transitions. [2020-09-24 20:45:53,079 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 3090 transitions. Word has length 450 [2020-09-24 20:45:53,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:45:53,081 INFO L479 AbstractCegarLoop]: Abstraction has 2528 states and 3090 transitions. [2020-09-24 20:45:53,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:45:53,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 3090 transitions. [2020-09-24 20:45:53,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-09-24 20:45:53,092 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:45:53,092 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] [2020-09-24 20:45:53,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:45:53,093 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:45:53,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:45:53,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1300639517, now seen corresponding path program 1 times [2020-09-24 20:45:53,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:45:53,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364388046] [2020-09-24 20:45:53,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:45:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:53,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:53,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:53,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:53,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:53,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:53,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:54,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:55,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:57,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:58,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:45:58,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 458 [2020-09-24 20:45:58,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 20:45:58,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-09-24 20:45:58,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:45:58,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:45:58,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-09-24 20:45:58,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 20:45:58,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:45:58,634 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 20:45:58,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:45:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:58,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:58,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:45:58,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 20:45:58,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:45:58,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 20:45:58,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:45:58,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:45:58,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:45:58,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:45:58,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:45:58,867 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 20:45:58,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364388046] [2020-09-24 20:45:58,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:45:58,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:45:58,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447357348] [2020-09-24 20:45:58,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:45:58,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:45:58,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:45:58,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:45:58,870 INFO L87 Difference]: Start difference. First operand 2528 states and 3090 transitions. Second operand 5 states. [2020-09-24 20:46:04,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:46:04,081 INFO L93 Difference]: Finished difference Result 6951 states and 8530 transitions. [2020-09-24 20:46:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 20:46:04,082 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 451 [2020-09-24 20:46:04,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:46:04,103 INFO L225 Difference]: With dead ends: 6951 [2020-09-24 20:46:04,103 INFO L226 Difference]: Without dead ends: 4677 [2020-09-24 20:46:04,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:46:04,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4677 states. [2020-09-24 20:46:04,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4677 to 4675. [2020-09-24 20:46:04,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4675 states. [2020-09-24 20:46:04,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4675 states to 4675 states and 5700 transitions. [2020-09-24 20:46:04,351 INFO L78 Accepts]: Start accepts. Automaton has 4675 states and 5700 transitions. Word has length 451 [2020-09-24 20:46:04,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:46:04,352 INFO L479 AbstractCegarLoop]: Abstraction has 4675 states and 5700 transitions. [2020-09-24 20:46:04,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:46:04,352 INFO L276 IsEmpty]: Start isEmpty. Operand 4675 states and 5700 transitions. [2020-09-24 20:46:04,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2020-09-24 20:46:04,364 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:46:04,366 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] [2020-09-24 20:46:04,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:46:04,372 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:46:04,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:46:04,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1192040972, now seen corresponding path program 1 times [2020-09-24 20:46:04,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:46:04,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185050241] [2020-09-24 20:46:04,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:46:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:46:04,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:04,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:04,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:04,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:05,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:05,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:06,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:06,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:09,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:46:09,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 459 [2020-09-24 20:46:09,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 20:46:09,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-09-24 20:46:09,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:46:09,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:46:09,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-09-24 20:46:09,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-09-24 20:46:09,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:46:09,899 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-24 20:46:09,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:46:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:46:09,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:09,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:46:09,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 20:46:09,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:46:09,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-24 20:46:09,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:46:09,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:46:09,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:46:09,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:46:09,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:46:10,178 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 20:46:10,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185050241] [2020-09-24 20:46:10,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:46:10,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:46:10,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208289851] [2020-09-24 20:46:10,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:46:10,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:46:10,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:46:10,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:46:10,181 INFO L87 Difference]: Start difference. First operand 4675 states and 5700 transitions. Second operand 5 states.