/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:36:21,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:36:21,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:36:21,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:36:21,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:36:21,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:36:21,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:36:21,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:36:21,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:36:21,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:36:21,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:36:21,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:36:21,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:36:21,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:36:21,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:36:21,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:36:21,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:36:21,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:36:21,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:36:21,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:36:21,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:36:21,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:36:21,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:36:21,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:36:21,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:36:21,259 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:36:21,259 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:36:21,266 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:36:21,267 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:36:21,268 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:36:21,268 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:36:21,269 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:36:21,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:36:21,271 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:36:21,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:36:21,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:36:21,273 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:36:21,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:36:21,274 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:36:21,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:36:21,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:36:21,277 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 19:36:21,302 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:36:21,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:36:21,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:36:21,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:36:21,304 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:36:21,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:36:21,305 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:36:21,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:36:21,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:36:21,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:36:21,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:36:21,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:36:21,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:36:21,306 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:36:21,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:36:21,307 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:36:21,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:36:21,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:36:21,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:36:21,308 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:36:21,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:36:21,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:36:21,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:36:21,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:36:21,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:36:21,309 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:36:21,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:36:21,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:36:21,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:36:21,310 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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:36:21,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:36:21,836 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:36:21,841 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:36:21,844 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:36:21,844 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:36:21,846 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 19:36:21,943 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a028d0ac/227ebd1fdd1047b3b0fcc040ea2b0310/FLAGae7a323e9 [2020-09-24 19:36:22,615 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:36:22,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 19:36:22,632 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a028d0ac/227ebd1fdd1047b3b0fcc040ea2b0310/FLAGae7a323e9 [2020-09-24 19:36:22,865 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a028d0ac/227ebd1fdd1047b3b0fcc040ea2b0310 [2020-09-24 19:36:22,880 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:36:22,889 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:36:22,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:36:22,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:36:22,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:36:22,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:36:22" (1/1) ... [2020-09-24 19:36:22,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@684fb7f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:22, skipping insertion in model container [2020-09-24 19:36:22,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:36:22" (1/1) ... [2020-09-24 19:36:22,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:36:23,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:36:23,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:36:23,581 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:36:23,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:36:23,764 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:36:23,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:23 WrapperNode [2020-09-24 19:36:23,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:36:23,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:36:23,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:36:23,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:36:23,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:23" (1/1) ... [2020-09-24 19:36:23,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:23" (1/1) ... [2020-09-24 19:36:23,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:23" (1/1) ... [2020-09-24 19:36:23,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:23" (1/1) ... [2020-09-24 19:36:23,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:23" (1/1) ... [2020-09-24 19:36:23,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:23" (1/1) ... [2020-09-24 19:36:23,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:23" (1/1) ... [2020-09-24 19:36:23,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:36:23,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:36:23,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:36:23,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:36:23,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:23" (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 19:36:23,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:36:23,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:36:23,983 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 19:36:23,984 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:36:23,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:36:23,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 19:36:23,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-24 19:36:23,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 19:36:23,986 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 19:36:23,986 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 19:36:23,986 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 19:36:23,987 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 19:36:23,987 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 19:36:23,987 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 19:36:23,987 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 19:36:23,988 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 19:36:23,988 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 19:36:23,989 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 19:36:23,989 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:36:23,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:36:23,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:36:25,572 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:36:25,573 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 19:36:25,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:36:25 BoogieIcfgContainer [2020-09-24 19:36:25,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:36:25,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:36:25,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:36:25,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:36:25,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:36:22" (1/3) ... [2020-09-24 19:36:25,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd4a3af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:36:25, skipping insertion in model container [2020-09-24 19:36:25,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:36:23" (2/3) ... [2020-09-24 19:36:25,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd4a3af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:36:25, skipping insertion in model container [2020-09-24 19:36:25,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:36:25" (3/3) ... [2020-09-24 19:36:25,597 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-24 19:36:25,608 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:36:25,620 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:36:25,646 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:36:25,682 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:36:25,682 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:36:25,682 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:36:25,682 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:36:25,683 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:36:25,683 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:36:25,683 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:36:25,683 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:36:25,721 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states. [2020-09-24 19:36:25,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-09-24 19:36:25,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:36:25,753 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] [2020-09-24 19:36:25,753 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:36:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:36:25,762 INFO L82 PathProgramCache]: Analyzing trace with hash -361300248, now seen corresponding path program 1 times [2020-09-24 19:36:25,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:36:25,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082010653] [2020-09-24 19:36:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:36:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:26,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:26,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:27,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:27,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:27,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:27,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 414 [2020-09-24 19:36:27,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:36:27,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1079 [2020-09-24 19:36:27,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:27,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:36:27,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-09-24 19:36:27,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-24 19:36:27,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 19:36:28,152 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 19:36:28,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:36:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:28,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:28,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:28,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 19:36:28,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:36:28,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-24 19:36:28,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:28,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:36:28,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:36:28,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:36:28,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:36:28,650 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 19:36:28,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082010653] [2020-09-24 19:36:28,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:36:28,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:36:28,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484342789] [2020-09-24 19:36:28,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:36:28,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:36:28,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:36:28,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:36:28,698 INFO L87 Difference]: Start difference. First operand 813 states. Second operand 5 states. [2020-09-24 19:36:34,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:36:34,061 INFO L93 Difference]: Finished difference Result 2068 states and 2752 transitions. [2020-09-24 19:36:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:36:34,063 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 407 [2020-09-24 19:36:34,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:36:34,097 INFO L225 Difference]: With dead ends: 2068 [2020-09-24 19:36:34,097 INFO L226 Difference]: Without dead ends: 1234 [2020-09-24 19:36:34,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:36:34,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2020-09-24 19:36:34,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1232. [2020-09-24 19:36:34,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1232 states. [2020-09-24 19:36:34,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1499 transitions. [2020-09-24 19:36:34,248 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1499 transitions. Word has length 407 [2020-09-24 19:36:34,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:36:34,250 INFO L479 AbstractCegarLoop]: Abstraction has 1232 states and 1499 transitions. [2020-09-24 19:36:34,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:36:34,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1499 transitions. [2020-09-24 19:36:34,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-09-24 19:36:34,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:36:34,259 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] [2020-09-24 19:36:34,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:36:34,260 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:36:34,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:36:34,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1185743993, now seen corresponding path program 1 times [2020-09-24 19:36:34,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:36:34,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653516047] [2020-09-24 19:36:34,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:36:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:34,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:34,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:34,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:35,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:35,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:35,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:35,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:35,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 415 [2020-09-24 19:36:35,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:36:35,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1048 [2020-09-24 19:36:35,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:35,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:36:35,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-09-24 19:36:35,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 19:36:35,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:36:35,659 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 19:36:35,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:36:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:35,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:35,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:35,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 19:36:35,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:36:35,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-24 19:36:35,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:35,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:36:35,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:36:35,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:36:35,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:36:36,063 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 19:36:36,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653516047] [2020-09-24 19:36:36,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:36:36,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:36:36,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820122282] [2020-09-24 19:36:36,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:36:36,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:36:36,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:36:36,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:36:36,073 INFO L87 Difference]: Start difference. First operand 1232 states and 1499 transitions. Second operand 4 states. [2020-09-24 19:36:38,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:36:38,853 INFO L93 Difference]: Finished difference Result 3339 states and 4125 transitions. [2020-09-24 19:36:38,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:36:38,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 408 [2020-09-24 19:36:38,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:36:38,870 INFO L225 Difference]: With dead ends: 3339 [2020-09-24 19:36:38,870 INFO L226 Difference]: Without dead ends: 2294 [2020-09-24 19:36:38,874 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 [2020-09-24 19:36:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2020-09-24 19:36:38,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1235. [2020-09-24 19:36:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1235 states. [2020-09-24 19:36:38,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1503 transitions. [2020-09-24 19:36:38,950 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1503 transitions. Word has length 408 [2020-09-24 19:36:38,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:36:38,952 INFO L479 AbstractCegarLoop]: Abstraction has 1235 states and 1503 transitions. [2020-09-24 19:36:38,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:36:38,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1503 transitions. [2020-09-24 19:36:38,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-24 19:36:38,961 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:36:38,961 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] [2020-09-24 19:36:38,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:36:38,961 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:36:38,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:36:38,962 INFO L82 PathProgramCache]: Analyzing trace with hash -801557755, now seen corresponding path program 1 times [2020-09-24 19:36:38,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:36:38,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608371891] [2020-09-24 19:36:38,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:36:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:39,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:39,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:39,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:39,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:39,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:39,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:40,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:40,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-09-24 19:36:40,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:36:40,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-09-24 19:36:40,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:40,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:36:40,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-09-24 19:36:40,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 19:36:40,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:36:40,391 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 19:36:40,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:36:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:40,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:40,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:40,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 19:36:40,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:36:40,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 19:36:40,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:40,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:36:40,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:36:40,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:36:40,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:36:40,638 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 19:36:40,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608371891] [2020-09-24 19:36:40,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:36:40,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:36:40,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287832427] [2020-09-24 19:36:40,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:36:40,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:36:40,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:36:40,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:36:40,642 INFO L87 Difference]: Start difference. First operand 1235 states and 1503 transitions. Second operand 4 states. [2020-09-24 19:36:44,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:36:44,991 INFO L93 Difference]: Finished difference Result 3077 states and 3800 transitions. [2020-09-24 19:36:44,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:36:44,992 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 409 [2020-09-24 19:36:44,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:36:45,003 INFO L225 Difference]: With dead ends: 3077 [2020-09-24 19:36:45,003 INFO L226 Difference]: Without dead ends: 2219 [2020-09-24 19:36:45,006 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 [2020-09-24 19:36:45,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2020-09-24 19:36:45,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 2217. [2020-09-24 19:36:45,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2217 states. [2020-09-24 19:36:45,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 2712 transitions. [2020-09-24 19:36:45,099 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 2712 transitions. Word has length 409 [2020-09-24 19:36:45,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:36:45,100 INFO L479 AbstractCegarLoop]: Abstraction has 2217 states and 2712 transitions. [2020-09-24 19:36:45,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:36:45,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 2712 transitions. [2020-09-24 19:36:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-24 19:36:45,112 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:36:45,113 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] [2020-09-24 19:36:45,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:36:45,113 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:36:45,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:36:45,116 INFO L82 PathProgramCache]: Analyzing trace with hash -146505083, now seen corresponding path program 1 times [2020-09-24 19:36:45,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:36:45,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141767093] [2020-09-24 19:36:45,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:36:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:45,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:45,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:45,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:45,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:45,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:46,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:46,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:46,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-09-24 19:36:46,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:36:46,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1020 [2020-09-24 19:36:46,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:46,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:36:46,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 158 [2020-09-24 19:36:46,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-09-24 19:36:46,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:36:46,614 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 19:36:46,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:36:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:46,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:46,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:46,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 19:36:46,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:36:46,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-24 19:36:46,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:46,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:36:46,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:36:46,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:36:46,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:36:46,926 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 19:36:46,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141767093] [2020-09-24 19:36:46,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:36:46,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:36:46,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705581230] [2020-09-24 19:36:46,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:36:46,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:36:46,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:36:46,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:36:46,929 INFO L87 Difference]: Start difference. First operand 2217 states and 2712 transitions. Second operand 5 states. [2020-09-24 19:36:51,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:36:51,080 INFO L93 Difference]: Finished difference Result 5904 states and 7269 transitions. [2020-09-24 19:36:51,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 19:36:51,081 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 409 [2020-09-24 19:36:51,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:36:51,100 INFO L225 Difference]: With dead ends: 5904 [2020-09-24 19:36:51,100 INFO L226 Difference]: Without dead ends: 3970 [2020-09-24 19:36:51,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:36:51,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2020-09-24 19:36:51,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 3968. [2020-09-24 19:36:51,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3968 states. [2020-09-24 19:36:51,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 4859 transitions. [2020-09-24 19:36:51,239 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 4859 transitions. Word has length 409 [2020-09-24 19:36:51,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:36:51,239 INFO L479 AbstractCegarLoop]: Abstraction has 3968 states and 4859 transitions. [2020-09-24 19:36:51,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:36:51,240 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 4859 transitions. [2020-09-24 19:36:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-24 19:36:51,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:36:51,254 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] [2020-09-24 19:36:51,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:36:51,254 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:36:51,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:36:51,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1169505706, now seen corresponding path program 1 times [2020-09-24 19:36:51,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:36:51,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966654765] [2020-09-24 19:36:51,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:36:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:51,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:51,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:51,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:51,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:52,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:52,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:52,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-09-24 19:36:52,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:36:52,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1076 [2020-09-24 19:36:52,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:52,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:36:52,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 162 [2020-09-24 19:36:52,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-09-24 19:36:52,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:36:52,893 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 19:36:52,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:36:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:52,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:52,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:52,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 19:36:52,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:36:52,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-24 19:36:52,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:52,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:36:52,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:36:52,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:36:52,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:36:53,271 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 19:36:53,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966654765] [2020-09-24 19:36:53,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:36:53,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:36:53,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260475070] [2020-09-24 19:36:53,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:36:53,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:36:53,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:36:53,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:36:53,275 INFO L87 Difference]: Start difference. First operand 3968 states and 4859 transitions. Second operand 5 states. [2020-09-24 19:36:57,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:36:57,943 INFO L93 Difference]: Finished difference Result 10614 states and 13051 transitions. [2020-09-24 19:36:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 19:36:57,943 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 409 [2020-09-24 19:36:57,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:36:57,971 INFO L225 Difference]: With dead ends: 10614 [2020-09-24 19:36:57,971 INFO L226 Difference]: Without dead ends: 7460 [2020-09-24 19:36:57,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:36:57,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7460 states. [2020-09-24 19:36:58,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7460 to 7458. [2020-09-24 19:36:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7458 states. [2020-09-24 19:36:58,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7458 states to 7458 states and 9097 transitions. [2020-09-24 19:36:58,287 INFO L78 Accepts]: Start accepts. Automaton has 7458 states and 9097 transitions. Word has length 409 [2020-09-24 19:36:58,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:36:58,288 INFO L479 AbstractCegarLoop]: Abstraction has 7458 states and 9097 transitions. [2020-09-24 19:36:58,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:36:58,288 INFO L276 IsEmpty]: Start isEmpty. Operand 7458 states and 9097 transitions. [2020-09-24 19:36:58,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-09-24 19:36:58,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:36:58,307 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] [2020-09-24 19:36:58,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 19:36:58,308 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:36:58,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:36:58,308 INFO L82 PathProgramCache]: Analyzing trace with hash 8606003, now seen corresponding path program 1 times [2020-09-24 19:36:58,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:36:58,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312502225] [2020-09-24 19:36:58,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:36:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:58,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:58,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:58,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:58,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:59,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:59,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:59,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 417 [2020-09-24 19:36:59,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:36:59,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1050 [2020-09-24 19:36:59,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:59,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:36:59,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 179 [2020-09-24 19:36:59,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 19:36:59,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:36:59,763 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 19:36:59,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:36:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:36:59,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:36:59,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:36:59,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 19:36:59,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:36:59,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-24 19:36:59,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:36:59,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:36:59,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:36:59,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:36:59,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:36:59,949 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 19:36:59,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312502225] [2020-09-24 19:36:59,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:36:59,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:36:59,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139668272] [2020-09-24 19:36:59,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:36:59,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:36:59,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:36:59,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:36:59,953 INFO L87 Difference]: Start difference. First operand 7458 states and 9097 transitions. Second operand 4 states. [2020-09-24 19:37:04,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:37:04,481 INFO L93 Difference]: Finished difference Result 21506 states and 26215 transitions. [2020-09-24 19:37:04,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:37:04,482 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 410 [2020-09-24 19:37:04,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:37:04,528 INFO L225 Difference]: With dead ends: 21506 [2020-09-24 19:37:04,529 INFO L226 Difference]: Without dead ends: 14488 [2020-09-24 19:37:04,545 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 [2020-09-24 19:37:04,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14488 states. [2020-09-24 19:37:04,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14488 to 7482. [2020-09-24 19:37:04,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7482 states. [2020-09-24 19:37:04,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7482 states to 7482 states and 9121 transitions. [2020-09-24 19:37:04,908 INFO L78 Accepts]: Start accepts. Automaton has 7482 states and 9121 transitions. Word has length 410 [2020-09-24 19:37:04,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:37:04,908 INFO L479 AbstractCegarLoop]: Abstraction has 7482 states and 9121 transitions. [2020-09-24 19:37:04,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:37:04,909 INFO L276 IsEmpty]: Start isEmpty. Operand 7482 states and 9121 transitions. [2020-09-24 19:37:04,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-09-24 19:37:04,923 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:04,924 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] [2020-09-24 19:37:04,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 19:37:04,924 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:04,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:04,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2086188249, now seen corresponding path program 1 times [2020-09-24 19:37:04,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:04,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867279915] [2020-09-24 19:37:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:05,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:05,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:05,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:05,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:05,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:05,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:05,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 418 [2020-09-24 19:37:05,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 19:37:05,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1008 [2020-09-24 19:37:05,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:05,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:37:05,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 180 [2020-09-24 19:37:05,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 19:37:05,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:37:06,289 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 19:37:06,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:06,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:06,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:06,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 19:37:06,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:06,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-24 19:37:06,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:06,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:06,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:06,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:06,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:06,481 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 19:37:06,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867279915] [2020-09-24 19:37:06,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:06,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 19:37:06,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318932075] [2020-09-24 19:37:06,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:37:06,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:06,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:37:06,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:37:06,484 INFO L87 Difference]: Start difference. First operand 7482 states and 9121 transitions. Second operand 4 states. [2020-09-24 19:37:11,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:37:11,016 INFO L93 Difference]: Finished difference Result 20390 states and 24903 transitions. [2020-09-24 19:37:11,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:37:11,017 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 411 [2020-09-24 19:37:11,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:37:11,042 INFO L225 Difference]: With dead ends: 20390 [2020-09-24 19:37:11,042 INFO L226 Difference]: Without dead ends: 14104 [2020-09-24 19:37:11,055 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 [2020-09-24 19:37:11,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14104 states. [2020-09-24 19:37:11,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14104 to 14102. [2020-09-24 19:37:11,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14102 states. [2020-09-24 19:37:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14102 states to 14102 states and 17069 transitions. [2020-09-24 19:37:11,593 INFO L78 Accepts]: Start accepts. Automaton has 14102 states and 17069 transitions. Word has length 411 [2020-09-24 19:37:11,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:37:11,594 INFO L479 AbstractCegarLoop]: Abstraction has 14102 states and 17069 transitions. [2020-09-24 19:37:11,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:37:11,594 INFO L276 IsEmpty]: Start isEmpty. Operand 14102 states and 17069 transitions. [2020-09-24 19:37:11,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-09-24 19:37:11,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:37:11,614 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] [2020-09-24 19:37:11,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 19:37:11,614 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:37:11,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:37:11,615 INFO L82 PathProgramCache]: Analyzing trace with hash -840043175, now seen corresponding path program 1 times [2020-09-24 19:37:11,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:37:11,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566375844] [2020-09-24 19:37:11,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:37:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:11,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:11,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:12,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:12,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:12,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:12,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:12,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:12,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 418 [2020-09-24 19:37:12,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 19:37:12,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1034 [2020-09-24 19:37:12,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:12,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:37:12,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-09-24 19:37:12,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-24 19:37:12,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:37:13,085 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-24 19:37:13,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:37:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:37:13,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:37:13,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:37:13,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 19:37:13,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:37:13,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-24 19:37:13,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:37:13,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:37:13,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:37:13,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:37:13,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:37:13,315 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 19:37:13,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566375844] [2020-09-24 19:37:13,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:37:13,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:37:13,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463597945] [2020-09-24 19:37:13,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:37:13,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:37:13,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:37:13,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:37:13,318 INFO L87 Difference]: Start difference. First operand 14102 states and 17069 transitions. Second operand 5 states.