/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 SequenceOfStatements --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 --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:09:13,262 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:09:13,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:09:13,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:09:13,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:09:13,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:09:13,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:09:13,293 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:09:13,295 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:09:13,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:09:13,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:09:13,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:09:13,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:09:13,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:09:13,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:09:13,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:09:13,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:09:13,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:09:13,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:09:13,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:09:13,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:09:13,310 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:09:13,311 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:09:13,312 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:09:13,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:09:13,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:09:13,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:09:13,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:09:13,316 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:09:13,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:09:13,317 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:09:13,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:09:13,319 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:09:13,320 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:09:13,321 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:09:13,321 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:09:13,322 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:09:13,322 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:09:13,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:09:13,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:09:13,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:09:13,325 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 [2020-10-12 19:09:13,349 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:09:13,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:09:13,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:09:13,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:09:13,351 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:09:13,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:09:13,351 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:09:13,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:09:13,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:09:13,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:09:13,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:09:13,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:09:13,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:09:13,353 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:09:13,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:09:13,353 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:09:13,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:09:13,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:09:13,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:09:13,354 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:09:13,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:09:13,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:09:13,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:09:13,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:09:13,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:09:13,355 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:09:13,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:09:13,356 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:09:13,356 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:09:13,356 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 -> SequenceOfStatements 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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=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;unknown-allowed=true; [2020-10-12 19:09:13,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:09:13,656 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:09:13,660 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:09:13,661 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:09:13,662 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:09:13,662 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 19:09:13,737 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38ff749d1/601c3a83f44f44b39cbb7b52afc02930/FLAGe45c7f8d7 [2020-10-12 19:09:14,179 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:09:14,179 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 19:09:14,192 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38ff749d1/601c3a83f44f44b39cbb7b52afc02930/FLAGe45c7f8d7 [2020-10-12 19:09:14,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38ff749d1/601c3a83f44f44b39cbb7b52afc02930 [2020-10-12 19:09:14,522 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:09:14,523 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:09:14,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:09:14,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:09:14,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:09:14,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:09:14" (1/1) ... [2020-10-12 19:09:14,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79b03bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:14, skipping insertion in model container [2020-10-12 19:09:14,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:09:14" (1/1) ... [2020-10-12 19:09:14,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:09:14,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:09:14,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:09:15,000 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:09:15,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:09:15,116 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:09:15,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:15 WrapperNode [2020-10-12 19:09:15,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:09:15,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:09:15,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:09:15,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:09:15,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:15" (1/1) ... [2020-10-12 19:09:15,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:15" (1/1) ... [2020-10-12 19:09:15,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:15" (1/1) ... [2020-10-12 19:09:15,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:15" (1/1) ... [2020-10-12 19:09:15,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:15" (1/1) ... [2020-10-12 19:09:15,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:15" (1/1) ... [2020-10-12 19:09:15,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:15" (1/1) ... [2020-10-12 19:09:15,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:09:15,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:09:15,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:09:15,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:09:15,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:15" (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 [2020-10-12 19:09:15,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:09:15,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:09:15,247 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:09:15,247 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:09:15,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:09:15,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:09:15,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:09:15,250 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:09:15,250 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:09:15,250 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:09:15,251 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:09:15,251 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:09:15,251 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:09:15,251 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:09:15,251 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:09:15,254 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:09:15,254 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:09:15,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:09:15,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:09:15,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:09:16,022 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:09:16,022 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:09:16,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:09:16 BoogieIcfgContainer [2020-10-12 19:09:16,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:09:16,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:09:16,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:09:16,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:09:16,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:09:14" (1/3) ... [2020-10-12 19:09:16,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b02fb95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:09:16, skipping insertion in model container [2020-10-12 19:09:16,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:09:15" (2/3) ... [2020-10-12 19:09:16,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b02fb95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:09:16, skipping insertion in model container [2020-10-12 19:09:16,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:09:16" (3/3) ... [2020-10-12 19:09:16,046 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 19:09:16,057 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:09:16,068 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:09:16,082 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:09:16,106 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:09:16,106 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:09:16,106 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:09:16,106 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:09:16,107 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:09:16,107 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:09:16,107 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:09:16,107 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:09:16,129 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states. [2020-10-12 19:09:16,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 19:09:16,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:09:16,142 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] [2020-10-12 19:09:16,142 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:09:16,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:09:16,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1817058804, now seen corresponding path program 1 times [2020-10-12 19:09:16,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:09:16,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457979530] [2020-10-12 19:09:16,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:09:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:09:16,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:16,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:16,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:17,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:18,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:09:18,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 19:09:18,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:09:18,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2138 [2020-10-12 19:09:18,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:09:18,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:09:18,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:09:18,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 19:09:18,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 19:09:19,147 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-12 19:09:19,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:09:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:09:19,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:19,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:09:19,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:09:19,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:09:19,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:09:19,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:09:19,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:09:19,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:09:19,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:09:19,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:09:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:09:19,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457979530] [2020-10-12 19:09:19,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:09:19,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:09:19,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311975205] [2020-10-12 19:09:19,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:09:19,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:09:19,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:09:19,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:09:19,237 INFO L87 Difference]: Start difference. First operand 140 states. Second operand 6 states. [2020-10-12 19:09:19,550 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 19:09:20,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:09:20,494 INFO L93 Difference]: Finished difference Result 632 states and 1063 transitions. [2020-10-12 19:09:20,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:09:20,496 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-10-12 19:09:20,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:09:20,515 INFO L225 Difference]: With dead ends: 632 [2020-10-12 19:09:20,515 INFO L226 Difference]: Without dead ends: 526 [2020-10-12 19:09:20,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:09:20,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-10-12 19:09:20,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 212. [2020-10-12 19:09:20,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-12 19:09:20,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 337 transitions. [2020-10-12 19:09:20,607 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 337 transitions. Word has length 61 [2020-10-12 19:09:20,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:09:20,608 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 337 transitions. [2020-10-12 19:09:20,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:09:20,609 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 337 transitions. [2020-10-12 19:09:20,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 19:09:20,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:09:20,618 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] [2020-10-12 19:09:20,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:09:20,619 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:09:20,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:09:20,619 INFO L82 PathProgramCache]: Analyzing trace with hash 432637612, now seen corresponding path program 1 times [2020-10-12 19:09:20,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:09:20,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688208137] [2020-10-12 19:09:20,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:09:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:09:20,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:20,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:20,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:21,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:21,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:23,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:09:23,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 19:09:23,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:09:23,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2546 [2020-10-12 19:09:23,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:09:23,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:09:23,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 19:09:23,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 19:09:23,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:09:23,447 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-12 19:09:23,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:09:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:09:23,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:23,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:09:23,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:09:23,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:09:23,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:09:23,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:09:23,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:09:23,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:09:23,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:09:23,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:09:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:09:23,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688208137] [2020-10-12 19:09:23,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:09:23,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:09:23,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358407761] [2020-10-12 19:09:23,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:09:23,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:09:23,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:09:23,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:09:23,485 INFO L87 Difference]: Start difference. First operand 212 states and 337 transitions. Second operand 7 states. [2020-10-12 19:09:23,798 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-12 19:09:25,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:09:25,184 INFO L93 Difference]: Finished difference Result 1293 states and 2150 transitions. [2020-10-12 19:09:25,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:09:25,184 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-10-12 19:09:25,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:09:25,193 INFO L225 Difference]: With dead ends: 1293 [2020-10-12 19:09:25,194 INFO L226 Difference]: Without dead ends: 1139 [2020-10-12 19:09:25,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:09:25,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-10-12 19:09:25,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 605. [2020-10-12 19:09:25,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2020-10-12 19:09:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 998 transitions. [2020-10-12 19:09:25,277 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 998 transitions. Word has length 62 [2020-10-12 19:09:25,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:09:25,278 INFO L479 AbstractCegarLoop]: Abstraction has 605 states and 998 transitions. [2020-10-12 19:09:25,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:09:25,278 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 998 transitions. [2020-10-12 19:09:25,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 19:09:25,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:09:25,283 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] [2020-10-12 19:09:25,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:09:25,284 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:09:25,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:09:25,284 INFO L82 PathProgramCache]: Analyzing trace with hash 469811643, now seen corresponding path program 1 times [2020-10-12 19:09:25,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:09:25,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821474680] [2020-10-12 19:09:25,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:09:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:09:25,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:25,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:25,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:25,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:25,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:27,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:09:27,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 19:09:27,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:09:27,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2221 [2020-10-12 19:09:27,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:09:27,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:09:27,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:09:27,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 19:09:27,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:09:27,824 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-12 19:09:27,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:09:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:09:27,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:27,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:09:27,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:09:27,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:09:27,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:09:27,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:09:27,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:09:27,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:09:27,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:09:27,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 19:09:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:09:27,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821474680] [2020-10-12 19:09:27,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:09:27,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:09:27,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278476600] [2020-10-12 19:09:27,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:09:27,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:09:27,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:09:27,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:09:27,877 INFO L87 Difference]: Start difference. First operand 605 states and 998 transitions. Second operand 7 states. [2020-10-12 19:09:28,148 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-12 19:09:29,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:09:29,428 INFO L93 Difference]: Finished difference Result 3697 states and 6172 transitions. [2020-10-12 19:09:29,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:09:29,429 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 63 [2020-10-12 19:09:29,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:09:29,451 INFO L225 Difference]: With dead ends: 3697 [2020-10-12 19:09:29,451 INFO L226 Difference]: Without dead ends: 3197 [2020-10-12 19:09:29,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:09:29,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2020-10-12 19:09:29,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 1724. [2020-10-12 19:09:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1724 states. [2020-10-12 19:09:29,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2867 transitions. [2020-10-12 19:09:29,617 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2867 transitions. Word has length 63 [2020-10-12 19:09:29,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:09:29,617 INFO L479 AbstractCegarLoop]: Abstraction has 1724 states and 2867 transitions. [2020-10-12 19:09:29,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:09:29,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2867 transitions. [2020-10-12 19:09:29,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 19:09:29,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:09:29,619 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] [2020-10-12 19:09:29,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:09:29,620 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:09:29,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:09:29,620 INFO L82 PathProgramCache]: Analyzing trace with hash 976019405, now seen corresponding path program 1 times [2020-10-12 19:09:29,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:09:29,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607660434] [2020-10-12 19:09:29,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:09:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:09:29,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:29,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:29,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:29,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:31,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:31,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:34,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:09:34,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 19:09:34,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:09:34,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:09:34,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:09:34,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:09:34,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 19:09:34,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 19:09:34,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:09:34,850 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-12 19:09:34,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:09:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:09:34,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:34,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:09:34,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:09:34,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:09:34,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 19:09:34,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:09:34,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:09:34,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:09:34,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:09:34,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:09:34,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:09:34,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607660434] [2020-10-12 19:09:34,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:09:34,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:09:34,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299929608] [2020-10-12 19:09:34,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:09:34,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:09:34,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:09:34,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:09:34,895 INFO L87 Difference]: Start difference. First operand 1724 states and 2867 transitions. Second operand 6 states. [2020-10-12 19:09:35,135 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-12 19:09:36,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:09:36,286 INFO L93 Difference]: Finished difference Result 6795 states and 11328 transitions. [2020-10-12 19:09:36,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:09:36,286 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-12 19:09:36,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:09:36,317 INFO L225 Difference]: With dead ends: 6795 [2020-10-12 19:09:36,318 INFO L226 Difference]: Without dead ends: 5212 [2020-10-12 19:09:36,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:09:36,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5212 states. [2020-10-12 19:09:36,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5212 to 3367. [2020-10-12 19:09:36,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3367 states. [2020-10-12 19:09:36,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3367 states to 3367 states and 5602 transitions. [2020-10-12 19:09:36,591 INFO L78 Accepts]: Start accepts. Automaton has 3367 states and 5602 transitions. Word has length 64 [2020-10-12 19:09:36,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:09:36,592 INFO L479 AbstractCegarLoop]: Abstraction has 3367 states and 5602 transitions. [2020-10-12 19:09:36,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:09:36,592 INFO L276 IsEmpty]: Start isEmpty. Operand 3367 states and 5602 transitions. [2020-10-12 19:09:36,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 19:09:36,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:09:36,594 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] [2020-10-12 19:09:36,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:09:36,594 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:09:36,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:09:36,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1351417111, now seen corresponding path program 1 times [2020-10-12 19:09:36,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:09:36,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086133841] [2020-10-12 19:09:36,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:09:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:09:36,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:36,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:36,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:36,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:36,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:37,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:37,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:41,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:09:41,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 19:09:41,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:09:41,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 19:09:41,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:09:41,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:09:41,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:09:41,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 19:09:41,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:09:41,884 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-12 19:09:41,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:09:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:09:41,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:41,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:09:41,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:09:41,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:09:41,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:09:41,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:09:41,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:09:41,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:09:41,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:09:41,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:09:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:09:41,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086133841] [2020-10-12 19:09:41,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:09:41,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:09:41,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885239166] [2020-10-12 19:09:41,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:09:41,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:09:41,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:09:41,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:09:41,927 INFO L87 Difference]: Start difference. First operand 3367 states and 5602 transitions. Second operand 6 states. [2020-10-12 19:09:42,217 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-12 19:09:43,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:09:43,631 INFO L93 Difference]: Finished difference Result 9152 states and 15214 transitions. [2020-10-12 19:09:43,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:09:43,632 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-12 19:09:43,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:09:43,670 INFO L225 Difference]: With dead ends: 9152 [2020-10-12 19:09:43,670 INFO L226 Difference]: Without dead ends: 7241 [2020-10-12 19:09:43,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:09:43,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7241 states. [2020-10-12 19:09:44,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7241 to 5273. [2020-10-12 19:09:44,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5273 states. [2020-10-12 19:09:44,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5273 states to 5273 states and 8780 transitions. [2020-10-12 19:09:44,062 INFO L78 Accepts]: Start accepts. Automaton has 5273 states and 8780 transitions. Word has length 64 [2020-10-12 19:09:44,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:09:44,063 INFO L479 AbstractCegarLoop]: Abstraction has 5273 states and 8780 transitions. [2020-10-12 19:09:44,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:09:44,063 INFO L276 IsEmpty]: Start isEmpty. Operand 5273 states and 8780 transitions. [2020-10-12 19:09:44,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 19:09:44,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:09:44,065 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] [2020-10-12 19:09:44,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:09:44,065 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:09:44,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:09:44,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1626764627, now seen corresponding path program 1 times [2020-10-12 19:09:44,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:09:44,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455135928] [2020-10-12 19:09:44,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:09:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:09:44,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:44,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:44,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:44,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:44,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:45,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:09:45,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 19:09:45,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:09:45,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1527 [2020-10-12 19:09:45,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:09:45,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:09:45,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:09:45,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 19:09:45,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:09:45,883 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-12 19:09:45,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:09:45,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:09:45,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:45,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:09:45,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:09:45,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:09:45,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:09:45,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:09:45,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:09:45,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:09:45,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:09:45,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:09:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:09:45,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455135928] [2020-10-12 19:09:45,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:09:45,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:09:45,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219090601] [2020-10-12 19:09:45,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:09:45,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:09:45,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:09:45,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:09:45,927 INFO L87 Difference]: Start difference. First operand 5273 states and 8780 transitions. Second operand 7 states. [2020-10-12 19:09:46,175 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-12 19:09:48,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:09:48,074 INFO L93 Difference]: Finished difference Result 24460 states and 40669 transitions. [2020-10-12 19:09:48,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:09:48,074 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-10-12 19:09:48,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:09:48,141 INFO L225 Difference]: With dead ends: 24460 [2020-10-12 19:09:48,141 INFO L226 Difference]: Without dead ends: 19328 [2020-10-12 19:09:48,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:09:48,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19328 states. [2020-10-12 19:09:49,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19328 to 14825. [2020-10-12 19:09:49,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14825 states. [2020-10-12 19:09:49,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14825 states to 14825 states and 24567 transitions. [2020-10-12 19:09:49,174 INFO L78 Accepts]: Start accepts. Automaton has 14825 states and 24567 transitions. Word has length 64 [2020-10-12 19:09:49,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:09:49,175 INFO L479 AbstractCegarLoop]: Abstraction has 14825 states and 24567 transitions. [2020-10-12 19:09:49,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:09:49,175 INFO L276 IsEmpty]: Start isEmpty. Operand 14825 states and 24567 transitions. [2020-10-12 19:09:49,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 19:09:49,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:09:49,177 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] [2020-10-12 19:09:49,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:09:49,178 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:09:49,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:09:49,178 INFO L82 PathProgramCache]: Analyzing trace with hash 623095309, now seen corresponding path program 1 times [2020-10-12 19:09:49,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:09:49,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520979544] [2020-10-12 19:09:49,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:09:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:09:49,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:49,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:49,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:49,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:49,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:49,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:50,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:54,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:09:54,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 19:09:54,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:09:54,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:09:54,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:09:54,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:09:54,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:09:54,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 19:09:54,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:09:54,425 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-12 19:09:54,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:09:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:09:54,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:54,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:09:54,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:09:54,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:09:54,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:09:54,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:09:54,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:09:54,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:09:54,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:09:54,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:09:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:09:54,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520979544] [2020-10-12 19:09:54,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:09:54,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:09:54,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334895637] [2020-10-12 19:09:54,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:09:54,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:09:54,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:09:54,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:09:54,455 INFO L87 Difference]: Start difference. First operand 14825 states and 24567 transitions. Second operand 6 states. [2020-10-12 19:09:54,648 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-12 19:09:56,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:09:56,250 INFO L93 Difference]: Finished difference Result 28986 states and 47999 transitions. [2020-10-12 19:09:56,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:09:56,250 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-12 19:09:56,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:09:56,318 INFO L225 Difference]: With dead ends: 28986 [2020-10-12 19:09:56,319 INFO L226 Difference]: Without dead ends: 23686 [2020-10-12 19:09:56,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:09:56,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23686 states. [2020-10-12 19:09:57,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23686 to 18523. [2020-10-12 19:09:57,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18523 states. [2020-10-12 19:09:57,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18523 states to 18523 states and 30691 transitions. [2020-10-12 19:09:57,996 INFO L78 Accepts]: Start accepts. Automaton has 18523 states and 30691 transitions. Word has length 64 [2020-10-12 19:09:57,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:09:57,996 INFO L479 AbstractCegarLoop]: Abstraction has 18523 states and 30691 transitions. [2020-10-12 19:09:57,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:09:57,997 INFO L276 IsEmpty]: Start isEmpty. Operand 18523 states and 30691 transitions. [2020-10-12 19:09:57,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:09:57,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:09:57,998 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] [2020-10-12 19:09:57,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:09:57,999 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:09:57,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:09:57,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1199826022, now seen corresponding path program 1 times [2020-10-12 19:09:58,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:09:58,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151323172] [2020-10-12 19:09:58,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:09:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:09:58,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:58,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:58,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:58,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:58,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:58,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:09:59,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:02,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:02,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:10:02,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:10:02,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4411 [2020-10-12 19:10:02,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:02,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:10:02,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:10:02,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 19:10:02,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:10:02,738 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-12 19:10:02,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:10:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:02,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:02,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:02,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:10:02,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:10:02,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:10:02,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:02,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:10:02,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:10:02,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:10:02,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:10:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:10:02,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151323172] [2020-10-12 19:10:02,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:10:02,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:10:02,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392019610] [2020-10-12 19:10:02,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:10:02,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:10:02,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:10:02,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:10:02,774 INFO L87 Difference]: Start difference. First operand 18523 states and 30691 transitions. Second operand 5 states. [2020-10-12 19:10:05,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:10:05,459 INFO L93 Difference]: Finished difference Result 54167 states and 89835 transitions. [2020-10-12 19:10:05,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:10:05,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-12 19:10:05,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:10:05,546 INFO L225 Difference]: With dead ends: 54167 [2020-10-12 19:10:05,547 INFO L226 Difference]: Without dead ends: 35669 [2020-10-12 19:10:05,588 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 [2020-10-12 19:10:05,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35669 states. [2020-10-12 19:10:07,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35669 to 35667. [2020-10-12 19:10:07,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35667 states. [2020-10-12 19:10:07,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35667 states to 35667 states and 58645 transitions. [2020-10-12 19:10:07,982 INFO L78 Accepts]: Start accepts. Automaton has 35667 states and 58645 transitions. Word has length 65 [2020-10-12 19:10:07,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:10:07,982 INFO L479 AbstractCegarLoop]: Abstraction has 35667 states and 58645 transitions. [2020-10-12 19:10:07,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:10:07,982 INFO L276 IsEmpty]: Start isEmpty. Operand 35667 states and 58645 transitions. [2020-10-12 19:10:07,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:10:07,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:10:07,984 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] [2020-10-12 19:10:07,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:10:07,985 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:10:07,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:10:07,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1117352983, now seen corresponding path program 1 times [2020-10-12 19:10:07,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:10:07,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661235838] [2020-10-12 19:10:07,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:10:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:08,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:08,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:08,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:08,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:08,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:08,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:09,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:09,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:13,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:13,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:10:13,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:10:13,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:10:13,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:13,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:10:13,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 19:10:13,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 19:10:13,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:10:13,220 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-12 19:10:13,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:10:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:13,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:13,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:13,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:10:13,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:10:13,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:10:13,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:13,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:10:13,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:10:13,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:10:13,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:10:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:10:13,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661235838] [2020-10-12 19:10:13,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:10:13,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:10:13,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136122744] [2020-10-12 19:10:13,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:10:13,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:10:13,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:10:13,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:10:13,252 INFO L87 Difference]: Start difference. First operand 35667 states and 58645 transitions. Second operand 7 states. [2020-10-12 19:10:13,465 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-12 19:10:18,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:10:18,963 INFO L93 Difference]: Finished difference Result 74491 states and 122559 transitions. [2020-10-12 19:10:18,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:10:18,964 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-10-12 19:10:18,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:10:19,076 INFO L225 Difference]: With dead ends: 74491 [2020-10-12 19:10:19,077 INFO L226 Difference]: Without dead ends: 57096 [2020-10-12 19:10:19,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:10:19,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57096 states. [2020-10-12 19:10:22,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57096 to 44871. [2020-10-12 19:10:22,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44871 states. [2020-10-12 19:10:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44871 states to 44871 states and 73818 transitions. [2020-10-12 19:10:22,128 INFO L78 Accepts]: Start accepts. Automaton has 44871 states and 73818 transitions. Word has length 65 [2020-10-12 19:10:22,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:10:22,128 INFO L479 AbstractCegarLoop]: Abstraction has 44871 states and 73818 transitions. [2020-10-12 19:10:22,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:10:22,128 INFO L276 IsEmpty]: Start isEmpty. Operand 44871 states and 73818 transitions. [2020-10-12 19:10:22,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:10:22,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:10:22,131 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] [2020-10-12 19:10:22,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:10:22,131 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:10:22,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:10:22,132 INFO L82 PathProgramCache]: Analyzing trace with hash 2074474931, now seen corresponding path program 1 times [2020-10-12 19:10:22,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:10:22,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740356484] [2020-10-12 19:10:22,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:10:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:22,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:22,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:22,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:22,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:22,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:22,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:23,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:23,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:27,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:27,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:10:27,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:10:27,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:10:27,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:27,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:10:27,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 19:10:27,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 19:10:27,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:10:27,348 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-12 19:10:27,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:10:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:27,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:27,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:27,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:10:27,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:10:27,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:10:27,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:27,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:10:27,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:10:27,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:10:27,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:10:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:10:27,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740356484] [2020-10-12 19:10:27,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:10:27,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:10:27,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345750248] [2020-10-12 19:10:27,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:10:27,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:10:27,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:10:27,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:10:27,371 INFO L87 Difference]: Start difference. First operand 44871 states and 73818 transitions. Second operand 7 states. [2020-10-12 19:10:27,572 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-12 19:10:33,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:10:33,269 INFO L93 Difference]: Finished difference Result 80405 states and 132264 transitions. [2020-10-12 19:10:33,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:10:33,269 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-10-12 19:10:33,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:10:33,386 INFO L225 Difference]: With dead ends: 80405 [2020-10-12 19:10:33,386 INFO L226 Difference]: Without dead ends: 63070 [2020-10-12 19:10:33,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:10:33,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63070 states. [2020-10-12 19:10:36,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63070 to 51249. [2020-10-12 19:10:36,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51249 states. [2020-10-12 19:10:36,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51249 states to 51249 states and 84311 transitions. [2020-10-12 19:10:36,825 INFO L78 Accepts]: Start accepts. Automaton has 51249 states and 84311 transitions. Word has length 65 [2020-10-12 19:10:36,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:10:36,825 INFO L479 AbstractCegarLoop]: Abstraction has 51249 states and 84311 transitions. [2020-10-12 19:10:36,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:10:36,825 INFO L276 IsEmpty]: Start isEmpty. Operand 51249 states and 84311 transitions. [2020-10-12 19:10:36,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:10:36,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:10:36,827 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] [2020-10-12 19:10:36,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:10:36,827 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:10:36,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:10:36,828 INFO L82 PathProgramCache]: Analyzing trace with hash 2065591486, now seen corresponding path program 1 times [2020-10-12 19:10:36,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:10:36,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989191586] [2020-10-12 19:10:36,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:10:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:36,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:36,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:36,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:36,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:37,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:37,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:38,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:38,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:10:38,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:10:38,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1607 [2020-10-12 19:10:38,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:38,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:10:38,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:10:38,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 19:10:38,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:10:38,791 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-12 19:10:38,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:10:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:38,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:38,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:38,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:10:38,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:10:38,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:10:38,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:38,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:10:38,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:10:38,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:10:38,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:10:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:10:38,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989191586] [2020-10-12 19:10:38,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:10:38,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:10:38,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661653119] [2020-10-12 19:10:38,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:10:38,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:10:38,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:10:38,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:10:38,810 INFO L87 Difference]: Start difference. First operand 51249 states and 84311 transitions. Second operand 5 states. [2020-10-12 19:10:39,001 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-12 19:10:44,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:10:44,046 INFO L93 Difference]: Finished difference Result 92417 states and 152015 transitions. [2020-10-12 19:10:44,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:10:44,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-12 19:10:44,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:10:44,131 INFO L225 Difference]: With dead ends: 92417 [2020-10-12 19:10:44,131 INFO L226 Difference]: Without dead ends: 58232 [2020-10-12 19:10:44,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:10:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58232 states. [2020-10-12 19:10:47,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58232 to 54862. [2020-10-12 19:10:47,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54862 states. [2020-10-12 19:10:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54862 states to 54862 states and 90539 transitions. [2020-10-12 19:10:47,961 INFO L78 Accepts]: Start accepts. Automaton has 54862 states and 90539 transitions. Word has length 66 [2020-10-12 19:10:47,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:10:47,961 INFO L479 AbstractCegarLoop]: Abstraction has 54862 states and 90539 transitions. [2020-10-12 19:10:47,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:10:47,961 INFO L276 IsEmpty]: Start isEmpty. Operand 54862 states and 90539 transitions. [2020-10-12 19:10:47,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:10:47,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:10:47,964 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] [2020-10-12 19:10:47,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:10:47,964 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:10:47,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:10:47,964 INFO L82 PathProgramCache]: Analyzing trace with hash -769609829, now seen corresponding path program 1 times [2020-10-12 19:10:47,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:10:47,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256036176] [2020-10-12 19:10:47,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:10:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:47,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:48,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:48,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:48,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:48,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:48,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:48,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:50,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:53,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:53,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:10:53,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:10:53,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5888 [2020-10-12 19:10:53,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:53,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:10:53,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 19:10:53,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 19:10:53,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:10:54,078 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-12 19:10:54,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:10:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:54,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:54,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:54,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:10:54,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:10:54,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:10:54,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:54,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:10:54,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:10:54,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:10:54,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:10:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:10:54,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256036176] [2020-10-12 19:10:54,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:10:54,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:10:54,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628234978] [2020-10-12 19:10:54,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:10:54,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:10:54,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:10:54,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:10:54,106 INFO L87 Difference]: Start difference. First operand 54862 states and 90539 transitions. Second operand 5 states. [2020-10-12 19:10:54,309 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-12 19:11:02,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:11:02,903 INFO L93 Difference]: Finished difference Result 173807 states and 286091 transitions. [2020-10-12 19:11:02,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:11:02,904 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-12 19:11:02,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:11:03,097 INFO L225 Difference]: With dead ends: 173807 [2020-10-12 19:11:03,097 INFO L226 Difference]: Without dead ends: 119150 [2020-10-12 19:11:03,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:11:03,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119150 states. [2020-10-12 19:11:13,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119150 to 118908. [2020-10-12 19:11:13,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118908 states. [2020-10-12 19:11:14,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118908 states to 118908 states and 193812 transitions. [2020-10-12 19:11:14,108 INFO L78 Accepts]: Start accepts. Automaton has 118908 states and 193812 transitions. Word has length 66 [2020-10-12 19:11:14,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:11:14,108 INFO L479 AbstractCegarLoop]: Abstraction has 118908 states and 193812 transitions. [2020-10-12 19:11:14,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:11:14,109 INFO L276 IsEmpty]: Start isEmpty. Operand 118908 states and 193812 transitions. [2020-10-12 19:11:14,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 19:11:14,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:11:14,111 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] [2020-10-12 19:11:14,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:11:14,111 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:11:14,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:11:14,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1281819451, now seen corresponding path program 1 times [2020-10-12 19:11:14,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:11:14,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125557638] [2020-10-12 19:11:14,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:11:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:14,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:14,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:14,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:14,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:14,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:14,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:15,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:17,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:17,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 19:11:17,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:11:17,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2911 [2020-10-12 19:11:17,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:17,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:11:17,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:11:17,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 19:11:17,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:17,271 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-12 19:11:17,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:11:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:17,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:17,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:17,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:11:17,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:11:17,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:11:17,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:17,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:11:17,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:11:17,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:11:17,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:11:17,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125557638] [2020-10-12 19:11:17,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:11:17,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:11:17,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049445159] [2020-10-12 19:11:17,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:11:17,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:11:17,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:11:17,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:11:17,295 INFO L87 Difference]: Start difference. First operand 118908 states and 193812 transitions. Second operand 6 states. [2020-10-12 19:11:17,739 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-12 19:11:29,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:11:29,233 INFO L93 Difference]: Finished difference Result 233265 states and 380293 transitions. [2020-10-12 19:11:29,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:11:29,234 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-12 19:11:29,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:11:29,407 INFO L225 Difference]: With dead ends: 233265 [2020-10-12 19:11:29,407 INFO L226 Difference]: Without dead ends: 118918 [2020-10-12 19:11:29,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:11:29,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118918 states. [2020-10-12 19:11:38,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118918 to 118908. [2020-10-12 19:11:38,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118908 states. [2020-10-12 19:11:38,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118908 states to 118908 states and 193470 transitions. [2020-10-12 19:11:38,629 INFO L78 Accepts]: Start accepts. Automaton has 118908 states and 193470 transitions. Word has length 68 [2020-10-12 19:11:38,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:11:38,630 INFO L479 AbstractCegarLoop]: Abstraction has 118908 states and 193470 transitions. [2020-10-12 19:11:38,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:11:38,630 INFO L276 IsEmpty]: Start isEmpty. Operand 118908 states and 193470 transitions. [2020-10-12 19:11:38,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 19:11:38,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:11:38,632 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] [2020-10-12 19:11:38,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:11:38,632 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:11:38,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:11:38,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1649062036, now seen corresponding path program 1 times [2020-10-12 19:11:38,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:11:38,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647669823] [2020-10-12 19:11:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:11:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:38,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:38,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:38,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:38,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:38,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:38,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:39,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:39,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:43,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:43,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 19:11:43,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:11:43,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:11:43,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:43,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:11:43,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:11:43,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 19:11:43,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:43,870 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-12 19:11:43,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:11:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:43,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:43,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:43,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:11:43,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:11:43,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:11:43,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:43,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:11:43,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:11:43,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:11:43,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:11:43,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647669823] [2020-10-12 19:11:43,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:11:43,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:11:43,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087014942] [2020-10-12 19:11:43,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:11:43,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:11:43,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:11:43,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:11:43,894 INFO L87 Difference]: Start difference. First operand 118908 states and 193470 transitions. Second operand 5 states. [2020-10-12 19:12:03,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:12:03,870 INFO L93 Difference]: Finished difference Result 347454 states and 565861 transitions. [2020-10-12 19:12:03,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:12:03,871 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-12 19:12:03,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:12:04,269 INFO L225 Difference]: With dead ends: 347454 [2020-10-12 19:12:04,269 INFO L226 Difference]: Without dead ends: 228775 [2020-10-12 19:12:04,384 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 [2020-10-12 19:12:04,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228775 states. [2020-10-12 19:12:27,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228775 to 228773. [2020-10-12 19:12:27,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228773 states. [2020-10-12 19:12:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228773 states to 228773 states and 369514 transitions. [2020-10-12 19:12:28,363 INFO L78 Accepts]: Start accepts. Automaton has 228773 states and 369514 transitions. Word has length 68 [2020-10-12 19:12:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:12:28,364 INFO L479 AbstractCegarLoop]: Abstraction has 228773 states and 369514 transitions. [2020-10-12 19:12:28,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:12:28,364 INFO L276 IsEmpty]: Start isEmpty. Operand 228773 states and 369514 transitions. [2020-10-12 19:12:28,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:12:28,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:12:28,367 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] [2020-10-12 19:12:28,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:12:28,368 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:12:28,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:12:28,368 INFO L82 PathProgramCache]: Analyzing trace with hash 455304601, now seen corresponding path program 1 times [2020-10-12 19:12:28,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:12:28,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076165722] [2020-10-12 19:12:28,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:12:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:28,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:28,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:28,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:28,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:28,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:28,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:28,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:30,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:30,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:33,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:33,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:12:33,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:12:33,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 19:12:33,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:33,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:12:33,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:12:33,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 19:12:33,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:33,588 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-12 19:12:33,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:12:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:33,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:33,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:33,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:12:33,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:12:33,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:12:33,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:33,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:12:33,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:12:33,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:12:33,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:12:33,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076165722] [2020-10-12 19:12:33,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:12:33,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:12:33,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479516718] [2020-10-12 19:12:33,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:12:33,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:12:33,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:12:33,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:12:33,609 INFO L87 Difference]: Start difference. First operand 228773 states and 369514 transitions. Second operand 7 states. [2020-10-12 19:12:33,810 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 162