/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_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:44:40,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:44:40,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:44:40,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:44:40,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:44:40,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:44:40,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:44:40,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:44:40,285 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:44:40,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:44:40,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:44:40,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:44:40,291 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:44:40,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:44:40,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:44:40,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:44:40,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:44:40,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:44:40,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:44:40,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:44:40,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:44:40,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:44:40,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:44:40,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:44:40,327 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:44:40,327 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:44:40,327 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:44:40,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:44:40,331 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:44:40,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:44:40,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:44:40,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:44:40,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:44:40,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:44:40,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:44:40,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:44:40,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:44:40,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:44:40,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:44:40,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:44:40,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:44:40,344 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 20:44:40,385 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:44:40,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:44:40,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:44:40,387 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:44:40,387 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:44:40,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:44:40,388 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:44:40,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:44:40,388 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:44:40,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:44:40,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:44:40,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:44:40,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:44:40,389 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:44:40,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:44:40,390 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:44:40,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:44:40,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:44:40,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:44:40,391 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:44:40,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:44:40,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:44:40,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:44:40,392 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:44:40,392 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:44:40,392 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:44:40,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:44:40,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:44:40,393 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:44:40,393 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 20:44:40,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:44:40,857 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:44:40,861 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:44:40,863 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:44:40,864 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:44:40,865 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-24 20:44:40,966 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c5fd04e0/38e77f0e0a3f4005bfc86b33345f7a99/FLAG156a75b65 [2020-09-24 20:44:41,626 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:44:41,627 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-24 20:44:41,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c5fd04e0/38e77f0e0a3f4005bfc86b33345f7a99/FLAG156a75b65 [2020-09-24 20:44:41,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c5fd04e0/38e77f0e0a3f4005bfc86b33345f7a99 [2020-09-24 20:44:41,873 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:44:41,880 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:44:41,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:44:41,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:44:41,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:44:41,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:44:41" (1/1) ... [2020-09-24 20:44:41,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1972044a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:41, skipping insertion in model container [2020-09-24 20:44:41,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:44:41" (1/1) ... [2020-09-24 20:44:41,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:44:42,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:44:42,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:44:42,586 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:44:42,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:44:42,775 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:44:42,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:42 WrapperNode [2020-09-24 20:44:42,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:44:42,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:44:42,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:44:42,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:44:42,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:42" (1/1) ... [2020-09-24 20:44:42,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:42" (1/1) ... [2020-09-24 20:44:42,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:42" (1/1) ... [2020-09-24 20:44:42,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:42" (1/1) ... [2020-09-24 20:44:42,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:42" (1/1) ... [2020-09-24 20:44:42,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:42" (1/1) ... [2020-09-24 20:44:42,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:42" (1/1) ... [2020-09-24 20:44:42,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:44:42,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:44:42,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:44:42,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:44:42,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:42" (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 20:44:42,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:44:42,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:44:42,982 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 20:44:42,982 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:44:42,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:44:42,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 20:44:42,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-24 20:44:42,983 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-24 20:44:42,984 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 20:44:42,984 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 20:44:42,984 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-24 20:44:42,985 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-24 20:44:42,985 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-24 20:44:42,985 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-24 20:44:42,985 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-24 20:44:42,986 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-24 20:44:42,987 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 20:44:42,987 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:44:42,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:44:42,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:44:44,660 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:44:44,661 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 20:44:44,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:44:44 BoogieIcfgContainer [2020-09-24 20:44:44,674 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:44:44,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:44:44,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:44:44,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:44:44,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:44:41" (1/3) ... [2020-09-24 20:44:44,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47391a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:44:44, skipping insertion in model container [2020-09-24 20:44:44,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:44:42" (2/3) ... [2020-09-24 20:44:44,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47391a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:44:44, skipping insertion in model container [2020-09-24 20:44:44,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:44:44" (3/3) ... [2020-09-24 20:44:44,684 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-24 20:44:44,698 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:44:44,716 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:44:44,741 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:44:44,781 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:44:44,782 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:44:44,782 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:44:44,782 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:44:44,782 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:44:44,782 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:44:44,783 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:44:44,783 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:44:44,822 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states. [2020-09-24 20:44:44,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-09-24 20:44:44,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:44:44,854 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] [2020-09-24 20:44:44,855 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:44:44,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:44:44,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1493724513, now seen corresponding path program 1 times [2020-09-24 20:44:44,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:44:44,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311572736] [2020-09-24 20:44:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:44:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:45,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:45,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:46,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:46,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:46,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:46,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:47,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:47,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:50,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:50,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-09-24 20:44:50,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 20:44:50,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-09-24 20:44:50,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:50,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:44:50,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 165 [2020-09-24 20:44:50,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-09-24 20:44:50,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:44:51,033 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-24 20:44:51,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:44:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:51,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:51,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:51,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 20:44:51,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:51,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-24 20:44:51,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:51,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:44:51,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:51,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:44:51,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:51,414 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 20:44:51,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311572736] [2020-09-24 20:44:51,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:44:51,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:44:51,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479475047] [2020-09-24 20:44:51,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:44:51,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:44:51,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:44:51,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:44:51,463 INFO L87 Difference]: Start difference. First operand 822 states. Second operand 5 states. [2020-09-24 20:44:57,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:44:57,545 INFO L93 Difference]: Finished difference Result 2044 states and 2700 transitions. [2020-09-24 20:44:57,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 20:44:57,553 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 418 [2020-09-24 20:44:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:44:57,587 INFO L225 Difference]: With dead ends: 2044 [2020-09-24 20:44:57,588 INFO L226 Difference]: Without dead ends: 1234 [2020-09-24 20:44:57,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:44:57,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2020-09-24 20:44:57,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1232. [2020-09-24 20:44:57,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1232 states. [2020-09-24 20:44:57,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1489 transitions. [2020-09-24 20:44:57,742 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1489 transitions. Word has length 418 [2020-09-24 20:44:57,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:44:57,744 INFO L479 AbstractCegarLoop]: Abstraction has 1232 states and 1489 transitions. [2020-09-24 20:44:57,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:44:57,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1489 transitions. [2020-09-24 20:44:57,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-09-24 20:44:57,763 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:44:57,764 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] [2020-09-24 20:44:57,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:44:57,765 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:44:57,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:44:57,765 INFO L82 PathProgramCache]: Analyzing trace with hash 939136705, now seen corresponding path program 1 times [2020-09-24 20:44:57,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:44:57,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756468968] [2020-09-24 20:44:57,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:44:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:57,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:58,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:58,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:58,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:58,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:58,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:58,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:01,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:02,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:45:02,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 426 [2020-09-24 20:45:02,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 20:45:02,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-24 20:45:02,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:45:02,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:45:02,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 167 [2020-09-24 20:45:02,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-09-24 20:45:02,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:45:03,308 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-24 20:45:03,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:45:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:03,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:03,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:45:03,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 20:45:03,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:45:03,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-24 20:45:03,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:45:03,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:45:03,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:45:03,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:45:03,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:45:03,566 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 20:45:03,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756468968] [2020-09-24 20:45:03,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:45:03,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:45:03,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013554269] [2020-09-24 20:45:03,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:45:03,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:45:03,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:45:03,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:45:03,572 INFO L87 Difference]: Start difference. First operand 1232 states and 1489 transitions. Second operand 5 states. [2020-09-24 20:45:08,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:45:08,039 INFO L93 Difference]: Finished difference Result 3224 states and 3945 transitions. [2020-09-24 20:45:08,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 20:45:08,044 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 419 [2020-09-24 20:45:08,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:45:08,056 INFO L225 Difference]: With dead ends: 3224 [2020-09-24 20:45:08,056 INFO L226 Difference]: Without dead ends: 2196 [2020-09-24 20:45:08,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:45:08,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2020-09-24 20:45:08,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 2194. [2020-09-24 20:45:08,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2194 states. [2020-09-24 20:45:08,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 2659 transitions. [2020-09-24 20:45:08,163 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 2659 transitions. Word has length 419 [2020-09-24 20:45:08,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:45:08,164 INFO L479 AbstractCegarLoop]: Abstraction has 2194 states and 2659 transitions. [2020-09-24 20:45:08,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:45:08,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 2659 transitions. [2020-09-24 20:45:08,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-09-24 20:45:08,178 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:45:08,179 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] [2020-09-24 20:45:08,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:45:08,179 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:45:08,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:45:08,180 INFO L82 PathProgramCache]: Analyzing trace with hash 2002871987, now seen corresponding path program 1 times [2020-09-24 20:45:08,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:45:08,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724265400] [2020-09-24 20:45:08,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:45:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:08,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:08,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:08,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:08,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:08,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:09,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:10,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:10,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:13,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:45:13,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 427 [2020-09-24 20:45:13,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 20:45:13,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 20:45:13,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:45:13,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:45:13,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 166 [2020-09-24 20:45:13,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-09-24 20:45:13,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:45:13,665 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-24 20:45:13,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:45:13,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:13,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:13,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:45:13,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 20:45:13,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:45:13,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-24 20:45:13,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:45:13,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:45:13,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:45:13,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:45:13,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:45:13,905 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 20:45:13,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724265400] [2020-09-24 20:45:13,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:45:13,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:45:13,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095669689] [2020-09-24 20:45:13,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:45:13,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:45:13,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:45:13,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:45:13,908 INFO L87 Difference]: Start difference. First operand 2194 states and 2659 transitions. Second operand 5 states. [2020-09-24 20:45:18,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:45:18,711 INFO L93 Difference]: Finished difference Result 5740 states and 7017 transitions. [2020-09-24 20:45:18,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 20:45:18,714 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 420 [2020-09-24 20:45:18,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:45:18,732 INFO L225 Difference]: With dead ends: 5740 [2020-09-24 20:45:18,733 INFO L226 Difference]: Without dead ends: 4074 [2020-09-24 20:45:18,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:45:18,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4074 states. [2020-09-24 20:45:18,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4074 to 4072. [2020-09-24 20:45:18,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4072 states. [2020-09-24 20:45:18,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4072 states to 4072 states and 4933 transitions. [2020-09-24 20:45:18,896 INFO L78 Accepts]: Start accepts. Automaton has 4072 states and 4933 transitions. Word has length 420 [2020-09-24 20:45:18,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:45:18,897 INFO L479 AbstractCegarLoop]: Abstraction has 4072 states and 4933 transitions. [2020-09-24 20:45:18,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:45:18,897 INFO L276 IsEmpty]: Start isEmpty. Operand 4072 states and 4933 transitions. [2020-09-24 20:45:18,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2020-09-24 20:45:18,911 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:45:18,912 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] [2020-09-24 20:45:18,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:45:18,913 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:45:18,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:45:18,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1873171053, now seen corresponding path program 1 times [2020-09-24 20:45:18,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:45:18,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302165199] [2020-09-24 20:45:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:45:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:19,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:19,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:19,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:19,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:19,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:20,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:20,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:21,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:23,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:45:23,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 428 [2020-09-24 20:45:23,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 20:45:23,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-24 20:45:24,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:45:24,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:45:24,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-09-24 20:45:24,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-09-24 20:45:24,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 20:45:24,445 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-09-24 20:45:24,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:45:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:24,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:45:24,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:45:24,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-24 20:45:24,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:45:24,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-24 20:45:24,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:45:24,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:45:24,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:45:24,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:45:24,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:45:24,736 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 20:45:24,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302165199] [2020-09-24 20:45:24,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:45:24,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:45:24,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512413641] [2020-09-24 20:45:24,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:45:24,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:45:24,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:45:24,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:45:24,739 INFO L87 Difference]: Start difference. First operand 4072 states and 4933 transitions. Second operand 5 states. [2020-09-24 20:45:29,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:45:29,836 INFO L93 Difference]: Finished difference Result 10841 states and 13189 transitions. [2020-09-24 20:45:29,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 20:45:29,837 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 421 [2020-09-24 20:45:29,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:45:29,867 INFO L225 Difference]: With dead ends: 10841 [2020-09-24 20:45:29,867 INFO L226 Difference]: Without dead ends: 7719 [2020-09-24 20:45:29,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:45:29,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7719 states. [2020-09-24 20:45:30,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7719 to 7717. [2020-09-24 20:45:30,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7717 states. [2020-09-24 20:45:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7717 states to 7717 states and 9315 transitions. [2020-09-24 20:45:30,329 INFO L78 Accepts]: Start accepts. Automaton has 7717 states and 9315 transitions. Word has length 421 [2020-09-24 20:45:30,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:45:30,330 INFO L479 AbstractCegarLoop]: Abstraction has 7717 states and 9315 transitions. [2020-09-24 20:45:30,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:45:30,330 INFO L276 IsEmpty]: Start isEmpty. Operand 7717 states and 9315 transitions. [2020-09-24 20:45:30,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-09-24 20:45:30,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:45:30,345 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] [2020-09-24 20:45:30,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 20:45:30,346 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:45:30,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:45:30,347 INFO L82 PathProgramCache]: Analyzing trace with hash -2081193861, now seen corresponding path program 1 times [2020-09-24 20:45:30,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:45:30,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447898584] [2020-09-24 20:45:30,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:45:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:45:30,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking...