/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 08:20:03,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 08:20:03,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 08:20:03,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 08:20:03,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 08:20:03,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 08:20:03,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 08:20:03,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 08:20:03,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 08:20:03,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 08:20:03,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 08:20:03,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 08:20:03,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 08:20:03,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 08:20:03,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 08:20:03,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 08:20:03,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 08:20:03,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 08:20:03,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 08:20:03,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 08:20:03,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 08:20:03,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 08:20:03,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 08:20:03,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 08:20:03,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 08:20:03,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 08:20:03,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 08:20:03,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 08:20:03,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 08:20:03,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 08:20:03,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 08:20:03,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 08:20:03,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 08:20:03,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 08:20:03,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 08:20:03,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 08:20:03,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 08:20:03,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 08:20:03,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 08:20:03,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 08:20:03,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 08:20:03,275 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 [2020-10-14 08:20:03,314 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 08:20:03,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 08:20:03,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 08:20:03,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 08:20:03,318 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 08:20:03,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 08:20:03,318 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 08:20:03,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 08:20:03,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 08:20:03,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 08:20:03,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 08:20:03,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 08:20:03,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 08:20:03,320 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 08:20:03,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 08:20:03,322 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 08:20:03,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 08:20:03,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 08:20:03,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 08:20:03,322 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 08:20:03,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 08:20:03,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:20:03,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 08:20:03,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 08:20:03,324 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 08:20:03,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 08:20:03,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 08:20:03,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 08:20:03,324 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 08:20:03,325 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 08:20:03,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 08:20:03,662 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 08:20:03,666 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 08:20:03,668 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 08:20:03,668 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 08:20:03,669 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:20:03,739 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90756acbc/22ffb49440004ff7b6052fa7e35f46ef/FLAGa47d5315c [2020-10-14 08:20:04,212 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 08:20:04,212 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:20:04,225 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90756acbc/22ffb49440004ff7b6052fa7e35f46ef/FLAGa47d5315c [2020-10-14 08:20:04,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90756acbc/22ffb49440004ff7b6052fa7e35f46ef [2020-10-14 08:20:04,615 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 08:20:04,617 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 08:20:04,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 08:20:04,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 08:20:04,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 08:20:04,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:20:04" (1/1) ... [2020-10-14 08:20:04,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4122bc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:04, skipping insertion in model container [2020-10-14 08:20:04,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:20:04" (1/1) ... [2020-10-14 08:20:04,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 08:20:04,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 08:20:04,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:20:05,116 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 08:20:05,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:20:05,228 INFO L208 MainTranslator]: Completed translation [2020-10-14 08:20:05,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:05 WrapperNode [2020-10-14 08:20:05,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 08:20:05,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 08:20:05,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 08:20:05,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 08:20:05,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:05" (1/1) ... [2020-10-14 08:20:05,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:05" (1/1) ... [2020-10-14 08:20:05,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:05" (1/1) ... [2020-10-14 08:20:05,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:05" (1/1) ... [2020-10-14 08:20:05,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:05" (1/1) ... [2020-10-14 08:20:05,285 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:05" (1/1) ... [2020-10-14 08:20:05,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:05" (1/1) ... [2020-10-14 08:20:05,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 08:20:05,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 08:20:05,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 08:20:05,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 08:20:05,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:05" (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 [2020-10-14 08:20:05,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 08:20:05,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 08:20:05,359 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 08:20:05,359 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 08:20:05,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 08:20:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 08:20:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-14 08:20:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 08:20:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 08:20:05,360 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 08:20:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 08:20:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 08:20:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 08:20:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 08:20:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 08:20:05,361 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 08:20:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 08:20:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 08:20:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 08:20:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 08:20:05,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 08:20:06,196 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 08:20:06,197 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 08:20:06,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:20:06 BoogieIcfgContainer [2020-10-14 08:20:06,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 08:20:06,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 08:20:06,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 08:20:06,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 08:20:06,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:20:04" (1/3) ... [2020-10-14 08:20:06,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130499fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:20:06, skipping insertion in model container [2020-10-14 08:20:06,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:20:05" (2/3) ... [2020-10-14 08:20:06,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130499fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:20:06, skipping insertion in model container [2020-10-14 08:20:06,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:20:06" (3/3) ... [2020-10-14 08:20:06,212 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:20:06,224 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 08:20:06,233 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 08:20:06,248 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 08:20:06,278 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 08:20:06,278 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 08:20:06,279 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 08:20:06,279 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 08:20:06,279 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 08:20:06,279 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 08:20:06,280 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 08:20:06,280 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 08:20:06,304 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states. [2020-10-14 08:20:06,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 08:20:06,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:20:06,316 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] [2020-10-14 08:20:06,317 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:20:06,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:20:06,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1611542725, now seen corresponding path program 1 times [2020-10-14 08:20:06,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:20:06,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813315405] [2020-10-14 08:20:06,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:20:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:06,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:06,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:07,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:07,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:08,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:08,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 08:20:08,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:20:08,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1936 [2020-10-14 08:20:08,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:08,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:08,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:20:08,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 08:20:08,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 08:20:08,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 08:20:09,030 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:20:09,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:20:09,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:09,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:09,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:09,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:20:09,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:20:09,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 08:20:09,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:09,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:09,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:20:09,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:20:09,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:20:09,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:20:09,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813315405] [2020-10-14 08:20:09,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:20:09,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:20:09,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475051890] [2020-10-14 08:20:09,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:20:09,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:20:09,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:20:09,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:20:09,102 INFO L87 Difference]: Start difference. First operand 145 states. Second operand 4 states. [2020-10-14 08:20:09,353 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:20:10,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:20:10,124 INFO L93 Difference]: Finished difference Result 312 states and 523 transitions. [2020-10-14 08:20:10,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:20:10,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-14 08:20:10,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:20:10,143 INFO L225 Difference]: With dead ends: 312 [2020-10-14 08:20:10,143 INFO L226 Difference]: Without dead ends: 217 [2020-10-14 08:20:10,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:20:10,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-14 08:20:10,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 214. [2020-10-14 08:20:10,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-14 08:20:10,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 339 transitions. [2020-10-14 08:20:10,222 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 339 transitions. Word has length 60 [2020-10-14 08:20:10,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:20:10,223 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 339 transitions. [2020-10-14 08:20:10,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:20:10,224 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 339 transitions. [2020-10-14 08:20:10,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 08:20:10,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:20:10,227 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] [2020-10-14 08:20:10,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 08:20:10,227 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:20:10,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:20:10,228 INFO L82 PathProgramCache]: Analyzing trace with hash -536473390, now seen corresponding path program 1 times [2020-10-14 08:20:10,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:20:10,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059556529] [2020-10-14 08:20:10,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:20:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:10,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:10,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:10,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:10,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:11,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:14,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:14,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 08:20:14,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 08:20:14,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3976 [2020-10-14 08:20:14,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:14,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:14,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:20:14,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 08:20:14,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 08:20:14,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:14,472 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:20:14,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:20:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:14,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:14,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:14,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:20:14,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:20:14,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:20:14,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:14,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:14,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:20:14,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:20:14,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:20:14,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:20:14,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059556529] [2020-10-14 08:20:14,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:20:14,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:20:14,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691226749] [2020-10-14 08:20:14,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:20:14,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:20:14,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:20:14,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:20:14,513 INFO L87 Difference]: Start difference. First operand 214 states and 339 transitions. Second operand 4 states. [2020-10-14 08:20:14,718 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:20:15,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:20:15,481 INFO L93 Difference]: Finished difference Result 512 states and 839 transitions. [2020-10-14 08:20:15,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:20:15,482 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-14 08:20:15,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:20:15,486 INFO L225 Difference]: With dead ends: 512 [2020-10-14 08:20:15,486 INFO L226 Difference]: Without dead ends: 356 [2020-10-14 08:20:15,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:20:15,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-14 08:20:15,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 352. [2020-10-14 08:20:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-14 08:20:15,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 569 transitions. [2020-10-14 08:20:15,547 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 569 transitions. Word has length 62 [2020-10-14 08:20:15,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:20:15,548 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 569 transitions. [2020-10-14 08:20:15,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:20:15,548 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 569 transitions. [2020-10-14 08:20:15,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 08:20:15,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:20:15,556 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] [2020-10-14 08:20:15,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 08:20:15,556 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:20:15,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:20:15,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1824743771, now seen corresponding path program 1 times [2020-10-14 08:20:15,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:20:15,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173584695] [2020-10-14 08:20:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:20:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:15,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:15,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:15,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:15,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:16,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:16,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:20,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:20,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 08:20:20,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:20:20,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 08:20:20,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:20,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:20,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:20:20,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 08:20:20,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 08:20:20,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:20,800 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:20:20,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:20:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:20,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:20,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:20,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:20:20,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:20:20,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 08:20:20,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:20,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:20,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:20:20,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:20:20,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:20:20,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:20:20,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173584695] [2020-10-14 08:20:20,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:20:20,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:20:20,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150855621] [2020-10-14 08:20:20,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:20:20,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:20:20,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:20:20,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:20:20,837 INFO L87 Difference]: Start difference. First operand 352 states and 569 transitions. Second operand 4 states. [2020-10-14 08:20:21,026 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:20:21,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:20:21,667 INFO L93 Difference]: Finished difference Result 904 states and 1487 transitions. [2020-10-14 08:20:21,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:20:21,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-14 08:20:21,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:20:21,673 INFO L225 Difference]: With dead ends: 904 [2020-10-14 08:20:21,674 INFO L226 Difference]: Without dead ends: 610 [2020-10-14 08:20:21,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:20:21,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-10-14 08:20:21,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 604. [2020-10-14 08:20:21,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2020-10-14 08:20:21,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 965 transitions. [2020-10-14 08:20:21,724 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 965 transitions. Word has length 64 [2020-10-14 08:20:21,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:20:21,727 INFO L479 AbstractCegarLoop]: Abstraction has 604 states and 965 transitions. [2020-10-14 08:20:21,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:20:21,727 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 965 transitions. [2020-10-14 08:20:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 08:20:21,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:20:21,730 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] [2020-10-14 08:20:21,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 08:20:21,731 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:20:21,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:20:21,736 INFO L82 PathProgramCache]: Analyzing trace with hash -82593166, now seen corresponding path program 1 times [2020-10-14 08:20:21,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:20:21,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335452193] [2020-10-14 08:20:21,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:20:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:21,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:21,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:21,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:22,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:22,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:24,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:24,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:26,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:26,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 08:20:26,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:20:26,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 08:20:26,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:26,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:26,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:20:26,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:20:26,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 08:20:26,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:27,078 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:20:27,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:20:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:27,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:27,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:27,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:20:27,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:20:27,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:20:27,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:27,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:27,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:20:27,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:20:27,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:20:27,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:20:27,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335452193] [2020-10-14 08:20:27,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:20:27,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:20:27,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925481582] [2020-10-14 08:20:27,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:20:27,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:20:27,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:20:27,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:20:27,120 INFO L87 Difference]: Start difference. First operand 604 states and 965 transitions. Second operand 5 states. [2020-10-14 08:20:28,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:20:28,140 INFO L93 Difference]: Finished difference Result 1708 states and 2749 transitions. [2020-10-14 08:20:28,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:20:28,141 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-14 08:20:28,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:20:28,147 INFO L225 Difference]: With dead ends: 1708 [2020-10-14 08:20:28,148 INFO L226 Difference]: Without dead ends: 1162 [2020-10-14 08:20:28,150 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 [2020-10-14 08:20:28,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-10-14 08:20:28,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1160. [2020-10-14 08:20:28,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-10-14 08:20:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1847 transitions. [2020-10-14 08:20:28,236 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1847 transitions. Word has length 66 [2020-10-14 08:20:28,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:20:28,236 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1847 transitions. [2020-10-14 08:20:28,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:20:28,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1847 transitions. [2020-10-14 08:20:28,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 08:20:28,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:20:28,239 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] [2020-10-14 08:20:28,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 08:20:28,239 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:20:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:20:28,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1006683073, now seen corresponding path program 1 times [2020-10-14 08:20:28,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:20:28,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913550220] [2020-10-14 08:20:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:20:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:28,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:28,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:28,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:28,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:28,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:28,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:29,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:31,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:33,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:33,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 08:20:33,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:20:33,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:20:33,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:33,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:33,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:20:33,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 08:20:33,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 08:20:33,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:33,540 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:20:33,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:20:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:33,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:33,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:33,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:20:33,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:20:33,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:20:33,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:33,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:33,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:20:33,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:20:33,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:20:33,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:20:33,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913550220] [2020-10-14 08:20:33,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:20:33,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:20:33,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152016617] [2020-10-14 08:20:33,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:20:33,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:20:33,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:20:33,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:20:33,578 INFO L87 Difference]: Start difference. First operand 1160 states and 1847 transitions. Second operand 4 states. [2020-10-14 08:20:34,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:20:34,371 INFO L93 Difference]: Finished difference Result 3390 states and 5391 transitions. [2020-10-14 08:20:34,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:20:34,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 08:20:34,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:20:34,384 INFO L225 Difference]: With dead ends: 3390 [2020-10-14 08:20:34,384 INFO L226 Difference]: Without dead ends: 2278 [2020-10-14 08:20:34,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:20:34,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2020-10-14 08:20:34,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 1166. [2020-10-14 08:20:34,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1166 states. [2020-10-14 08:20:34,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1855 transitions. [2020-10-14 08:20:34,519 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1855 transitions. Word has length 67 [2020-10-14 08:20:34,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:20:34,520 INFO L479 AbstractCegarLoop]: Abstraction has 1166 states and 1855 transitions. [2020-10-14 08:20:34,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:20:34,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1855 transitions. [2020-10-14 08:20:34,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 08:20:34,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:20:34,523 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] [2020-10-14 08:20:34,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 08:20:34,524 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:20:34,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:20:34,524 INFO L82 PathProgramCache]: Analyzing trace with hash 43240883, now seen corresponding path program 1 times [2020-10-14 08:20:34,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:20:34,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624688610] [2020-10-14 08:20:34,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:20:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:34,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:34,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:34,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:34,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:34,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:36,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:36,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:39,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:39,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 08:20:39,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:20:39,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 08:20:39,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:39,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:39,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:20:39,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:20:39,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 08:20:39,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:20:39,833 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:20:39,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:20:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:39,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:39,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:39,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:20:39,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:20:39,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 08:20:39,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:39,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:39,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:20:39,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:20:39,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:20:39,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:20:39,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624688610] [2020-10-14 08:20:39,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:20:39,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:20:39,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872078950] [2020-10-14 08:20:39,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:20:39,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:20:39,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:20:39,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:20:39,893 INFO L87 Difference]: Start difference. First operand 1166 states and 1855 transitions. Second operand 5 states. [2020-10-14 08:20:40,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:20:40,975 INFO L93 Difference]: Finished difference Result 3378 states and 5375 transitions. [2020-10-14 08:20:40,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:20:40,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-14 08:20:40,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:20:40,987 INFO L225 Difference]: With dead ends: 3378 [2020-10-14 08:20:40,988 INFO L226 Difference]: Without dead ends: 2237 [2020-10-14 08:20:41,009 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 [2020-10-14 08:20:41,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2020-10-14 08:20:41,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 2235. [2020-10-14 08:20:41,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2235 states. [2020-10-14 08:20:41,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 3531 transitions. [2020-10-14 08:20:41,159 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 3531 transitions. Word has length 68 [2020-10-14 08:20:41,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:20:41,159 INFO L479 AbstractCegarLoop]: Abstraction has 2235 states and 3531 transitions. [2020-10-14 08:20:41,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:20:41,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 3531 transitions. [2020-10-14 08:20:41,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 08:20:41,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:20:41,162 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] [2020-10-14 08:20:41,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 08:20:41,163 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:20:41,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:20:41,163 INFO L82 PathProgramCache]: Analyzing trace with hash -700964608, now seen corresponding path program 1 times [2020-10-14 08:20:41,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:20:41,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5120019] [2020-10-14 08:20:41,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:20:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:41,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:41,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:41,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:41,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:41,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:41,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:43,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:45,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:46,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:46,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 08:20:46,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:20:46,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 08:20:46,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:46,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:46,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:20:46,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 08:20:46,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 08:20:46,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:20:46,374 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:20:46,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:20:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:46,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:46,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:46,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:20:46,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:20:46,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:20:46,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:46,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:46,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:20:46,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:20:46,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:20:46,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:46,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:20:46,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5120019] [2020-10-14 08:20:46,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:20:46,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:20:46,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277068652] [2020-10-14 08:20:46,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:20:46,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:20:46,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:20:46,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:20:46,403 INFO L87 Difference]: Start difference. First operand 2235 states and 3531 transitions. Second operand 4 states. [2020-10-14 08:20:47,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:20:47,192 INFO L93 Difference]: Finished difference Result 6550 states and 10383 transitions. [2020-10-14 08:20:47,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:20:47,193 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-14 08:20:47,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:20:47,216 INFO L225 Difference]: With dead ends: 6550 [2020-10-14 08:20:47,216 INFO L226 Difference]: Without dead ends: 4437 [2020-10-14 08:20:47,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:20:47,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4437 states. [2020-10-14 08:20:47,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4437 to 2241. [2020-10-14 08:20:47,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2241 states. [2020-10-14 08:20:47,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 3539 transitions. [2020-10-14 08:20:47,407 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 3539 transitions. Word has length 69 [2020-10-14 08:20:47,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:20:47,407 INFO L479 AbstractCegarLoop]: Abstraction has 2241 states and 3539 transitions. [2020-10-14 08:20:47,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:20:47,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 3539 transitions. [2020-10-14 08:20:47,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 08:20:47,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:20:47,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:20:47,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 08:20:47,410 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:20:47,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:20:47,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1224513272, now seen corresponding path program 1 times [2020-10-14 08:20:47,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:20:47,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764351439] [2020-10-14 08:20:47,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:20:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:47,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:47,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:47,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:47,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:47,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:48,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:48,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:49,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:52,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:52,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 08:20:52,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:20:52,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:20:52,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:52,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:52,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:20:52,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 08:20:52,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 08:20:52,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:20:52,625 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:20:52,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:20:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:52,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:52,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:52,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:20:52,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:20:52,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:20:52,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:52,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:52,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:20:52,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:20:52,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:20:52,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:20:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:20:52,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764351439] [2020-10-14 08:20:52,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:20:52,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:20:52,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57421223] [2020-10-14 08:20:52,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:20:52,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:20:52,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:20:52,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:20:52,662 INFO L87 Difference]: Start difference. First operand 2241 states and 3539 transitions. Second operand 4 states. [2020-10-14 08:20:53,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:20:53,911 INFO L93 Difference]: Finished difference Result 6244 states and 9969 transitions. [2020-10-14 08:20:53,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:20:53,911 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-14 08:20:53,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:20:53,933 INFO L225 Difference]: With dead ends: 6244 [2020-10-14 08:20:53,933 INFO L226 Difference]: Without dead ends: 4210 [2020-10-14 08:20:53,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:20:53,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4210 states. [2020-10-14 08:20:54,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4210 to 4208. [2020-10-14 08:20:54,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4208 states. [2020-10-14 08:20:54,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 6639 transitions. [2020-10-14 08:20:54,240 INFO L78 Accepts]: Start accepts. Automaton has 4208 states and 6639 transitions. Word has length 70 [2020-10-14 08:20:54,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:20:54,240 INFO L479 AbstractCegarLoop]: Abstraction has 4208 states and 6639 transitions. [2020-10-14 08:20:54,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:20:54,240 INFO L276 IsEmpty]: Start isEmpty. Operand 4208 states and 6639 transitions. [2020-10-14 08:20:54,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 08:20:54,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:20:54,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:20:54,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 08:20:54,244 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:20:54,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:20:54,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1285525397, now seen corresponding path program 1 times [2020-10-14 08:20:54,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:20:54,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297173627] [2020-10-14 08:20:54,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:20:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:54,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:54,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:54,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:54,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:54,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:54,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:54,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:55,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:55,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:59,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:59,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 08:20:59,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 08:20:59,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 08:20:59,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:59,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:59,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:20:59,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:20:59,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 08:20:59,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:20:59,466 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:20:59,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:20:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:20:59,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:20:59,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:20:59,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:20:59,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:20:59,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:20:59,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:20:59,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:20:59,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:20:59,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:20:59,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:20:59,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:20:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:20:59,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297173627] [2020-10-14 08:20:59,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:20:59,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:20:59,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016765726] [2020-10-14 08:20:59,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:20:59,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:20:59,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:20:59,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:20:59,499 INFO L87 Difference]: Start difference. First operand 4208 states and 6639 transitions. Second operand 5 states. [2020-10-14 08:21:00,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:00,741 INFO L93 Difference]: Finished difference Result 12025 states and 19065 transitions. [2020-10-14 08:21:00,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:21:00,742 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-14 08:21:00,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:00,801 INFO L225 Difference]: With dead ends: 12025 [2020-10-14 08:21:00,801 INFO L226 Difference]: Without dead ends: 8004 [2020-10-14 08:21:00,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:21:00,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8004 states. [2020-10-14 08:21:01,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8004 to 8002. [2020-10-14 08:21:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8002 states. [2020-10-14 08:21:01,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8002 states to 8002 states and 12568 transitions. [2020-10-14 08:21:01,525 INFO L78 Accepts]: Start accepts. Automaton has 8002 states and 12568 transitions. Word has length 70 [2020-10-14 08:21:01,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:01,526 INFO L479 AbstractCegarLoop]: Abstraction has 8002 states and 12568 transitions. [2020-10-14 08:21:01,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:21:01,526 INFO L276 IsEmpty]: Start isEmpty. Operand 8002 states and 12568 transitions. [2020-10-14 08:21:01,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 08:21:01,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:01,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:01,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 08:21:01,535 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:01,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:01,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1739945303, now seen corresponding path program 1 times [2020-10-14 08:21:01,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:01,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201108770] [2020-10-14 08:21:01,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:01,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:01,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:01,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:01,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:01,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:01,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:03,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:06,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:06,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 08:21:06,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:21:06,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:21:06,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:06,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:06,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:21:06,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-14 08:21:06,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 08:21:06,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:21:06,741 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:21:06,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:06,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:06,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:06,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:06,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:06,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:21:06,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:06,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:06,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:06,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:06,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:06,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:21:06,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:21:06,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201108770] [2020-10-14 08:21:06,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:06,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:21:06,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353037103] [2020-10-14 08:21:06,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:21:06,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:06,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:21:06,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:21:06,762 INFO L87 Difference]: Start difference. First operand 8002 states and 12568 transitions. Second operand 4 states. [2020-10-14 08:21:06,942 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:21:08,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:08,205 INFO L93 Difference]: Finished difference Result 15248 states and 24240 transitions. [2020-10-14 08:21:08,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:21:08,205 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-14 08:21:08,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:08,235 INFO L225 Difference]: With dead ends: 15248 [2020-10-14 08:21:08,235 INFO L226 Difference]: Without dead ends: 11204 [2020-10-14 08:21:08,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:21:08,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11204 states. [2020-10-14 08:21:09,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11204 to 11202. [2020-10-14 08:21:09,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11202 states. [2020-10-14 08:21:09,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11202 states to 11202 states and 17642 transitions. [2020-10-14 08:21:09,304 INFO L78 Accepts]: Start accepts. Automaton has 11202 states and 17642 transitions. Word has length 70 [2020-10-14 08:21:09,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:09,305 INFO L479 AbstractCegarLoop]: Abstraction has 11202 states and 17642 transitions. [2020-10-14 08:21:09,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:21:09,305 INFO L276 IsEmpty]: Start isEmpty. Operand 11202 states and 17642 transitions. [2020-10-14 08:21:09,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 08:21:09,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:09,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:09,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 08:21:09,317 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:09,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:09,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1315458060, now seen corresponding path program 1 times [2020-10-14 08:21:09,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:09,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111868798] [2020-10-14 08:21:09,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:09,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:09,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:09,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:09,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:09,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:09,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:10,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:14,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:14,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 08:21:14,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:21:14,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:21:14,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:14,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:14,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:21:14,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:21:14,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 08:21:14,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:14,535 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:21:14,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:14,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:14,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:14,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:14,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:14,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:21:14,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:14,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:14,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:14,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:14,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:14,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:21:14,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111868798] [2020-10-14 08:21:14,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:14,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:21:14,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589945336] [2020-10-14 08:21:14,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:21:14,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:14,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:21:14,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:21:14,566 INFO L87 Difference]: Start difference. First operand 11202 states and 17642 transitions. Second operand 5 states. [2020-10-14 08:21:16,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:16,066 INFO L93 Difference]: Finished difference Result 24120 states and 37979 transitions. [2020-10-14 08:21:16,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:21:16,067 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-14 08:21:16,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:16,101 INFO L225 Difference]: With dead ends: 24120 [2020-10-14 08:21:16,101 INFO L226 Difference]: Without dead ends: 12931 [2020-10-14 08:21:16,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:21:16,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12931 states. [2020-10-14 08:21:17,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12931 to 11527. [2020-10-14 08:21:17,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11527 states. [2020-10-14 08:21:17,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11527 states to 11527 states and 18048 transitions. [2020-10-14 08:21:17,027 INFO L78 Accepts]: Start accepts. Automaton has 11527 states and 18048 transitions. Word has length 70 [2020-10-14 08:21:17,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:17,027 INFO L479 AbstractCegarLoop]: Abstraction has 11527 states and 18048 transitions. [2020-10-14 08:21:17,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:21:17,027 INFO L276 IsEmpty]: Start isEmpty. Operand 11527 states and 18048 transitions. [2020-10-14 08:21:17,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 08:21:17,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:17,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:17,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 08:21:17,032 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:17,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:17,033 INFO L82 PathProgramCache]: Analyzing trace with hash 95044415, now seen corresponding path program 1 times [2020-10-14 08:21:17,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:17,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685729907] [2020-10-14 08:21:17,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:17,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:17,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:17,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:17,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:17,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:17,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:19,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:22,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:22,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 08:21:22,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:21:22,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:21:22,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:22,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:22,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:21:22,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 08:21:22,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 08:21:22,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:22,222 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:21:22,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:22,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:22,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:22,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:22,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:22,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:21:22,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:22,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:22,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:22,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:22,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:22,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:21:22,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685729907] [2020-10-14 08:21:22,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:22,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:21:22,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987001929] [2020-10-14 08:21:22,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:21:22,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:22,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:21:22,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:21:22,247 INFO L87 Difference]: Start difference. First operand 11527 states and 18048 transitions. Second operand 4 states. [2020-10-14 08:21:24,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:24,375 INFO L93 Difference]: Finished difference Result 34130 states and 53556 transitions. [2020-10-14 08:21:24,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:21:24,375 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-14 08:21:24,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:24,421 INFO L225 Difference]: With dead ends: 34130 [2020-10-14 08:21:24,421 INFO L226 Difference]: Without dead ends: 22998 [2020-10-14 08:21:24,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:21:24,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22998 states. [2020-10-14 08:21:25,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22998 to 11530. [2020-10-14 08:21:25,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11530 states. [2020-10-14 08:21:25,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11530 states to 11530 states and 18052 transitions. [2020-10-14 08:21:25,297 INFO L78 Accepts]: Start accepts. Automaton has 11530 states and 18052 transitions. Word has length 71 [2020-10-14 08:21:25,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:25,297 INFO L479 AbstractCegarLoop]: Abstraction has 11530 states and 18052 transitions. [2020-10-14 08:21:25,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:21:25,297 INFO L276 IsEmpty]: Start isEmpty. Operand 11530 states and 18052 transitions. [2020-10-14 08:21:25,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 08:21:25,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:25,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:25,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 08:21:25,302 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:25,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:25,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1863697099, now seen corresponding path program 1 times [2020-10-14 08:21:25,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:25,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482924532] [2020-10-14 08:21:25,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:25,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:25,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:25,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:25,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:25,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:25,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:25,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:30,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:30,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 08:21:30,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:21:30,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 08:21:30,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:30,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:30,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:21:30,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 08:21:30,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 08:21:30,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:30,546 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:21:30,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:30,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:30,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:30,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:30,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:30,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:21:30,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:30,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:30,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:30,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:30,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:30,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:21:30,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482924532] [2020-10-14 08:21:30,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:30,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:21:30,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770599476] [2020-10-14 08:21:30,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:21:30,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:30,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:21:30,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:21:30,579 INFO L87 Difference]: Start difference. First operand 11530 states and 18052 transitions. Second operand 5 states. [2020-10-14 08:21:31,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:31,930 INFO L93 Difference]: Finished difference Result 23004 states and 36024 transitions. [2020-10-14 08:21:31,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:21:31,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-14 08:21:31,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:31,955 INFO L225 Difference]: With dead ends: 23004 [2020-10-14 08:21:31,955 INFO L226 Difference]: Without dead ends: 11525 [2020-10-14 08:21:31,980 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 [2020-10-14 08:21:31,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11525 states. [2020-10-14 08:21:32,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11525 to 11525. [2020-10-14 08:21:32,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11525 states. [2020-10-14 08:21:32,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11525 states to 11525 states and 18043 transitions. [2020-10-14 08:21:32,777 INFO L78 Accepts]: Start accepts. Automaton has 11525 states and 18043 transitions. Word has length 72 [2020-10-14 08:21:32,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:32,777 INFO L479 AbstractCegarLoop]: Abstraction has 11525 states and 18043 transitions. [2020-10-14 08:21:32,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:21:32,777 INFO L276 IsEmpty]: Start isEmpty. Operand 11525 states and 18043 transitions. [2020-10-14 08:21:32,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 08:21:32,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:32,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:32,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 08:21:32,782 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:32,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:32,782 INFO L82 PathProgramCache]: Analyzing trace with hash -745851851, now seen corresponding path program 1 times [2020-10-14 08:21:32,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:32,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364298829] [2020-10-14 08:21:32,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:32,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:32,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:32,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:32,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:32,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:33,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:37,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:37,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 08:21:37,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:21:37,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:21:37,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:37,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:37,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:21:37,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-14 08:21:37,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 08:21:37,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:37,962 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:21:37,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:37,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:37,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:37,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:37,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:37,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:21:37,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:37,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:37,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:37,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:37,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:37,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:21:37,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364298829] [2020-10-14 08:21:37,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:37,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:21:37,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521592386] [2020-10-14 08:21:37,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:21:37,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:37,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:21:37,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:21:37,995 INFO L87 Difference]: Start difference. First operand 11525 states and 18043 transitions. Second operand 4 states. [2020-10-14 08:21:38,194 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:21:39,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:39,886 INFO L93 Difference]: Finished difference Result 21177 states and 34077 transitions. [2020-10-14 08:21:39,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:21:39,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-14 08:21:39,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:39,918 INFO L225 Difference]: With dead ends: 21177 [2020-10-14 08:21:39,918 INFO L226 Difference]: Without dead ends: 15311 [2020-10-14 08:21:39,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:21:39,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15311 states. [2020-10-14 08:21:41,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15311 to 15309. [2020-10-14 08:21:41,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15309 states. [2020-10-14 08:21:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15309 states to 15309 states and 24275 transitions. [2020-10-14 08:21:41,084 INFO L78 Accepts]: Start accepts. Automaton has 15309 states and 24275 transitions. Word has length 72 [2020-10-14 08:21:41,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:41,084 INFO L479 AbstractCegarLoop]: Abstraction has 15309 states and 24275 transitions. [2020-10-14 08:21:41,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:21:41,084 INFO L276 IsEmpty]: Start isEmpty. Operand 15309 states and 24275 transitions. [2020-10-14 08:21:41,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 08:21:41,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:41,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:41,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 08:21:41,088 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:41,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:41,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1405771022, now seen corresponding path program 1 times [2020-10-14 08:21:41,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:41,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205316670] [2020-10-14 08:21:41,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:41,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:41,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:41,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:41,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:41,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:41,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:41,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:41,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:46,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:46,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 08:21:46,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:21:46,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 08:21:46,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:46,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:46,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:21:46,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:21:46,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 08:21:46,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:46,365 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:21:46,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:46,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:46,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:46,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:46,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:46,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:21:46,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:46,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:46,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:46,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:46,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:46,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:21:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:21:46,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205316670] [2020-10-14 08:21:46,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:46,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:21:46,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557996236] [2020-10-14 08:21:46,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:21:46,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:46,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:21:46,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:21:46,402 INFO L87 Difference]: Start difference. First operand 15309 states and 24275 transitions. Second operand 5 states. [2020-10-14 08:21:48,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:21:48,675 INFO L93 Difference]: Finished difference Result 34259 states and 54241 transitions. [2020-10-14 08:21:48,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:21:48,676 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-14 08:21:48,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:21:48,706 INFO L225 Difference]: With dead ends: 34259 [2020-10-14 08:21:48,706 INFO L226 Difference]: Without dead ends: 19153 [2020-10-14 08:21:48,730 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 [2020-10-14 08:21:48,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19153 states. [2020-10-14 08:21:50,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19153 to 19151. [2020-10-14 08:21:50,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19151 states. [2020-10-14 08:21:50,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19151 states to 19151 states and 29959 transitions. [2020-10-14 08:21:50,193 INFO L78 Accepts]: Start accepts. Automaton has 19151 states and 29959 transitions. Word has length 72 [2020-10-14 08:21:50,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:21:50,193 INFO L479 AbstractCegarLoop]: Abstraction has 19151 states and 29959 transitions. [2020-10-14 08:21:50,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:21:50,193 INFO L276 IsEmpty]: Start isEmpty. Operand 19151 states and 29959 transitions. [2020-10-14 08:21:50,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 08:21:50,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:21:50,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:21:50,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 08:21:50,196 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:21:50,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:21:50,197 INFO L82 PathProgramCache]: Analyzing trace with hash 816773821, now seen corresponding path program 1 times [2020-10-14 08:21:50,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:21:50,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343801323] [2020-10-14 08:21:50,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:21:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:50,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:50,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:50,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:50,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:50,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:50,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:55,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:55,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 08:21:55,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:21:55,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 08:21:55,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:55,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:55,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:21:55,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:21:55,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 08:21:55,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:55,411 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:21:55,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:21:55,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:21:55,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:21:55,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:21:55,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:21:55,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:21:55,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:21:55,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:21:55,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:21:55,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:21:55,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:21:55,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:21:55,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:21:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:21:55,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343801323] [2020-10-14 08:21:55,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:21:55,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 08:21:55,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407489921] [2020-10-14 08:21:55,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:21:55,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:21:55,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:21:55,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:21:55,436 INFO L87 Difference]: Start difference. First operand 19151 states and 29959 transitions. Second operand 6 states. [2020-10-14 08:21:55,634 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-14 08:22:02,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:22:02,143 INFO L93 Difference]: Finished difference Result 94661 states and 151491 transitions. [2020-10-14 08:22:02,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 08:22:02,144 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-14 08:22:02,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:22:02,253 INFO L225 Difference]: With dead ends: 94661 [2020-10-14 08:22:02,253 INFO L226 Difference]: Without dead ends: 76545 [2020-10-14 08:22:02,298 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 [2020-10-14 08:22:02,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76545 states. [2020-10-14 08:22:05,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76545 to 35925. [2020-10-14 08:22:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35925 states. [2020-10-14 08:22:05,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35925 states to 35925 states and 56245 transitions. [2020-10-14 08:22:05,720 INFO L78 Accepts]: Start accepts. Automaton has 35925 states and 56245 transitions. Word has length 75 [2020-10-14 08:22:05,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:22:05,721 INFO L479 AbstractCegarLoop]: Abstraction has 35925 states and 56245 transitions. [2020-10-14 08:22:05,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:22:05,721 INFO L276 IsEmpty]: Start isEmpty. Operand 35925 states and 56245 transitions. [2020-10-14 08:22:05,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 08:22:05,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:22:05,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:22:05,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 08:22:05,725 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:22:05,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:22:05,725 INFO L82 PathProgramCache]: Analyzing trace with hash -511425777, now seen corresponding path program 1 times [2020-10-14 08:22:05,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:22:05,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240934180] [2020-10-14 08:22:05,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:22:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:05,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:05,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:05,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:05,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:05,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:05,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:10,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:10,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 08:22:10,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:22:10,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:22:10,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:10,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:10,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:22:10,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:22:10,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 08:22:10,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:10,934 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:22:10,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:22:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:10,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:10,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:10,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:22:10,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:22:10,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:22:10,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:10,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:10,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:22:10,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:22:10,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:22:10,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:22:10,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240934180] [2020-10-14 08:22:10,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:22:10,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:22:10,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407325622] [2020-10-14 08:22:10,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:22:10,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:22:10,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:22:10,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:22:10,957 INFO L87 Difference]: Start difference. First operand 35925 states and 56245 transitions. Second operand 5 states. [2020-10-14 08:22:11,145 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:22:18,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:22:18,150 INFO L93 Difference]: Finished difference Result 115471 states and 183396 transitions. [2020-10-14 08:22:18,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:22:18,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-10-14 08:22:18,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:22:18,272 INFO L225 Difference]: With dead ends: 115471 [2020-10-14 08:22:18,273 INFO L226 Difference]: Without dead ends: 80581 [2020-10-14 08:22:18,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:22:18,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80581 states. [2020-10-14 08:22:24,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80581 to 58031. [2020-10-14 08:22:24,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58031 states. [2020-10-14 08:22:24,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58031 states to 58031 states and 91203 transitions. [2020-10-14 08:22:24,848 INFO L78 Accepts]: Start accepts. Automaton has 58031 states and 91203 transitions. Word has length 76 [2020-10-14 08:22:24,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:22:24,849 INFO L479 AbstractCegarLoop]: Abstraction has 58031 states and 91203 transitions. [2020-10-14 08:22:24,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:22:24,849 INFO L276 IsEmpty]: Start isEmpty. Operand 58031 states and 91203 transitions. [2020-10-14 08:22:24,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 08:22:24,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:22:24,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:22:24,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 08:22:24,852 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:22:24,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:22:24,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1760154472, now seen corresponding path program 1 times [2020-10-14 08:22:24,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:22:24,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842299479] [2020-10-14 08:22:24,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:22:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:24,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:24,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:24,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:24,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:26,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:26,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:29,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:29,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 08:22:29,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:22:29,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 08:22:29,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:29,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:29,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:22:29,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-14 08:22:29,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 08:22:29,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:30,048 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:22:30,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:22:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:30,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:30,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:30,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:22:30,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:22:30,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:22:30,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:30,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:30,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:22:30,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:22:30,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:22:30,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:30,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:22:30,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842299479] [2020-10-14 08:22:30,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:22:30,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:22:30,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413238517] [2020-10-14 08:22:30,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:22:30,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:22:30,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:22:30,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:22:30,078 INFO L87 Difference]: Start difference. First operand 58031 states and 91203 transitions. Second operand 4 states. [2020-10-14 08:22:30,273 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:22:37,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:22:37,630 INFO L93 Difference]: Finished difference Result 111127 states and 176065 transitions. [2020-10-14 08:22:37,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:22:37,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-10-14 08:22:37,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:22:37,745 INFO L225 Difference]: With dead ends: 111127 [2020-10-14 08:22:37,745 INFO L226 Difference]: Without dead ends: 79109 [2020-10-14 08:22:37,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:22:37,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79109 states. [2020-10-14 08:22:46,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79109 to 79107. [2020-10-14 08:22:46,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79107 states. [2020-10-14 08:22:46,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79107 states to 79107 states and 124403 transitions. [2020-10-14 08:22:46,262 INFO L78 Accepts]: Start accepts. Automaton has 79107 states and 124403 transitions. Word has length 76 [2020-10-14 08:22:46,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:22:46,262 INFO L479 AbstractCegarLoop]: Abstraction has 79107 states and 124403 transitions. [2020-10-14 08:22:46,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:22:46,263 INFO L276 IsEmpty]: Start isEmpty. Operand 79107 states and 124403 transitions. [2020-10-14 08:22:46,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 08:22:46,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:22:46,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:22:46,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 08:22:46,265 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:22:46,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:22:46,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1268617668, now seen corresponding path program 1 times [2020-10-14 08:22:46,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:22:46,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649160871] [2020-10-14 08:22:46,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:22:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:46,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:46,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:46,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:46,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:46,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:46,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:51,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:51,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 08:22:51,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:22:51,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 08:22:51,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:51,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:51,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:22:51,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 08:22:51,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 08:22:51,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:51,478 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:22:51,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:22:51,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:22:51,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:22:51,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:22:51,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:22:51,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:22:51,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:22:51,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:22:51,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:22:51,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:22:51,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:22:51,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:22:51,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:22:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:22:51,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649160871] [2020-10-14 08:22:51,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:22:51,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:22:51,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993831480] [2020-10-14 08:22:51,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:22:51,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:22:51,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:22:51,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:22:51,502 INFO L87 Difference]: Start difference. First operand 79107 states and 124403 transitions. Second operand 5 states. [2020-10-14 08:22:51,698 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:23:09,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:23:09,735 INFO L93 Difference]: Finished difference Result 253107 states and 400228 transitions. [2020-10-14 08:23:09,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:23:09,736 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-10-14 08:23:09,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:23:09,993 INFO L225 Difference]: With dead ends: 253107 [2020-10-14 08:23:09,994 INFO L226 Difference]: Without dead ends: 175215 [2020-10-14 08:23:10,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:23:10,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175215 states. [2020-10-14 08:23:24,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175215 to 126619. [2020-10-14 08:23:24,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126619 states. [2020-10-14 08:23:24,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126619 states to 126619 states and 198139 transitions. [2020-10-14 08:23:24,809 INFO L78 Accepts]: Start accepts. Automaton has 126619 states and 198139 transitions. Word has length 77 [2020-10-14 08:23:24,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:23:24,809 INFO L479 AbstractCegarLoop]: Abstraction has 126619 states and 198139 transitions. [2020-10-14 08:23:24,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:23:24,809 INFO L276 IsEmpty]: Start isEmpty. Operand 126619 states and 198139 transitions. [2020-10-14 08:23:24,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 08:23:24,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:23:24,812 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:23:24,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 08:23:24,812 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:23:24,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:23:24,812 INFO L82 PathProgramCache]: Analyzing trace with hash 619947638, now seen corresponding path program 1 times [2020-10-14 08:23:24,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:23:24,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057681484] [2020-10-14 08:23:24,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:23:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:24,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:24,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:24,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:24,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:24,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:24,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:29,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:29,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 08:23:29,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:23:29,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 08:23:29,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:29,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:29,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:23:29,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-14 08:23:29,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 08:23:29,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:30,022 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:23:30,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:23:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:23:30,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:23:30,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:23:30,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:23:30,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:23:30,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:23:30,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:23:30,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:23:30,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:23:30,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:23:30,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:23:30,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:23:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:23:30,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057681484] [2020-10-14 08:23:30,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:23:30,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:23:30,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324773977] [2020-10-14 08:23:30,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:23:30,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:23:30,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:23:30,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:23:30,052 INFO L87 Difference]: Start difference. First operand 126619 states and 198139 transitions. Second operand 5 states. [2020-10-14 08:23:30,253 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 158