/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 08:04:46,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 08:04:46,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 08:04:46,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 08:04:46,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 08:04:46,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 08:04:46,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 08:04:46,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 08:04:46,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 08:04:46,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 08:04:46,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 08:04:46,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 08:04:46,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 08:04:46,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 08:04:46,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 08:04:46,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 08:04:46,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 08:04:46,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 08:04:46,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 08:04:46,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 08:04:46,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 08:04:46,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 08:04:46,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 08:04:46,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 08:04:46,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 08:04:46,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 08:04:46,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 08:04:46,237 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 08:04:46,238 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 08:04:46,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 08:04:46,239 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 08:04:46,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 08:04:46,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 08:04:46,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 08:04:46,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 08:04:46,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 08:04:46,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 08:04:46,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 08:04:46,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 08:04:46,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 08:04:46,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 08:04:46,251 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 08:04:46,306 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 08:04:46,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 08:04:46,309 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 08:04:46,310 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 08:04:46,310 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 08:04:46,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 08:04:46,311 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 08:04:46,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 08:04:46,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 08:04:46,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 08:04:46,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 08:04:46,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 08:04:46,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 08:04:46,314 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 08:04:46,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 08:04:46,314 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 08:04:46,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 08:04:46,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 08:04:46,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 08:04:46,315 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 08:04:46,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 08:04:46,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 08:04:46,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 08:04:46,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 08:04:46,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 08:04:46,316 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 08:04:46,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 08:04:46,316 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 08:04:46,319 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 08:04:46,319 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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-09-25 08:04:46,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 08:04:46,808 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 08:04:46,815 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 08:04:46,818 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 08:04:46,818 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 08:04:46,819 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 08:04:46,901 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d2ee0038/921bade0a6fd43ca8d8b421894ebe4ee/FLAGab0055c93 [2020-09-25 08:04:47,580 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 08:04:47,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 08:04:47,595 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d2ee0038/921bade0a6fd43ca8d8b421894ebe4ee/FLAGab0055c93 [2020-09-25 08:04:47,793 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9d2ee0038/921bade0a6fd43ca8d8b421894ebe4ee [2020-09-25 08:04:47,807 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 08:04:47,814 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 08:04:47,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 08:04:47,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 08:04:47,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 08:04:47,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:04:47" (1/1) ... [2020-09-25 08:04:47,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@457589d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:47, skipping insertion in model container [2020-09-25 08:04:47,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:04:47" (1/1) ... [2020-09-25 08:04:47,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 08:04:47,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 08:04:48,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:04:48,525 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 08:04:48,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:04:48,964 INFO L208 MainTranslator]: Completed translation [2020-09-25 08:04:48,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:48 WrapperNode [2020-09-25 08:04:48,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 08:04:48,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 08:04:48,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 08:04:48,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 08:04:48,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:48" (1/1) ... [2020-09-25 08:04:48,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:48" (1/1) ... [2020-09-25 08:04:49,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:48" (1/1) ... [2020-09-25 08:04:49,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:48" (1/1) ... [2020-09-25 08:04:49,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:48" (1/1) ... [2020-09-25 08:04:49,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:48" (1/1) ... [2020-09-25 08:04:49,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:48" (1/1) ... [2020-09-25 08:04:49,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 08:04:49,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 08:04:49,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 08:04:49,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 08:04:49,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 08:04:49,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 08:04:49,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 08:04:49,197 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 08:04:49,197 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 08:04:49,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 08:04:49,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 08:04:49,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 08:04:49,199 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 08:04:49,199 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 08:04:49,200 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 08:04:49,200 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 08:04:49,200 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 08:04:49,200 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 08:04:49,200 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 08:04:49,201 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 08:04:49,202 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 08:04:49,202 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 08:04:49,202 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 08:04:49,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 08:04:49,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 08:04:50,979 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 08:04:50,979 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 08:04:50,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:04:50 BoogieIcfgContainer [2020-09-25 08:04:50,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 08:04:50,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 08:04:50,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 08:04:50,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 08:04:50,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 08:04:47" (1/3) ... [2020-09-25 08:04:50,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d32bae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:04:50, skipping insertion in model container [2020-09-25 08:04:51,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:48" (2/3) ... [2020-09-25 08:04:51,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d32bae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:04:51, skipping insertion in model container [2020-09-25 08:04:51,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:04:50" (3/3) ... [2020-09-25 08:04:51,003 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-09-25 08:04:51,015 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 08:04:51,027 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 08:04:51,052 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 08:04:51,091 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 08:04:51,092 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 08:04:51,092 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 08:04:51,092 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 08:04:51,092 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 08:04:51,093 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 08:04:51,093 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 08:04:51,093 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 08:04:51,151 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states. [2020-09-25 08:04:51,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-25 08:04:51,208 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:04:51,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:04:51,210 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:04:51,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:04:51,219 INFO L82 PathProgramCache]: Analyzing trace with hash 752602954, now seen corresponding path program 1 times [2020-09-25 08:04:51,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:04:51,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832098659] [2020-09-25 08:04:51,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:04:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:04:52,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:52,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:52,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:52,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:53,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:53,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:53,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:54,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:56,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:04:56,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-25 08:04:56,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 08:04:56,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-09-25 08:04:56,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:04:56,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:04:56,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:04:56,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 205 [2020-09-25 08:04:56,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-09-25 08:04:56,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 08:04:57,450 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-25 08:04:57,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:04:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:04:57,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:04:57,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:04:57,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 08:04:57,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:04:57,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-25 08:04:57,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:04:57,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:04:57,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:04:57,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:04:57,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:04:57,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:04:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:04:57,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832098659] [2020-09-25 08:04:57,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:04:57,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 08:04:57,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395476193] [2020-09-25 08:04:57,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 08:04:57,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:04:57,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 08:04:57,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 08:04:57,865 INFO L87 Difference]: Start difference. First operand 912 states. Second operand 4 states. [2020-09-25 08:05:01,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:05:01,456 INFO L93 Difference]: Finished difference Result 1664 states and 2163 transitions. [2020-09-25 08:05:01,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 08:05:01,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-09-25 08:05:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:05:01,496 INFO L225 Difference]: With dead ends: 1664 [2020-09-25 08:05:01,496 INFO L226 Difference]: Without dead ends: 1251 [2020-09-25 08:05:01,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 08:05:01,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2020-09-25 08:05:01,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1244. [2020-09-25 08:05:01,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1244 states. [2020-09-25 08:05:01,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1517 transitions. [2020-09-25 08:05:01,633 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1517 transitions. Word has length 460 [2020-09-25 08:05:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:05:01,635 INFO L479 AbstractCegarLoop]: Abstraction has 1244 states and 1517 transitions. [2020-09-25 08:05:01,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 08:05:01,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1517 transitions. [2020-09-25 08:05:01,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-25 08:05:01,648 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:05:01,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:05:01,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 08:05:01,649 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:05:01,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:05:01,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1495383786, now seen corresponding path program 1 times [2020-09-25 08:05:01,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:05:01,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677541640] [2020-09-25 08:05:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:05:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:05:01,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:02,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:02,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:02,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:02,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:02,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:03,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:03,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:06,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:05:06,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-25 08:05:06,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 08:05:06,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 08:05:06,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:05:06,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:05:06,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:05:06,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 206 [2020-09-25 08:05:06,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 223 [2020-09-25 08:05:06,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:05:07,234 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-25 08:05:07,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:05:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:05:07,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:07,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:05:07,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 08:05:07,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:05:07,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-25 08:05:07,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:05:07,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:05:07,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:05:07,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:05:07,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:05:07,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:05:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:05:07,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677541640] [2020-09-25 08:05:07,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:05:07,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 08:05:07,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642631561] [2020-09-25 08:05:07,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 08:05:07,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:05:07,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 08:05:07,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 08:05:07,607 INFO L87 Difference]: Start difference. First operand 1244 states and 1517 transitions. Second operand 4 states. [2020-09-25 08:05:10,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:05:10,821 INFO L93 Difference]: Finished difference Result 2510 states and 3146 transitions. [2020-09-25 08:05:10,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 08:05:10,822 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-09-25 08:05:10,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:05:10,840 INFO L225 Difference]: With dead ends: 2510 [2020-09-25 08:05:10,841 INFO L226 Difference]: Without dead ends: 2066 [2020-09-25 08:05:10,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 08:05:10,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2020-09-25 08:05:10,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 2054. [2020-09-25 08:05:10,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2054 states. [2020-09-25 08:05:10,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 2545 transitions. [2020-09-25 08:05:10,938 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 2545 transitions. Word has length 460 [2020-09-25 08:05:10,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:05:10,940 INFO L479 AbstractCegarLoop]: Abstraction has 2054 states and 2545 transitions. [2020-09-25 08:05:10,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 08:05:10,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 2545 transitions. [2020-09-25 08:05:10,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-25 08:05:10,954 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:05:10,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:05:10,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 08:05:10,955 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:05:10,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:05:10,956 INFO L82 PathProgramCache]: Analyzing trace with hash -863833942, now seen corresponding path program 1 times [2020-09-25 08:05:10,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:05:10,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246172156] [2020-09-25 08:05:10,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:05:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:05:11,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:11,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:11,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:11,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:11,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:11,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:12,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:12,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:16,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:05:16,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-25 08:05:16,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 08:05:16,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 08:05:16,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:05:16,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:05:16,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:05:16,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 207 [2020-09-25 08:05:16,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 233 [2020-09-25 08:05:16,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:05:16,587 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-25 08:05:16,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:05:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:05:16,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:16,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:05:16,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 08:05:16,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:05:16,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-25 08:05:16,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:05:16,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:05:16,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:05:16,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:05:16,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:05:16,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:05:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:05:16,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246172156] [2020-09-25 08:05:16,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:05:16,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 08:05:16,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817114012] [2020-09-25 08:05:16,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 08:05:16,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:05:16,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 08:05:16,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 08:05:16,944 INFO L87 Difference]: Start difference. First operand 2054 states and 2545 transitions. Second operand 4 states. [2020-09-25 08:05:19,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:05:19,620 INFO L93 Difference]: Finished difference Result 4382 states and 5559 transitions. [2020-09-25 08:05:19,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 08:05:19,621 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 460 [2020-09-25 08:05:19,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:05:19,640 INFO L225 Difference]: With dead ends: 4382 [2020-09-25 08:05:19,640 INFO L226 Difference]: Without dead ends: 3596 [2020-09-25 08:05:19,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 08:05:19,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3596 states. [2020-09-25 08:05:19,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3596 to 3574. [2020-09-25 08:05:19,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3574 states. [2020-09-25 08:05:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3574 states to 3574 states and 4481 transitions. [2020-09-25 08:05:19,735 INFO L78 Accepts]: Start accepts. Automaton has 3574 states and 4481 transitions. Word has length 460 [2020-09-25 08:05:19,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:05:19,736 INFO L479 AbstractCegarLoop]: Abstraction has 3574 states and 4481 transitions. [2020-09-25 08:05:19,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 08:05:19,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3574 states and 4481 transitions. [2020-09-25 08:05:19,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2020-09-25 08:05:19,748 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:05:19,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:05:19,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 08:05:19,749 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:05:19,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:05:19,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1795052938, now seen corresponding path program 1 times [2020-09-25 08:05:19,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:05:19,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12145673] [2020-09-25 08:05:19,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:05:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:05:19,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:20,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:20,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:20,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:20,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:20,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:20,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:22,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:23,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:23,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:24,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:05:24,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 467 [2020-09-25 08:05:24,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 08:05:24,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 08:05:24,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:05:24,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:05:24,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:05:24,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 173 [2020-09-25 08:05:24,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-09-25 08:05:24,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:05:25,321 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-09-25 08:05:25,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:05:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:05:25,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:25,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:05:25,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 08:05:25,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:05:25,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-25 08:05:25,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:05:25,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 08:05:25,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:05:25,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:05:25,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:05:25,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:05:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 08:05:25,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12145673] [2020-09-25 08:05:25,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:05:25,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 08:05:25,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355708877] [2020-09-25 08:05:25,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 08:05:25,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:05:25,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 08:05:25,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 08:05:25,673 INFO L87 Difference]: Start difference. First operand 3574 states and 4481 transitions. Second operand 5 states. [2020-09-25 08:05:30,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:05:30,544 INFO L93 Difference]: Finished difference Result 10121 states and 12748 transitions. [2020-09-25 08:05:30,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 08:05:30,550 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 460 [2020-09-25 08:05:30,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:05:30,580 INFO L225 Difference]: With dead ends: 10121 [2020-09-25 08:05:30,581 INFO L226 Difference]: Without dead ends: 6748 [2020-09-25 08:05:30,598 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 [2020-09-25 08:05:30,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2020-09-25 08:05:30,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 6746. [2020-09-25 08:05:30,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6746 states. [2020-09-25 08:05:30,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6746 states to 6746 states and 8441 transitions. [2020-09-25 08:05:30,843 INFO L78 Accepts]: Start accepts. Automaton has 6746 states and 8441 transitions. Word has length 460 [2020-09-25 08:05:30,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:05:30,843 INFO L479 AbstractCegarLoop]: Abstraction has 6746 states and 8441 transitions. [2020-09-25 08:05:30,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 08:05:30,844 INFO L276 IsEmpty]: Start isEmpty. Operand 6746 states and 8441 transitions. [2020-09-25 08:05:30,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-09-25 08:05:30,855 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:05:30,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:05:30,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 08:05:30,857 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:05:30,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:05:30,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1978917356, now seen corresponding path program 1 times [2020-09-25 08:05:30,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:05:30,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255682194] [2020-09-25 08:05:30,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:05:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:05:30,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:31,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:31,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:31,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:31,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:31,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:05:32,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking...