/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=NARROWEST --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 [2020-09-25 02:22:33,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:22:33,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:22:33,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:22:33,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:22:33,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:22:33,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:22:33,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:22:33,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:22:33,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:22:33,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:22:33,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:22:33,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:22:33,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:22:33,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:22:33,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:22:33,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:22:33,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:22:33,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:22:33,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:22:33,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:22:33,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:22:33,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:22:33,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:22:33,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:22:33,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:22:33,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:22:33,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:22:33,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:22:33,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:22:33,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:22:33,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:22:33,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:22:33,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:22:33,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:22:33,254 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:22:33,255 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:22:33,255 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:22:33,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:22:33,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:22:33,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:22:33,258 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 02:22:33,284 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:22:33,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:22:33,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:22:33,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:22:33,286 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:22:33,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:22:33,286 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:22:33,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:22:33,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:22:33,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:22:33,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:22:33,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:22:33,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:22:33,288 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:22:33,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:22:33,288 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:22:33,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:22:33,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:22:33,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:22:33,289 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:22:33,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:22:33,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:22:33,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:22:33,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:22:33,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:22:33,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:22:33,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:22:33,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:22:33,291 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:22:33,291 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true; [2020-09-25 02:22:33,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:22:33,776 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:22:33,780 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:22:33,782 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:22:33,784 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:22:33,785 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 02:22:33,860 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa3307fc3/cd1dfc14399a43d6ae75733381a7266b/FLAG8d7c0b723 [2020-09-25 02:22:34,475 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:22:34,476 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 02:22:34,497 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa3307fc3/cd1dfc14399a43d6ae75733381a7266b/FLAG8d7c0b723 [2020-09-25 02:22:34,744 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa3307fc3/cd1dfc14399a43d6ae75733381a7266b [2020-09-25 02:22:34,760 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:22:34,768 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:22:34,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:22:34,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:22:34,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:22:34,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:22:34" (1/1) ... [2020-09-25 02:22:34,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1911956 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:34, skipping insertion in model container [2020-09-25 02:22:34,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:22:34" (1/1) ... [2020-09-25 02:22:34,793 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:22:34,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:22:35,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:22:35,493 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:22:35,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:22:35,687 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:22:35,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:35 WrapperNode [2020-09-25 02:22:35,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:22:35,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:22:35,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:22:35,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:22:35,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:35" (1/1) ... [2020-09-25 02:22:35,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:35" (1/1) ... [2020-09-25 02:22:35,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:35" (1/1) ... [2020-09-25 02:22:35,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:35" (1/1) ... [2020-09-25 02:22:35,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:35" (1/1) ... [2020-09-25 02:22:35,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:35" (1/1) ... [2020-09-25 02:22:35,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:35" (1/1) ... [2020-09-25 02:22:35,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:22:35,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:22:35,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:22:35,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:22:35,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:35" (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 02:22:35,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:22:35,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:22:35,883 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 02:22:35,883 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:22:35,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:22:35,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 02:22:35,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 02:22:35,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 02:22:35,885 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 02:22:35,886 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 02:22:35,886 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 02:22:35,886 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 02:22:35,886 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 02:22:35,886 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 02:22:35,886 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 02:22:35,887 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 02:22:35,888 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 02:22:35,888 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 02:22:35,888 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:22:35,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:22:35,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:22:37,618 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:22:37,618 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 02:22:37,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:22:37 BoogieIcfgContainer [2020-09-25 02:22:37,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:22:37,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:22:37,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:22:37,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:22:37,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:22:34" (1/3) ... [2020-09-25 02:22:37,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d99c0de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:22:37, skipping insertion in model container [2020-09-25 02:22:37,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:22:35" (2/3) ... [2020-09-25 02:22:37,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d99c0de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:22:37, skipping insertion in model container [2020-09-25 02:22:37,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:22:37" (3/3) ... [2020-09-25 02:22:37,647 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 02:22:37,659 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:22:37,678 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:22:37,701 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:22:37,743 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:22:37,743 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:22:37,743 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:22:37,744 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:22:37,744 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:22:37,744 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:22:37,744 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:22:37,744 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:22:37,784 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states. [2020-09-25 02:22:37,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-09-25 02:22:37,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:22:37,823 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] [2020-09-25 02:22:37,824 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:22:37,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:22:37,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1632941541, now seen corresponding path program 1 times [2020-09-25 02:22:37,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:22:37,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794193072] [2020-09-25 02:22:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:22:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:22:38,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:39,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:39,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:39,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:39,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:39,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:40,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:42,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:42,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:43,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:22:43,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 456 [2020-09-25 02:22:43,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 02:22:43,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-09-25 02:22:43,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:22:43,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 02:22:43,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-09-25 02:22:43,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-25 02:22:43,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 02:22:44,235 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 02:22:44,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:22:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:22:44,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:44,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:22:44,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 02:22:44,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:22:44,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-25 02:22:44,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:22:44,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:22:44,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:22:44,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:22:44,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:22:44,690 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 02:22:44,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794193072] [2020-09-25 02:22:44,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:22:44,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 02:22:44,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930049985] [2020-09-25 02:22:44,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 02:22:44,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:22:44,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 02:22:44,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:22:44,731 INFO L87 Difference]: Start difference. First operand 903 states. Second operand 5 states. [2020-09-25 02:22:50,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:22:50,992 INFO L93 Difference]: Finished difference Result 2299 states and 3037 transitions. [2020-09-25 02:22:50,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 02:22:50,995 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 449 [2020-09-25 02:22:50,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:22:51,032 INFO L225 Difference]: With dead ends: 2299 [2020-09-25 02:22:51,032 INFO L226 Difference]: Without dead ends: 1398 [2020-09-25 02:22:51,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:22:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2020-09-25 02:22:51,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1396. [2020-09-25 02:22:51,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1396 states. [2020-09-25 02:22:51,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 1699 transitions. [2020-09-25 02:22:51,194 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 1699 transitions. Word has length 449 [2020-09-25 02:22:51,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:22:51,196 INFO L479 AbstractCegarLoop]: Abstraction has 1396 states and 1699 transitions. [2020-09-25 02:22:51,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 02:22:51,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 1699 transitions. [2020-09-25 02:22:51,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-09-25 02:22:51,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:22:51,210 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] [2020-09-25 02:22:51,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:22:51,211 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:22:51,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:22:51,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1770157282, now seen corresponding path program 1 times [2020-09-25 02:22:51,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:22:51,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046703392] [2020-09-25 02:22:51,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:22:51,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:22:51,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:51,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:51,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:51,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:51,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:52,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:52,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:54,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:55,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:56,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:22:56,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 457 [2020-09-25 02:22:56,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 02:22:56,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-25 02:22:56,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:22:56,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 02:22:56,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 173 [2020-09-25 02:22:56,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 02:22:56,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:22:56,588 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 02:22:56,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:22:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:22:56,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:22:56,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:22:56,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 02:22:56,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:22:56,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-25 02:22:56,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:22:56,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:22:56,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:22:56,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:22:56,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:22:57,024 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 02:22:57,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046703392] [2020-09-25 02:22:57,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:22:57,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 02:22:57,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317285145] [2020-09-25 02:22:57,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 02:22:57,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:22:57,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 02:22:57,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:22:57,030 INFO L87 Difference]: Start difference. First operand 1396 states and 1699 transitions. Second operand 4 states. [2020-09-25 02:23:00,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:23:00,083 INFO L93 Difference]: Finished difference Result 3803 states and 4691 transitions. [2020-09-25 02:23:00,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 02:23:00,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 450 [2020-09-25 02:23:00,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:23:00,099 INFO L225 Difference]: With dead ends: 3803 [2020-09-25 02:23:00,099 INFO L226 Difference]: Without dead ends: 2608 [2020-09-25 02:23:00,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:23:00,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2020-09-25 02:23:00,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1399. [2020-09-25 02:23:00,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1399 states. [2020-09-25 02:23:00,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 1703 transitions. [2020-09-25 02:23:00,174 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 1703 transitions. Word has length 450 [2020-09-25 02:23:00,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:23:00,175 INFO L479 AbstractCegarLoop]: Abstraction has 1399 states and 1703 transitions. [2020-09-25 02:23:00,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 02:23:00,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 1703 transitions. [2020-09-25 02:23:00,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-09-25 02:23:00,180 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:23:00,181 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] [2020-09-25 02:23:00,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:23:00,181 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:23:00,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:23:00,182 INFO L82 PathProgramCache]: Analyzing trace with hash 139931048, now seen corresponding path program 1 times [2020-09-25 02:23:00,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:23:00,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082641739] [2020-09-25 02:23:00,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:23:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:23:00,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:00,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:00,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:00,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:00,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:01,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:01,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:01,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:02,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:05,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:23:05,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 458 [2020-09-25 02:23:05,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 02:23:05,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 02:23:05,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:23:05,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 02:23:05,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 170 [2020-09-25 02:23:05,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 02:23:05,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:23:05,654 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 02:23:05,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:23:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:23:05,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:05,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:23:05,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 02:23:05,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:23:05,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-25 02:23:05,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:23:05,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:23:05,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:23:05,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:23:05,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:23:05,979 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 02:23:05,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082641739] [2020-09-25 02:23:05,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:23:05,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 02:23:05,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507451933] [2020-09-25 02:23:05,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 02:23:05,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:23:05,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 02:23:05,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:23:05,983 INFO L87 Difference]: Start difference. First operand 1399 states and 1703 transitions. Second operand 5 states. [2020-09-25 02:23:09,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:23:09,152 INFO L93 Difference]: Finished difference Result 3787 states and 4670 transitions. [2020-09-25 02:23:09,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 02:23:09,152 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 451 [2020-09-25 02:23:09,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:23:09,164 INFO L225 Difference]: With dead ends: 3787 [2020-09-25 02:23:09,164 INFO L226 Difference]: Without dead ends: 2589 [2020-09-25 02:23:09,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:23:09,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2020-09-25 02:23:09,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 1411. [2020-09-25 02:23:09,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1411 states. [2020-09-25 02:23:09,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 1717 transitions. [2020-09-25 02:23:09,230 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 1717 transitions. Word has length 451 [2020-09-25 02:23:09,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:23:09,230 INFO L479 AbstractCegarLoop]: Abstraction has 1411 states and 1717 transitions. [2020-09-25 02:23:09,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 02:23:09,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 1717 transitions. [2020-09-25 02:23:09,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-09-25 02:23:09,235 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:23:09,235 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] [2020-09-25 02:23:09,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:23:09,236 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:23:09,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:23:09,237 INFO L82 PathProgramCache]: Analyzing trace with hash -2070246104, now seen corresponding path program 1 times [2020-09-25 02:23:09,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:23:09,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200331169] [2020-09-25 02:23:09,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:23:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:23:09,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:09,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:09,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:09,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:09,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:09,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:10,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:10,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:11,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:14,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:23:14,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 458 [2020-09-25 02:23:14,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 02:23:14,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-25 02:23:14,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:23:14,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 02:23:14,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 178 [2020-09-25 02:23:14,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-09-25 02:23:14,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:23:14,665 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-09-25 02:23:14,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:23:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:23:14,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:14,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:23:14,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 02:23:14,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:23:14,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-25 02:23:14,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:23:14,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:23:14,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:23:14,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:23:14,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:23:14,910 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 02:23:14,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200331169] [2020-09-25 02:23:14,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:23:14,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 02:23:14,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798466909] [2020-09-25 02:23:14,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 02:23:14,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:23:14,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 02:23:14,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:23:14,913 INFO L87 Difference]: Start difference. First operand 1411 states and 1717 transitions. Second operand 4 states. [2020-09-25 02:23:19,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:23:19,630 INFO L93 Difference]: Finished difference Result 3538 states and 4357 transitions. [2020-09-25 02:23:19,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 02:23:19,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 451 [2020-09-25 02:23:19,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:23:19,642 INFO L225 Difference]: With dead ends: 3538 [2020-09-25 02:23:19,643 INFO L226 Difference]: Without dead ends: 2551 [2020-09-25 02:23:19,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:23:19,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2020-09-25 02:23:19,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2549. [2020-09-25 02:23:19,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2549 states. [2020-09-25 02:23:19,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2549 states to 2549 states and 3114 transitions. [2020-09-25 02:23:19,740 INFO L78 Accepts]: Start accepts. Automaton has 2549 states and 3114 transitions. Word has length 451 [2020-09-25 02:23:19,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:23:19,741 INFO L479 AbstractCegarLoop]: Abstraction has 2549 states and 3114 transitions. [2020-09-25 02:23:19,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 02:23:19,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2549 states and 3114 transitions. [2020-09-25 02:23:19,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-09-25 02:23:19,747 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:23:19,748 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] [2020-09-25 02:23:19,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 02:23:19,748 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:23:19,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:23:19,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1775153211, now seen corresponding path program 1 times [2020-09-25 02:23:19,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:23:19,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794015519] [2020-09-25 02:23:19,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:23:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:23:19,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:20,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:20,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:20,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:20,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:20,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:21,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:23:22,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking...