/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_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:23:04,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:23:04,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:23:04,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:23:04,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:23:04,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:23:04,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:23:04,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:23:04,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:23:04,277 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:23:04,278 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:23:04,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:23:04,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:23:04,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:23:04,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:23:04,282 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:23:04,283 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:23:04,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:23:04,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:23:04,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:23:04,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:23:04,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:23:04,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:23:04,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:23:04,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:23:04,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:23:04,295 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:23:04,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:23:04,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:23:04,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:23:04,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:23:04,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:23:04,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:23:04,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:23:04,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:23:04,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:23:04,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:23:04,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:23:04,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:23:04,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:23:04,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:23:04,305 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 09:23:04,327 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:23:04,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:23:04,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:23:04,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:23:04,329 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:23:04,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:23:04,330 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:23:04,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:23:04,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:23:04,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:23:04,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:23:04,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:23:04,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:23:04,331 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:23:04,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:23:04,331 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:23:04,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:23:04,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:23:04,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:23:04,332 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:23:04,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:23:04,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:23:04,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:23:04,333 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:23:04,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:23:04,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:23:04,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:23:04,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:23:04,334 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:23:04,334 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 09:23:04,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:23:04,626 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:23:04,630 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:23:04,631 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:23:04,632 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:23:04,632 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 09:23:04,692 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f386a85b6/540b05f5feb84323b2e92cce60a7fac3/FLAG620357149 [2020-10-14 09:23:05,206 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:23:05,207 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 09:23:05,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f386a85b6/540b05f5feb84323b2e92cce60a7fac3/FLAG620357149 [2020-10-14 09:23:05,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f386a85b6/540b05f5feb84323b2e92cce60a7fac3 [2020-10-14 09:23:05,487 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:23:05,489 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:23:05,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:23:05,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:23:05,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:23:05,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:23:05" (1/1) ... [2020-10-14 09:23:05,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@322abbc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:05, skipping insertion in model container [2020-10-14 09:23:05,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:23:05" (1/1) ... [2020-10-14 09:23:05,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:23:05,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:23:05,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:23:05,881 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:23:06,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:23:06,101 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:23:06,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:06 WrapperNode [2020-10-14 09:23:06,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:23:06,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:23:06,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:23:06,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:23:06,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:06" (1/1) ... [2020-10-14 09:23:06,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:06" (1/1) ... [2020-10-14 09:23:06,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:06" (1/1) ... [2020-10-14 09:23:06,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:06" (1/1) ... [2020-10-14 09:23:06,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:06" (1/1) ... [2020-10-14 09:23:06,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:06" (1/1) ... [2020-10-14 09:23:06,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:06" (1/1) ... [2020-10-14 09:23:06,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:23:06,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:23:06,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:23:06,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:23:06,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:06" (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 09:23:06,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:23:06,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:23:06,251 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:23:06,251 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:23:06,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:23:06,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:23:06,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:23:06,252 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:23:06,252 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:23:06,252 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:23:06,252 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:23:06,252 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:23:06,253 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:23:06,253 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:23:06,253 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:23:06,255 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:23:06,255 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:23:06,255 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:23:06,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:23:06,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:23:07,035 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:23:07,036 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:23:07,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:23:07 BoogieIcfgContainer [2020-10-14 09:23:07,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:23:07,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:23:07,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:23:07,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:23:07,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:23:05" (1/3) ... [2020-10-14 09:23:07,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435f0e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:23:07, skipping insertion in model container [2020-10-14 09:23:07,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:23:06" (2/3) ... [2020-10-14 09:23:07,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435f0e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:23:07, skipping insertion in model container [2020-10-14 09:23:07,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:23:07" (3/3) ... [2020-10-14 09:23:07,049 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 09:23:07,060 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:23:07,068 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:23:07,082 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:23:07,106 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:23:07,107 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:23:07,107 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:23:07,107 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:23:07,107 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:23:07,107 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:23:07,108 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:23:07,108 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:23:07,130 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states. [2020-10-14 09:23:07,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 09:23:07,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:23:07,141 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 09:23:07,142 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:23:07,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:23:07,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1156285635, now seen corresponding path program 1 times [2020-10-14 09:23:07,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:23:07,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859682246] [2020-10-14 09:23:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:23:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:07,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:07,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:07,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:08,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:09,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:09,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 09:23:09,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:23:09,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2097 [2020-10-14 09:23:09,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:09,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:09,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:23:09,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 09:23:09,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 09:23:09,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 09:23:09,959 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:23:09,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:23:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:09,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:09,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:09,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:23:09,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:23:09,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 09:23:09,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:09,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:09,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:23:09,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:23:09,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:23:09,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:23:10,004 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 09:23:10,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859682246] [2020-10-14 09:23:10,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:23:10,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:23:10,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711711142] [2020-10-14 09:23:10,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:23:10,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:23:10,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:23:10,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:23:10,032 INFO L87 Difference]: Start difference. First operand 148 states. Second operand 4 states. [2020-10-14 09:23:10,274 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-14 09:23:10,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:23:10,995 INFO L93 Difference]: Finished difference Result 326 states and 546 transitions. [2020-10-14 09:23:10,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:23:10,997 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-14 09:23:10,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:23:11,011 INFO L225 Difference]: With dead ends: 326 [2020-10-14 09:23:11,012 INFO L226 Difference]: Without dead ends: 225 [2020-10-14 09:23:11,016 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 09:23:11,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-14 09:23:11,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2020-10-14 09:23:11,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-14 09:23:11,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 355 transitions. [2020-10-14 09:23:11,092 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 355 transitions. Word has length 60 [2020-10-14 09:23:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:23:11,093 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 355 transitions. [2020-10-14 09:23:11,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:23:11,093 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 355 transitions. [2020-10-14 09:23:11,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 09:23:11,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:23:11,099 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 09:23:11,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:23:11,100 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:23:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:23:11,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1414218050, now seen corresponding path program 1 times [2020-10-14 09:23:11,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:23:11,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639075129] [2020-10-14 09:23:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:23:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:11,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:11,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:11,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:11,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:12,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:14,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:14,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 09:23:14,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:23:14,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3803 [2020-10-14 09:23:14,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:14,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:14,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:23:14,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 09:23:14,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 09:23:14,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 09:23:15,317 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:23:15,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:23:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:15,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:15,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:15,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:23:15,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:23:15,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 09:23:15,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:15,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:15,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:23:15,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:23:15,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:23:15,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 09:23:15,388 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 09:23:15,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639075129] [2020-10-14 09:23:15,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:23:15,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:23:15,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586617710] [2020-10-14 09:23:15,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:23:15,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:23:15,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:23:15,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:23:15,394 INFO L87 Difference]: Start difference. First operand 223 states and 355 transitions. Second operand 4 states. [2020-10-14 09:23:15,677 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-14 09:23:16,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:23:16,460 INFO L93 Difference]: Finished difference Result 543 states and 891 transitions. [2020-10-14 09:23:16,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:23:16,460 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-14 09:23:16,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:23:16,469 INFO L225 Difference]: With dead ends: 543 [2020-10-14 09:23:16,469 INFO L226 Difference]: Without dead ends: 375 [2020-10-14 09:23:16,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:23:16,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-14 09:23:16,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 373. [2020-10-14 09:23:16,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2020-10-14 09:23:16,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 606 transitions. [2020-10-14 09:23:16,537 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 606 transitions. Word has length 62 [2020-10-14 09:23:16,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:23:16,538 INFO L479 AbstractCegarLoop]: Abstraction has 373 states and 606 transitions. [2020-10-14 09:23:16,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:23:16,538 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 606 transitions. [2020-10-14 09:23:16,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 09:23:16,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:23:16,548 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 09:23:16,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:23:16,548 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:23:16,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:23:16,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1834405377, now seen corresponding path program 1 times [2020-10-14 09:23:16,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:23:16,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383879264] [2020-10-14 09:23:16,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:23:16,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:16,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:16,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:16,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:16,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:17,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:17,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:21,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:21,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 09:23:21,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:23:21,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 09:23:21,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:21,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:21,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:23:21,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 09:23:21,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 09:23:21,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:23:21,802 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:23:21,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:23:21,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:21,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:21,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:21,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:23:21,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:23:21,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:23:21,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:21,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:21,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:23:21,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:23:21,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:23:21,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:23:21,831 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 09:23:21,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383879264] [2020-10-14 09:23:21,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:23:21,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:23:21,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906425234] [2020-10-14 09:23:21,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:23:21,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:23:21,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:23:21,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:23:21,834 INFO L87 Difference]: Start difference. First operand 373 states and 606 transitions. Second operand 4 states. [2020-10-14 09:23:22,019 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-14 09:23:22,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:23:22,651 INFO L93 Difference]: Finished difference Result 969 states and 1600 transitions. [2020-10-14 09:23:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:23:22,653 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-14 09:23:22,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:23:22,658 INFO L225 Difference]: With dead ends: 969 [2020-10-14 09:23:22,658 INFO L226 Difference]: Without dead ends: 651 [2020-10-14 09:23:22,661 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 09:23:22,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2020-10-14 09:23:22,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 649. [2020-10-14 09:23:22,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-10-14 09:23:22,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1046 transitions. [2020-10-14 09:23:22,696 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1046 transitions. Word has length 64 [2020-10-14 09:23:22,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:23:22,697 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 1046 transitions. [2020-10-14 09:23:22,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:23:22,697 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1046 transitions. [2020-10-14 09:23:22,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 09:23:22,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:23:22,699 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 09:23:22,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:23:22,700 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:23:22,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:23:22,700 INFO L82 PathProgramCache]: Analyzing trace with hash 861820032, now seen corresponding path program 1 times [2020-10-14 09:23:22,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:23:22,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385563840] [2020-10-14 09:23:22,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:23:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:22,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:22,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:22,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:23,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:23,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:25,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:25,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:27,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:27,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 09:23:27,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:23:27,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 09:23:27,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:27,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:27,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:23:27,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:23:27,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 09:23:27,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:23:27,967 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:23:27,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:23:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:27,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:27,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:27,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:23:27,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:23:27,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:23:27,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:27,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:27,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:23:27,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:23:27,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:23:27,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:23:28,004 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 09:23:28,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385563840] [2020-10-14 09:23:28,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:23:28,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:23:28,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137679808] [2020-10-14 09:23:28,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:23:28,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:23:28,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:23:28,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:23:28,007 INFO L87 Difference]: Start difference. First operand 649 states and 1046 transitions. Second operand 5 states. [2020-10-14 09:23:28,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:23:28,801 INFO L93 Difference]: Finished difference Result 1866 states and 3008 transitions. [2020-10-14 09:23:28,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:23:28,802 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-14 09:23:28,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:23:28,809 INFO L225 Difference]: With dead ends: 1866 [2020-10-14 09:23:28,810 INFO L226 Difference]: Without dead ends: 1242 [2020-10-14 09:23:28,812 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 09:23:28,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2020-10-14 09:23:28,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1240. [2020-10-14 09:23:28,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1240 states. [2020-10-14 09:23:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1987 transitions. [2020-10-14 09:23:28,879 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1987 transitions. Word has length 66 [2020-10-14 09:23:28,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:23:28,879 INFO L479 AbstractCegarLoop]: Abstraction has 1240 states and 1987 transitions. [2020-10-14 09:23:28,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:23:28,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1987 transitions. [2020-10-14 09:23:28,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 09:23:28,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:23:28,882 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 09:23:28,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:23:28,882 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:23:28,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:23:28,883 INFO L82 PathProgramCache]: Analyzing trace with hash 848919955, now seen corresponding path program 1 times [2020-10-14 09:23:28,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:23:28,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449059497] [2020-10-14 09:23:28,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:23:28,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:28,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:28,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:28,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:29,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:29,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:29,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:29,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:30,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:33,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:33,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 09:23:33,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:23:33,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 09:23:33,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:33,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:33,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:23:33,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-14 09:23:33,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 09:23:33,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:23:34,139 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:23:34,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:23:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:34,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:34,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:34,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:23:34,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:23:34,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:23:34,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:34,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:34,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:23:34,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:23:34,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:23:34,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:23:34,166 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 09:23:34,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449059497] [2020-10-14 09:23:34,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:23:34,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:23:34,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676283445] [2020-10-14 09:23:34,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:23:34,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:23:34,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:23:34,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:23:34,168 INFO L87 Difference]: Start difference. First operand 1240 states and 1987 transitions. Second operand 4 states. [2020-10-14 09:23:34,389 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:23:35,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:23:35,143 INFO L93 Difference]: Finished difference Result 2450 states and 3961 transitions. [2020-10-14 09:23:35,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:23:35,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 09:23:35,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:23:35,162 INFO L225 Difference]: With dead ends: 2450 [2020-10-14 09:23:35,162 INFO L226 Difference]: Without dead ends: 1846 [2020-10-14 09:23:35,165 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 09:23:35,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2020-10-14 09:23:35,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1844. [2020-10-14 09:23:35,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1844 states. [2020-10-14 09:23:35,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 2953 transitions. [2020-10-14 09:23:35,319 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 2953 transitions. Word has length 67 [2020-10-14 09:23:35,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:23:35,320 INFO L479 AbstractCegarLoop]: Abstraction has 1844 states and 2953 transitions. [2020-10-14 09:23:35,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:23:35,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 2953 transitions. [2020-10-14 09:23:35,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 09:23:35,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:23:35,322 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 09:23:35,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:23:35,323 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:23:35,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:23:35,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1369327551, now seen corresponding path program 1 times [2020-10-14 09:23:35,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:23:35,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595791489] [2020-10-14 09:23:35,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:23:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:35,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:35,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:35,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:35,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:35,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:35,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:37,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:40,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:40,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 09:23:40,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:23:40,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 09:23:40,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:40,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:40,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:23:40,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-14 09:23:40,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 09:23:40,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:23:40,621 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:23:40,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:23:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:40,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:40,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:40,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:23:40,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:23:40,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:23:40,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:40,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:40,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:23:40,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:23:40,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:23:40,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:23:40,665 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 09:23:40,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595791489] [2020-10-14 09:23:40,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:23:40,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:23:40,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170790070] [2020-10-14 09:23:40,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:23:40,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:23:40,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:23:40,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:23:40,670 INFO L87 Difference]: Start difference. First operand 1844 states and 2953 transitions. Second operand 4 states. [2020-10-14 09:23:41,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:23:41,661 INFO L93 Difference]: Finished difference Result 3964 states and 6415 transitions. [2020-10-14 09:23:41,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:23:41,662 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 09:23:41,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:23:41,681 INFO L225 Difference]: With dead ends: 3964 [2020-10-14 09:23:41,681 INFO L226 Difference]: Without dead ends: 2376 [2020-10-14 09:23:41,688 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 09:23:41,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2020-10-14 09:23:41,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2334. [2020-10-14 09:23:41,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2334 states. [2020-10-14 09:23:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 3735 transitions. [2020-10-14 09:23:41,887 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 3735 transitions. Word has length 67 [2020-10-14 09:23:41,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:23:41,889 INFO L479 AbstractCegarLoop]: Abstraction has 2334 states and 3735 transitions. [2020-10-14 09:23:41,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:23:41,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 3735 transitions. [2020-10-14 09:23:41,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 09:23:41,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:23:41,891 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 09:23:41,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:23:41,892 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:23:41,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:23:41,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1620721115, now seen corresponding path program 1 times [2020-10-14 09:23:41,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:23:41,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446754260] [2020-10-14 09:23:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:23:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:41,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:41,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:42,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:42,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:42,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:42,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:44,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:46,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:46,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 09:23:46,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:23:46,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 09:23:46,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:46,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:46,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:23:46,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:23:46,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:23:46,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:23:47,157 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:23:47,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:23:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:47,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:47,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:47,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:23:47,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:23:47,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 09:23:47,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:47,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:47,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:23:47,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:23:47,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:23:47,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:23:47,199 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 09:23:47,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446754260] [2020-10-14 09:23:47,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:23:47,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:23:47,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571983589] [2020-10-14 09:23:47,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:23:47,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:23:47,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:23:47,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:23:47,203 INFO L87 Difference]: Start difference. First operand 2334 states and 3735 transitions. Second operand 4 states. [2020-10-14 09:23:48,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:23:48,182 INFO L93 Difference]: Finished difference Result 6823 states and 10935 transitions. [2020-10-14 09:23:48,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:23:48,183 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 09:23:48,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:23:48,209 INFO L225 Difference]: With dead ends: 6823 [2020-10-14 09:23:48,209 INFO L226 Difference]: Without dead ends: 4627 [2020-10-14 09:23:48,217 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 09:23:48,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2020-10-14 09:23:48,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 2337. [2020-10-14 09:23:48,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2337 states. [2020-10-14 09:23:48,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 3739 transitions. [2020-10-14 09:23:48,408 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 3739 transitions. Word has length 67 [2020-10-14 09:23:48,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:23:48,409 INFO L479 AbstractCegarLoop]: Abstraction has 2337 states and 3739 transitions. [2020-10-14 09:23:48,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:23:48,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 3739 transitions. [2020-10-14 09:23:48,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 09:23:48,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:23:48,415 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 09:23:48,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:23:48,416 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:23:48,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:23:48,416 INFO L82 PathProgramCache]: Analyzing trace with hash 141113665, now seen corresponding path program 1 times [2020-10-14 09:23:48,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:23:48,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49538363] [2020-10-14 09:23:48,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:23:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:48,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:48,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:48,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:48,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:48,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:50,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:50,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 09:23:50,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:23:50,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2407 [2020-10-14 09:23:50,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:50,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:50,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:23:50,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:23:50,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 09:23:50,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:23:51,123 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:23:51,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:23:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:51,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:51,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:51,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:23:51,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:23:51,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:23:51,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:51,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:51,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:23:51,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:23:51,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:23:51,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:23:51,164 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 09:23:51,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49538363] [2020-10-14 09:23:51,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:23:51,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:23:51,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272106018] [2020-10-14 09:23:51,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:23:51,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:23:51,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:23:51,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:23:51,167 INFO L87 Difference]: Start difference. First operand 2337 states and 3739 transitions. Second operand 5 states. [2020-10-14 09:23:52,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:23:52,349 INFO L93 Difference]: Finished difference Result 6557 states and 10521 transitions. [2020-10-14 09:23:52,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:23:52,350 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-14 09:23:52,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:23:52,372 INFO L225 Difference]: With dead ends: 6557 [2020-10-14 09:23:52,372 INFO L226 Difference]: Without dead ends: 4467 [2020-10-14 09:23:52,381 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 09:23:52,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4467 states. [2020-10-14 09:23:52,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4467 to 4465. [2020-10-14 09:23:52,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4465 states. [2020-10-14 09:23:52,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4465 states to 4465 states and 7099 transitions. [2020-10-14 09:23:52,753 INFO L78 Accepts]: Start accepts. Automaton has 4465 states and 7099 transitions. Word has length 68 [2020-10-14 09:23:52,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:23:52,753 INFO L479 AbstractCegarLoop]: Abstraction has 4465 states and 7099 transitions. [2020-10-14 09:23:52,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:23:52,753 INFO L276 IsEmpty]: Start isEmpty. Operand 4465 states and 7099 transitions. [2020-10-14 09:23:52,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 09:23:52,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:23:52,756 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 09:23:52,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:23:52,757 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:23:52,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:23:52,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1986984346, now seen corresponding path program 1 times [2020-10-14 09:23:52,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:23:52,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053135218] [2020-10-14 09:23:52,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:23:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:52,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:52,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:52,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:52,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:53,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:54,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:54,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 09:23:54,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:23:54,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1376 [2020-10-14 09:23:54,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:54,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:54,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:23:54,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 09:23:54,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:23:54,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:23:54,359 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:23:54,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:23:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:54,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:54,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:54,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:23:54,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:23:54,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:23:54,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:54,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:54,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:23:54,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:23:54,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:23:54,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:23:54,388 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 09:23:54,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053135218] [2020-10-14 09:23:54,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:23:54,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:23:54,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113120059] [2020-10-14 09:23:54,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:23:54,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:23:54,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:23:54,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:23:54,391 INFO L87 Difference]: Start difference. First operand 4465 states and 7099 transitions. Second operand 4 states. [2020-10-14 09:23:55,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:23:55,439 INFO L93 Difference]: Finished difference Result 13313 states and 21161 transitions. [2020-10-14 09:23:55,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:23:55,440 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-14 09:23:55,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:23:55,484 INFO L225 Difference]: With dead ends: 13313 [2020-10-14 09:23:55,484 INFO L226 Difference]: Without dead ends: 8895 [2020-10-14 09:23:55,496 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 09:23:55,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8895 states. [2020-10-14 09:23:55,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8895 to 4477. [2020-10-14 09:23:55,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4477 states. [2020-10-14 09:23:55,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 7115 transitions. [2020-10-14 09:23:55,835 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 7115 transitions. Word has length 69 [2020-10-14 09:23:55,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:23:55,835 INFO L479 AbstractCegarLoop]: Abstraction has 4477 states and 7115 transitions. [2020-10-14 09:23:55,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:23:55,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 7115 transitions. [2020-10-14 09:23:55,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 09:23:55,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:23:55,839 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 09:23:55,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:23:55,839 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:23:55,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:23:55,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1563741158, now seen corresponding path program 1 times [2020-10-14 09:23:55,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:23:55,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871902972] [2020-10-14 09:23:55,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:23:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:55,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:55,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:55,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:55,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:56,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:57,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:57,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 09:23:57,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:23:57,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1157 [2020-10-14 09:23:57,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:57,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:57,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:23:57,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-14 09:23:57,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 09:23:57,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 09:23:57,374 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:23:57,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:23:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:57,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:57,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:23:57,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:23:57,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:23:57,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:23:57,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:23:57,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:23:57,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:23:57,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:23:57,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:23:57,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:23:57,396 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 09:23:57,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871902972] [2020-10-14 09:23:57,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:23:57,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:23:57,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342460005] [2020-10-14 09:23:57,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:23:57,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:23:57,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:23:57,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:23:57,399 INFO L87 Difference]: Start difference. First operand 4477 states and 7115 transitions. Second operand 4 states. [2020-10-14 09:23:57,607 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:23:58,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:23:58,566 INFO L93 Difference]: Finished difference Result 8097 states and 12973 transitions. [2020-10-14 09:23:58,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:23:58,567 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-14 09:23:58,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:23:58,582 INFO L225 Difference]: With dead ends: 8097 [2020-10-14 09:23:58,583 INFO L226 Difference]: Without dead ends: 5907 [2020-10-14 09:23:58,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:23:58,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5907 states. [2020-10-14 09:23:58,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5907 to 5905. [2020-10-14 09:23:58,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5905 states. [2020-10-14 09:23:58,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5905 states to 5905 states and 9391 transitions. [2020-10-14 09:23:58,899 INFO L78 Accepts]: Start accepts. Automaton has 5905 states and 9391 transitions. Word has length 69 [2020-10-14 09:23:58,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:23:58,900 INFO L479 AbstractCegarLoop]: Abstraction has 5905 states and 9391 transitions. [2020-10-14 09:23:58,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:23:58,900 INFO L276 IsEmpty]: Start isEmpty. Operand 5905 states and 9391 transitions. [2020-10-14 09:23:58,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 09:23:58,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:23:58,902 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 09:23:58,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:23:58,902 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:23:58,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:23:58,903 INFO L82 PathProgramCache]: Analyzing trace with hash 2064787172, now seen corresponding path program 1 times [2020-10-14 09:23:58,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:23:58,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942052742] [2020-10-14 09:23:58,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:23:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:23:58,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:58,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:58,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:59,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:23:59,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:00,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:00,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 09:24:00,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:24:00,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1874 [2020-10-14 09:24:00,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:00,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:00,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:24:00,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 09:24:00,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 09:24:00,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:00,998 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:24:00,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:01,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:01,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:01,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:01,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:01,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:24:01,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:01,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:01,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:01,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:01,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:01,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:01,027 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 09:24:01,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942052742] [2020-10-14 09:24:01,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:01,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:24:01,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699496331] [2020-10-14 09:24:01,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:24:01,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:01,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:24:01,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:01,030 INFO L87 Difference]: Start difference. First operand 5905 states and 9391 transitions. Second operand 4 states. [2020-10-14 09:24:01,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:01,951 INFO L93 Difference]: Finished difference Result 13273 states and 21253 transitions. [2020-10-14 09:24:01,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:24:01,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-14 09:24:01,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:01,971 INFO L225 Difference]: With dead ends: 13273 [2020-10-14 09:24:01,971 INFO L226 Difference]: Without dead ends: 7731 [2020-10-14 09:24:01,983 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 09:24:01,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7731 states. [2020-10-14 09:24:02,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7731 to 7585. [2020-10-14 09:24:02,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7585 states. [2020-10-14 09:24:02,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7585 states to 7585 states and 12019 transitions. [2020-10-14 09:24:02,496 INFO L78 Accepts]: Start accepts. Automaton has 7585 states and 12019 transitions. Word has length 69 [2020-10-14 09:24:02,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:02,496 INFO L479 AbstractCegarLoop]: Abstraction has 7585 states and 12019 transitions. [2020-10-14 09:24:02,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:24:02,496 INFO L276 IsEmpty]: Start isEmpty. Operand 7585 states and 12019 transitions. [2020-10-14 09:24:02,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 09:24:02,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:02,499 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 09:24:02,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:24:02,499 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:02,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:02,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1121294691, now seen corresponding path program 1 times [2020-10-14 09:24:02,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:02,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952883154] [2020-10-14 09:24:02,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:02,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:02,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:02,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:02,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:02,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:02,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:05,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:05,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 09:24:05,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:24:05,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2504 [2020-10-14 09:24:05,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:05,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:05,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:24:05,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:24:05,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 09:24:05,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:05,240 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:24:05,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:05,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:05,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:05,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:05,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:05,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:24:05,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:05,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:05,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:05,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:05,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:05,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:05,263 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 09:24:05,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952883154] [2020-10-14 09:24:05,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:05,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:24:05,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847915360] [2020-10-14 09:24:05,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:24:05,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:05,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:24:05,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:24:05,265 INFO L87 Difference]: Start difference. First operand 7585 states and 12019 transitions. Second operand 5 states. [2020-10-14 09:24:06,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:06,686 INFO L93 Difference]: Finished difference Result 21237 states and 33677 transitions. [2020-10-14 09:24:06,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:24:06,687 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-14 09:24:06,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:06,725 INFO L225 Difference]: With dead ends: 21237 [2020-10-14 09:24:06,725 INFO L226 Difference]: Without dead ends: 13845 [2020-10-14 09:24:06,745 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 09:24:06,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13845 states. [2020-10-14 09:24:07,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13845 to 13843. [2020-10-14 09:24:07,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13843 states. [2020-10-14 09:24:07,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13843 states to 13843 states and 21755 transitions. [2020-10-14 09:24:07,570 INFO L78 Accepts]: Start accepts. Automaton has 13843 states and 21755 transitions. Word has length 70 [2020-10-14 09:24:07,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:07,570 INFO L479 AbstractCegarLoop]: Abstraction has 13843 states and 21755 transitions. [2020-10-14 09:24:07,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:24:07,571 INFO L276 IsEmpty]: Start isEmpty. Operand 13843 states and 21755 transitions. [2020-10-14 09:24:07,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 09:24:07,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:07,573 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 09:24:07,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:24:07,574 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:07,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:07,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1559073026, now seen corresponding path program 1 times [2020-10-14 09:24:07,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:07,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886653562] [2020-10-14 09:24:07,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:07,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:07,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:07,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:08,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:08,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 09:24:08,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:24:08,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 544 [2020-10-14 09:24:08,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:08,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:08,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:24:08,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:24:08,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 09:24:08,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:08,352 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:24:08,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:08,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:08,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:08,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:08,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:08,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:24:08,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:08,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:08,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:08,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:08,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:08,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:08,374 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 09:24:08,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886653562] [2020-10-14 09:24:08,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:08,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:24:08,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087853328] [2020-10-14 09:24:08,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:24:08,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:08,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:24:08,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:24:08,376 INFO L87 Difference]: Start difference. First operand 13843 states and 21755 transitions. Second operand 5 states. [2020-10-14 09:24:10,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:10,266 INFO L93 Difference]: Finished difference Result 40154 states and 63048 transitions. [2020-10-14 09:24:10,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:24:10,267 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-14 09:24:10,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:10,324 INFO L225 Difference]: With dead ends: 40154 [2020-10-14 09:24:10,325 INFO L226 Difference]: Without dead ends: 26324 [2020-10-14 09:24:10,360 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 09:24:10,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26324 states. [2020-10-14 09:24:12,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26324 to 26322. [2020-10-14 09:24:12,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26322 states. [2020-10-14 09:24:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26322 states to 26322 states and 40996 transitions. [2020-10-14 09:24:12,490 INFO L78 Accepts]: Start accepts. Automaton has 26322 states and 40996 transitions. Word has length 70 [2020-10-14 09:24:12,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:12,490 INFO L479 AbstractCegarLoop]: Abstraction has 26322 states and 40996 transitions. [2020-10-14 09:24:12,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:24:12,491 INFO L276 IsEmpty]: Start isEmpty. Operand 26322 states and 40996 transitions. [2020-10-14 09:24:12,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 09:24:12,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:12,494 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 09:24:12,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:24:12,494 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:12,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:12,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1733598109, now seen corresponding path program 1 times [2020-10-14 09:24:12,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:12,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614480913] [2020-10-14 09:24:12,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:12,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:12,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:12,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:12,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 09:24:12,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:24:12,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-14 09:24:12,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:12,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:12,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:24:12,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-14 09:24:12,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 09:24:12,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:12,931 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:24:12,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:12,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:12,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:12,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:12,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:12,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:24:12,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:12,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:12,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:12,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:12,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:12,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:12,950 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 09:24:12,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614480913] [2020-10-14 09:24:12,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:12,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:24:12,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368802973] [2020-10-14 09:24:12,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:24:12,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:12,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:24:12,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:12,952 INFO L87 Difference]: Start difference. First operand 26322 states and 40996 transitions. Second operand 4 states. [2020-10-14 09:24:13,163 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:24:15,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:15,821 INFO L93 Difference]: Finished difference Result 49014 states and 77982 transitions. [2020-10-14 09:24:15,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:24:15,822 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-14 09:24:15,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:15,889 INFO L225 Difference]: With dead ends: 49014 [2020-10-14 09:24:15,890 INFO L226 Difference]: Without dead ends: 35056 [2020-10-14 09:24:15,920 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 09:24:15,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35056 states. [2020-10-14 09:24:17,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35056 to 35054. [2020-10-14 09:24:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35054 states. [2020-10-14 09:24:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35054 states to 35054 states and 55052 transitions. [2020-10-14 09:24:17,944 INFO L78 Accepts]: Start accepts. Automaton has 35054 states and 55052 transitions. Word has length 71 [2020-10-14 09:24:17,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:17,944 INFO L479 AbstractCegarLoop]: Abstraction has 35054 states and 55052 transitions. [2020-10-14 09:24:17,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:24:17,944 INFO L276 IsEmpty]: Start isEmpty. Operand 35054 states and 55052 transitions. [2020-10-14 09:24:17,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 09:24:17,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:17,946 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 09:24:17,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:24:17,947 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:17,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:17,947 INFO L82 PathProgramCache]: Analyzing trace with hash 663886341, now seen corresponding path program 1 times [2020-10-14 09:24:17,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:17,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985753393] [2020-10-14 09:24:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:17,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:17,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:18,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:18,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:18,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 09:24:18,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:24:18,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-14 09:24:18,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:18,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:18,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:24:18,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 09:24:18,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 09:24:18,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:18,568 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:24:18,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:18,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:18,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:18,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:18,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:18,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:24:18,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:18,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:18,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:18,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:18,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:18,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:18,588 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 09:24:18,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985753393] [2020-10-14 09:24:18,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:18,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:24:18,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240783330] [2020-10-14 09:24:18,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:24:18,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:18,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:24:18,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:18,589 INFO L87 Difference]: Start difference. First operand 35054 states and 55052 transitions. Second operand 4 states. [2020-10-14 09:24:21,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:21,654 INFO L93 Difference]: Finished difference Result 80834 states and 128062 transitions. [2020-10-14 09:24:21,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:24:21,655 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-14 09:24:21,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:21,725 INFO L225 Difference]: With dead ends: 80834 [2020-10-14 09:24:21,725 INFO L226 Difference]: Without dead ends: 46524 [2020-10-14 09:24:21,767 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 09:24:21,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46524 states. [2020-10-14 09:24:25,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46524 to 45434. [2020-10-14 09:24:25,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45434 states. [2020-10-14 09:24:25,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45434 states to 45434 states and 71356 transitions. [2020-10-14 09:24:25,438 INFO L78 Accepts]: Start accepts. Automaton has 45434 states and 71356 transitions. Word has length 71 [2020-10-14 09:24:25,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:25,439 INFO L479 AbstractCegarLoop]: Abstraction has 45434 states and 71356 transitions. [2020-10-14 09:24:25,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:24:25,439 INFO L276 IsEmpty]: Start isEmpty. Operand 45434 states and 71356 transitions. [2020-10-14 09:24:25,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 09:24:25,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:25,442 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 09:24:25,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 09:24:25,442 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:25,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:25,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1245914535, now seen corresponding path program 1 times [2020-10-14 09:24:25,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:25,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123017367] [2020-10-14 09:24:25,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:25,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:25,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:25,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:25,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:25,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 09:24:25,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:24:25,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-14 09:24:25,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:25,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:25,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:24:25,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:24:25,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:24:25,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:25,928 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:24:25,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:25,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:25,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:25,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:25,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:25,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:24:25,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:25,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:25,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:25,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:25,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:25,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:25,946 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 09:24:25,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123017367] [2020-10-14 09:24:25,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:25,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:24:25,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347835195] [2020-10-14 09:24:25,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:24:25,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:25,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:24:25,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:24:25,948 INFO L87 Difference]: Start difference. First operand 45434 states and 71356 transitions. Second operand 4 states. [2020-10-14 09:24:31,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:31,257 INFO L93 Difference]: Finished difference Result 136020 states and 213712 transitions. [2020-10-14 09:24:31,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:24:31,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-14 09:24:31,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:31,385 INFO L225 Difference]: With dead ends: 136020 [2020-10-14 09:24:31,385 INFO L226 Difference]: Without dead ends: 90821 [2020-10-14 09:24:31,435 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 09:24:31,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90821 states. [2020-10-14 09:24:35,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90821 to 45437. [2020-10-14 09:24:35,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45437 states. [2020-10-14 09:24:36,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45437 states to 45437 states and 71360 transitions. [2020-10-14 09:24:36,021 INFO L78 Accepts]: Start accepts. Automaton has 45437 states and 71360 transitions. Word has length 71 [2020-10-14 09:24:36,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:36,022 INFO L479 AbstractCegarLoop]: Abstraction has 45437 states and 71360 transitions. [2020-10-14 09:24:36,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:24:36,022 INFO L276 IsEmpty]: Start isEmpty. Operand 45437 states and 71360 transitions. [2020-10-14 09:24:36,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 09:24:36,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:36,025 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 09:24:36,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 09:24:36,026 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:36,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:36,026 INFO L82 PathProgramCache]: Analyzing trace with hash 969254906, now seen corresponding path program 1 times [2020-10-14 09:24:36,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:36,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073149345] [2020-10-14 09:24:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:36,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:36,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:36,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:36,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:36,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 09:24:36,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 09:24:36,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-14 09:24:36,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:36,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:36,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:24:36,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:24:36,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 09:24:36,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:36,645 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:24:36,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:36,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:36,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:36,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:36,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:36,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:24:36,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:36,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:36,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:36,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:36,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:36,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:36,669 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 09:24:36,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073149345] [2020-10-14 09:24:36,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:36,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:24:36,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012117739] [2020-10-14 09:24:36,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:24:36,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:36,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:24:36,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:24:36,671 INFO L87 Difference]: Start difference. First operand 45437 states and 71360 transitions. Second operand 5 states. [2020-10-14 09:24:42,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:24:42,642 INFO L93 Difference]: Finished difference Result 127852 states and 200813 transitions. [2020-10-14 09:24:42,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:24:42,642 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-14 09:24:42,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:24:42,783 INFO L225 Difference]: With dead ends: 127852 [2020-10-14 09:24:42,783 INFO L226 Difference]: Without dead ends: 82882 [2020-10-14 09:24:42,830 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 09:24:42,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82882 states. [2020-10-14 09:24:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82882 to 82880. [2020-10-14 09:24:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82880 states. [2020-10-14 09:24:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82880 states to 82880 states and 129035 transitions. [2020-10-14 09:24:49,294 INFO L78 Accepts]: Start accepts. Automaton has 82880 states and 129035 transitions. Word has length 72 [2020-10-14 09:24:49,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:24:49,294 INFO L479 AbstractCegarLoop]: Abstraction has 82880 states and 129035 transitions. [2020-10-14 09:24:49,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:24:49,295 INFO L276 IsEmpty]: Start isEmpty. Operand 82880 states and 129035 transitions. [2020-10-14 09:24:49,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 09:24:49,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:24:49,299 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 09:24:49,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 09:24:49,299 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:24:49,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:24:49,300 INFO L82 PathProgramCache]: Analyzing trace with hash 2010000323, now seen corresponding path program 1 times [2020-10-14 09:24:49,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:24:49,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139110611] [2020-10-14 09:24:49,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:24:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:49,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:49,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:49,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 09:24:49,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:49,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-14 09:24:49,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:49,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:49,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:24:49,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-14 09:24:49,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 09:24:49,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:49,597 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:24:49,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:24:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:24:49,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:24:49,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:24:49,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:24:49,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:24:49,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:24:49,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:24:49,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:24:49,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:24:49,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:24:49,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:24:49,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:24:49,618 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 09:24:49,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139110611] [2020-10-14 09:24:49,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:24:49,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:24:49,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31129648] [2020-10-14 09:24:49,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:24:49,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:24:49,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:24:49,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:24:49,620 INFO L87 Difference]: Start difference. First operand 82880 states and 129035 transitions. Second operand 6 states. [2020-10-14 09:24:49,836 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 09:25:15,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:25:15,054 INFO L93 Difference]: Finished difference Result 457173 states and 722033 transitions. [2020-10-14 09:25:15,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 09:25:15,055 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-14 09:25:15,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:25:15,722 INFO L225 Difference]: With dead ends: 457173 [2020-10-14 09:25:15,722 INFO L226 Difference]: Without dead ends: 376214 [2020-10-14 09:25:15,843 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 09:25:16,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376214 states. [2020-10-14 09:25:34,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376214 to 160493. [2020-10-14 09:25:34,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160493 states. [2020-10-14 09:25:35,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160493 states to 160493 states and 248234 transitions. [2020-10-14 09:25:35,185 INFO L78 Accepts]: Start accepts. Automaton has 160493 states and 248234 transitions. Word has length 72 [2020-10-14 09:25:35,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:25:35,185 INFO L479 AbstractCegarLoop]: Abstraction has 160493 states and 248234 transitions. [2020-10-14 09:25:35,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:25:35,186 INFO L276 IsEmpty]: Start isEmpty. Operand 160493 states and 248234 transitions. [2020-10-14 09:25:35,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 09:25:35,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:25:35,190 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] [2020-10-14 09:25:35,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 09:25:35,190 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:25:35,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:25:35,191 INFO L82 PathProgramCache]: Analyzing trace with hash 2118857401, now seen corresponding path program 1 times [2020-10-14 09:25:35,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:25:35,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431341395] [2020-10-14 09:25:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:25:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:35,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:35,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:35,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:35,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 09:25:35,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:25:35,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-14 09:25:35,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:35,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:35,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:25:35,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-14 09:25:35,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:25:35,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:35,738 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:25:35,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:25:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:25:35,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:25:35,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:25:35,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:25:35,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:25:35,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:25:35,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:25:35,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:25:35,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:25:35,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:25:35,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:25:35,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:25:35,757 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 09:25:35,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431341395] [2020-10-14 09:25:35,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:25:35,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:25:35,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335023936] [2020-10-14 09:25:35,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:25:35,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:25:35,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:25:35,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:25:35,759 INFO L87 Difference]: Start difference. First operand 160493 states and 248234 transitions. Second operand 5 states. [2020-10-14 09:25:35,971 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:26:08,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:08,130 INFO L93 Difference]: Finished difference Result 548617 states and 857527 transitions. [2020-10-14 09:26:08,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:26:08,130 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-14 09:26:08,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:08,780 INFO L225 Difference]: With dead ends: 548617 [2020-10-14 09:26:08,780 INFO L226 Difference]: Without dead ends: 390045 [2020-10-14 09:26:08,932 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 09:26:09,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390045 states. [2020-10-14 09:26:34,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390045 to 274339. [2020-10-14 09:26:34,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274339 states. [2020-10-14 09:26:35,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274339 states to 274339 states and 424560 transitions. [2020-10-14 09:26:35,164 INFO L78 Accepts]: Start accepts. Automaton has 274339 states and 424560 transitions. Word has length 73 [2020-10-14 09:26:35,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:35,164 INFO L479 AbstractCegarLoop]: Abstraction has 274339 states and 424560 transitions. [2020-10-14 09:26:35,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:26:35,165 INFO L276 IsEmpty]: Start isEmpty. Operand 274339 states and 424560 transitions. [2020-10-14 09:26:35,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 09:26:35,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:35,168 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] [2020-10-14 09:26:35,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 09:26:35,168 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:35,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:35,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1203017546, now seen corresponding path program 1 times [2020-10-14 09:26:35,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:35,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940461917] [2020-10-14 09:26:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:35,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:35,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:35,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:35,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 09:26:35,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 09:26:35,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-14 09:26:35,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:35,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:35,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:26:35,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-14 09:26:35,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:26:35,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:35,676 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:26:35,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:35,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:35,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:35,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:35,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:35,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:26:35,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:35,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:35,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:35,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:35,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:35,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:35,703 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 09:26:35,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940461917] [2020-10-14 09:26:35,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:35,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:26:35,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164705877] [2020-10-14 09:26:35,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:26:35,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:35,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:26:35,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:26:35,705 INFO L87 Difference]: Start difference. First operand 274339 states and 424560 transitions. Second operand 5 states. [2020-10-14 09:26:36,423 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 170