/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.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:45:35,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:45:35,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:45:35,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:45:35,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:45:35,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:45:35,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:45:35,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:45:35,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:45:35,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:45:35,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:45:35,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:45:35,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:45:35,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:45:35,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:45:35,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:45:35,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:45:35,865 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:45:35,867 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:45:35,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:45:35,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:45:35,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:45:35,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:45:35,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:45:35,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:45:35,896 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:45:35,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:45:35,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:45:35,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:45:35,904 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:45:35,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:45:35,906 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:45:35,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:45:35,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:45:35,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:45:35,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:45:35,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:45:35,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:45:35,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:45:35,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:45:35,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:45:35,921 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 20:45:35,966 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:45:35,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:45:35,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:45:35,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:45:35,969 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:45:35,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:45:35,970 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:45:35,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:45:35,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:45:35,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:45:35,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:45:35,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:45:35,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:45:35,973 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:45:35,973 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:45:35,973 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:45:35,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:45:35,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:45:35,974 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:45:35,974 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:45:35,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:45:35,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:45:35,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:45:35,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:45:35,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:45:35,975 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:45:35,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:45:35,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:45:35,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:45:35,976 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 20:45:36,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:45:36,444 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:45:36,448 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:45:36,450 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:45:36,451 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:45:36,452 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 20:45:36,555 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a28cde82/485ebef4788b411f9772e5307b46226e/FLAG903327ad9 [2020-09-24 20:45:37,302 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:45:37,303 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 20:45:37,334 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a28cde82/485ebef4788b411f9772e5307b46226e/FLAG903327ad9 [2020-09-24 20:45:37,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a28cde82/485ebef4788b411f9772e5307b46226e [2020-09-24 20:45:37,494 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:45:37,501 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:45:37,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:45:37,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:45:37,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:45:37,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:45:37" (1/1) ... [2020-09-24 20:45:37,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@255d8a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:37, skipping insertion in model container [2020-09-24 20:45:37,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:45:37" (1/1) ... [2020-09-24 20:45:37,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:45:37,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:45:38,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:45:38,672 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:45:39,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:45:39,213 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:45:39,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:39 WrapperNode [2020-09-24 20:45:39,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:45:39,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:45:39,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:45:39,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:45:39,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:39" (1/1) ... [2020-09-24 20:45:39,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:39" (1/1) ... [2020-09-24 20:45:39,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:39" (1/1) ... [2020-09-24 20:45:39,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:39" (1/1) ... [2020-09-24 20:45:39,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:39" (1/1) ... [2020-09-24 20:45:39,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:39" (1/1) ... [2020-09-24 20:45:39,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:39" (1/1) ... [2020-09-24 20:45:39,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:45:39,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:45:39,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:45:39,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:45:39,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:39" (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 20:45:39,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:45:39,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:45:39,526 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 20:45:39,526 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:45:39,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:45:39,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 20:45:39,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-24 20:45:39,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 20:45:39,527 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 20:45:39,527 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 20:45:39,527 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 20:45:39,528 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 20:45:39,528 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 20:45:39,528 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 20:45:39,528 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 20:45:39,528 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 20:45:39,529 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-09-24 20:45:39,529 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 20:45:39,529 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 20:45:39,530 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:45:39,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:45:39,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:45:42,720 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:45:42,720 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 20:45:42,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:45:42 BoogieIcfgContainer [2020-09-24 20:45:42,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:45:42,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:45:42,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:45:42,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:45:42,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:45:37" (1/3) ... [2020-09-24 20:45:42,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8fa500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:45:42, skipping insertion in model container [2020-09-24 20:45:42,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:45:39" (2/3) ... [2020-09-24 20:45:42,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d8fa500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:45:42, skipping insertion in model container [2020-09-24 20:45:42,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:45:42" (3/3) ... [2020-09-24 20:45:42,748 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 20:45:42,763 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:45:42,776 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:45:42,803 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:45:42,846 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:45:42,846 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:45:42,846 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:45:42,846 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:45:42,847 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:45:42,847 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:45:42,847 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:45:42,847 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:45:42,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states. [2020-09-24 20:45:43,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2020-09-24 20:45:43,011 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:45:43,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:45:43,014 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:45:43,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:45:43,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1035850514, now seen corresponding path program 1 times [2020-09-24 20:45:43,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:45:43,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366451446] [2020-09-24 20:45:43,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:45:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:44,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:45,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:46,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:47,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:47,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:48,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:48,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:49,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:45:49,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 927 [2020-09-24 20:45:49,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 20:45:49,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5129 [2020-09-24 20:45:49,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:45:49,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:45:49,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 277 [2020-09-24 20:45:49,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 164 [2020-09-24 20:45:49,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:45:50,795 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-24 20:45:50,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:45:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:50,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:50,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:45:50,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 20:45:50,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:45:50,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-09-24 20:45:50,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:45:50,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:45:50,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:45:50,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:45:50,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:45:52,006 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 20:45:52,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366451446] [2020-09-24 20:45:52,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:45:52,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:45:52,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911991628] [2020-09-24 20:45:52,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:45:52,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:45:52,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:45:52,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:45:52,043 INFO L87 Difference]: Start difference. First operand 2018 states. Second operand 5 states. [2020-09-24 20:46:08,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:46:08,617 INFO L93 Difference]: Finished difference Result 5340 states and 7151 transitions. [2020-09-24 20:46:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 20:46:08,619 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 920 [2020-09-24 20:46:08,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:46:08,672 INFO L225 Difference]: With dead ends: 5340 [2020-09-24 20:46:08,672 INFO L226 Difference]: Without dead ends: 3332 [2020-09-24 20:46:08,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:46:08,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3332 states. [2020-09-24 20:46:08,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3332 to 3330. [2020-09-24 20:46:08,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3330 states. [2020-09-24 20:46:08,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3330 states to 3330 states and 4198 transitions. [2020-09-24 20:46:08,945 INFO L78 Accepts]: Start accepts. Automaton has 3330 states and 4198 transitions. Word has length 920 [2020-09-24 20:46:08,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:46:08,948 INFO L479 AbstractCegarLoop]: Abstraction has 3330 states and 4198 transitions. [2020-09-24 20:46:08,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:46:08,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3330 states and 4198 transitions. [2020-09-24 20:46:08,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 923 [2020-09-24 20:46:08,990 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:46:08,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:46:08,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:46:08,992 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:46:08,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:46:08,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1948925643, now seen corresponding path program 1 times [2020-09-24 20:46:08,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:46:08,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754737870] [2020-09-24 20:46:08,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:46:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:46:09,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:09,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:10,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:10,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:10,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:11,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:11,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:12,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:12,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:13,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:13,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:14,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:46:14,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 929 [2020-09-24 20:46:14,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 20:46:14,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5136 [2020-09-24 20:46:14,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:46:14,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:46:14,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 281 [2020-09-24 20:46:14,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-09-24 20:46:14,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-24 20:46:15,490 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 277 [2020-09-24 20:46:15,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:46:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:46:15,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:46:15,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:46:15,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 20:46:15,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:46:15,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-09-24 20:46:15,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:46:15,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:46:15,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:46:15,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:46:15,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:46:16,356 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 20:46:16,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754737870] [2020-09-24 20:46:16,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:46:16,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:46:16,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148377267] [2020-09-24 20:46:16,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:46:16,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:46:16,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:46:16,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:46:16,364 INFO L87 Difference]: Start difference. First operand 3330 states and 4198 transitions. Second operand 5 states.