/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/array-programs/copysome1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:24:58,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:24:58,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:24:58,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:24:58,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:24:58,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:24:58,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:24:58,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:24:58,250 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:24:58,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:24:58,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:24:58,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:24:58,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:24:58,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:24:58,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:24:58,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:24:58,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:24:58,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:24:58,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:24:58,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:24:58,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:24:58,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:24:58,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:24:58,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:24:58,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:24:58,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:24:58,295 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:24:58,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:24:58,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:24:58,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:24:58,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:24:58,301 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:24:58,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:24:58,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:24:58,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:24:58,304 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:24:58,304 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:24:58,305 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:24:58,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:24:58,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:24:58,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:24:58,307 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 18:24:58,331 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:24:58,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:24:58,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:24:58,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:24:58,333 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:24:58,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:24:58,333 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:24:58,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:24:58,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:24:58,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:24:58,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:24:58,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:24:58,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:24:58,335 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:24:58,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:24:58,335 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:24:58,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:24:58,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:24:58,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:24:58,336 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:24:58,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:24:58,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:24:58,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:24:58,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:24:58,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:24:58,337 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:24:58,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:24:58,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:24:58,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:24:58,338 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 18:24:58,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:24:58,683 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:24:58,687 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:24:58,689 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:24:58,689 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:24:58,689 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-2.i [2020-10-14 18:24:58,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a2e90ceca/b1bd54b0b67641be922b0491016bd6ec/FLAGdf84bd5ca [2020-10-14 18:24:59,261 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:24:59,262 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-programs/copysome1-2.i [2020-10-14 18:24:59,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a2e90ceca/b1bd54b0b67641be922b0491016bd6ec/FLAGdf84bd5ca [2020-10-14 18:24:59,697 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a2e90ceca/b1bd54b0b67641be922b0491016bd6ec [2020-10-14 18:24:59,706 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:24:59,708 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:24:59,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:24:59,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:24:59,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:24:59,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:24:59" (1/1) ... [2020-10-14 18:24:59,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cd4ce29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:24:59, skipping insertion in model container [2020-10-14 18:24:59,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:24:59" (1/1) ... [2020-10-14 18:24:59,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:24:59,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:24:59,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:24:59,964 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:24:59,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:25:00,008 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:25:00,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:25:00 WrapperNode [2020-10-14 18:25:00,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:25:00,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:25:00,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:25:00,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:25:00,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:25:00" (1/1) ... [2020-10-14 18:25:00,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:25:00" (1/1) ... [2020-10-14 18:25:00,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:25:00" (1/1) ... [2020-10-14 18:25:00,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:25:00" (1/1) ... [2020-10-14 18:25:00,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:25:00" (1/1) ... [2020-10-14 18:25:00,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:25:00" (1/1) ... [2020-10-14 18:25:00,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:25:00" (1/1) ... [2020-10-14 18:25:00,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:25:00,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:25:00,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:25:00,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:25:00,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:25:00" (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 18:25:00,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:25:00,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:25:00,195 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:25:00,195 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:25:00,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:25:00,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:25:00,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 18:25:00,198 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:25:00,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 18:25:00,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 18:25:00,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 18:25:00,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:25:00,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:25:00,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:25:00,501 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:25:00,502 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-14 18:25:00,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:25:00 BoogieIcfgContainer [2020-10-14 18:25:00,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:25:00,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:25:00,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:25:00,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:25:00,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:24:59" (1/3) ... [2020-10-14 18:25:00,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8c8175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:25:00, skipping insertion in model container [2020-10-14 18:25:00,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:25:00" (2/3) ... [2020-10-14 18:25:00,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8c8175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:25:00, skipping insertion in model container [2020-10-14 18:25:00,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:25:00" (3/3) ... [2020-10-14 18:25:00,518 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome1-2.i [2020-10-14 18:25:00,529 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:25:00,536 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:25:00,550 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:25:00,572 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:25:00,572 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:25:00,572 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:25:00,572 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:25:00,573 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:25:00,573 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:25:00,573 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:25:00,573 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:25:00,592 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-14 18:25:00,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 18:25:00,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:00,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:00,600 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:00,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:00,606 INFO L82 PathProgramCache]: Analyzing trace with hash -908266250, now seen corresponding path program 1 times [2020-10-14 18:25:00,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:00,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867587634] [2020-10-14 18:25:00,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:00,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:00,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:00,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:00,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 18:25:00,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:25:00,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-14 18:25:00,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:00,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:00,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:00,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 18:25:00,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:00,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 18:25:01,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:01,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:01,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:01,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:01,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:01,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 18:25:01,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:01,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:01,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:01,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:01,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:01,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:01,037 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 18:25:01,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867587634] [2020-10-14 18:25:01,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:25:01,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 18:25:01,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144779146] [2020-10-14 18:25:01,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 18:25:01,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:01,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 18:25:01,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 18:25:01,063 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-14 18:25:01,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:01,178 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2020-10-14 18:25:01,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 18:25:01,180 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-14 18:25:01,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:01,189 INFO L225 Difference]: With dead ends: 50 [2020-10-14 18:25:01,190 INFO L226 Difference]: Without dead ends: 24 [2020-10-14 18:25:01,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 18:25:01,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-14 18:25:01,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-14 18:25:01,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 18:25:01,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-14 18:25:01,234 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2020-10-14 18:25:01,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:01,235 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-14 18:25:01,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 18:25:01,235 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-14 18:25:01,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 18:25:01,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:01,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:01,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:25:01,237 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:01,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:01,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1720229721, now seen corresponding path program 1 times [2020-10-14 18:25:01,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:01,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169456340] [2020-10-14 18:25:01,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:01,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:01,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:01,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:01,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 18:25:01,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:25:01,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-14 18:25:01,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:01,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:01,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:25:01,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:01,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 18:25:01,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:01,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:01,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:01,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:01,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:01,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:01,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:25:01,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:01,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:01,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:01,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:01,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:01,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:01,526 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 18:25:01,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169456340] [2020-10-14 18:25:01,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:25:01,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 18:25:01,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980468263] [2020-10-14 18:25:01,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 18:25:01,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:01,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 18:25:01,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 18:25:01,530 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2020-10-14 18:25:01,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:01,614 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-10-14 18:25:01,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 18:25:01,614 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-14 18:25:01,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:01,616 INFO L225 Difference]: With dead ends: 45 [2020-10-14 18:25:01,616 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 18:25:01,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 18:25:01,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 18:25:01,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-14 18:25:01,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 18:25:01,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-14 18:25:01,626 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2020-10-14 18:25:01,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:01,627 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-14 18:25:01,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 18:25:01,627 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-14 18:25:01,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 18:25:01,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:01,628 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] [2020-10-14 18:25:01,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:25:01,629 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:01,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:01,629 INFO L82 PathProgramCache]: Analyzing trace with hash -2103920742, now seen corresponding path program 1 times [2020-10-14 18:25:01,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:01,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753660106] [2020-10-14 18:25:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:01,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:01,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:01,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:01,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:02,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:02,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 18:25:02,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:25:02,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-14 18:25:02,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:02,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:02,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:25:02,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:02,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 18:25:02,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:02,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:02,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:02,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:02,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:02,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:02,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:25:02,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:02,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:02,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:02,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:02,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:02,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:25:02,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753660106] [2020-10-14 18:25:02,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:02,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 18:25:02,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723122716] [2020-10-14 18:25:02,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 18:25:02,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:02,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 18:25:02,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 18:25:02,151 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 6 states. [2020-10-14 18:25:02,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:02,332 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-10-14 18:25:02,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 18:25:02,333 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-14 18:25:02,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:02,335 INFO L225 Difference]: With dead ends: 43 [2020-10-14 18:25:02,335 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 18:25:02,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:25:02,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 18:25:02,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-10-14 18:25:02,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 18:25:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-14 18:25:02,350 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2020-10-14 18:25:02,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:02,351 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-14 18:25:02,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 18:25:02,352 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-14 18:25:02,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 18:25:02,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:02,353 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] [2020-10-14 18:25:02,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:25:02,353 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:02,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:02,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1710893732, now seen corresponding path program 1 times [2020-10-14 18:25:02,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:02,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269495203] [2020-10-14 18:25:02,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:02,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:02,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:02,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:02,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:02,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 18:25:02,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:25:03,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 623 [2020-10-14 18:25:03,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:03,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:03,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:25:03,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 18:25:03,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 18:25:03,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:03,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:03,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:03,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:03,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:03,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:03,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:25:03,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:03,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:03,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:03,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:03,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:03,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:25:03,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269495203] [2020-10-14 18:25:03,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:03,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:25:03,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437336696] [2020-10-14 18:25:03,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:25:03,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:03,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:25:03,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:25:03,152 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 9 states. [2020-10-14 18:25:03,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:03,446 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2020-10-14 18:25:03,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:25:03,447 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-14 18:25:03,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:03,450 INFO L225 Difference]: With dead ends: 53 [2020-10-14 18:25:03,450 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 18:25:03,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:25:03,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 18:25:03,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2020-10-14 18:25:03,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 18:25:03,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-14 18:25:03,466 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 21 [2020-10-14 18:25:03,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:03,467 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-14 18:25:03,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:25:03,467 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-14 18:25:03,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 18:25:03,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:03,468 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:03,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:25:03,469 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:03,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:03,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1938360085, now seen corresponding path program 1 times [2020-10-14 18:25:03,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:03,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837818412] [2020-10-14 18:25:03,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:03,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:03,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:03,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:03,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:03,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:03,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 18:25:03,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:25:03,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 369 [2020-10-14 18:25:03,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:03,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:03,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:25:03,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:03,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 18:25:03,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:03,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:03,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:03,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:03,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:03,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:03,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:25:03,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:03,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:03,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:03,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:03,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:03,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:25:03,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837818412] [2020-10-14 18:25:03,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:03,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 18:25:03,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609649701] [2020-10-14 18:25:03,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 18:25:03,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:03,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 18:25:03,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:25:03,903 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 7 states. [2020-10-14 18:25:04,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:04,039 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2020-10-14 18:25:04,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 18:25:04,040 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-14 18:25:04,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:04,042 INFO L225 Difference]: With dead ends: 71 [2020-10-14 18:25:04,042 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 18:25:04,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:25:04,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 18:25:04,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-10-14 18:25:04,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 18:25:04,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-14 18:25:04,051 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2020-10-14 18:25:04,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:04,051 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-14 18:25:04,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 18:25:04,051 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-14 18:25:04,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 18:25:04,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:04,053 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:04,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:25:04,053 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:04,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:04,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1652438966, now seen corresponding path program 2 times [2020-10-14 18:25:04,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:04,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151540117] [2020-10-14 18:25:04,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:04,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:04,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:04,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:04,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:05,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:05,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 18:25:05,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:25:05,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1044 [2020-10-14 18:25:05,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:05,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:05,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:25:05,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:05,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 18:25:05,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:05,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:05,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:05,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:05,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:05,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:05,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:25:05,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:05,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:05,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:05,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:05,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:05,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 18:25:05,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151540117] [2020-10-14 18:25:05,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:05,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:25:05,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923184377] [2020-10-14 18:25:05,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:25:05,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:05,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:25:05,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:25:05,216 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 8 states. [2020-10-14 18:25:05,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:05,393 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2020-10-14 18:25:05,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 18:25:05,394 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-14 18:25:05,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:05,395 INFO L225 Difference]: With dead ends: 67 [2020-10-14 18:25:05,395 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 18:25:05,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:25:05,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 18:25:05,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-10-14 18:25:05,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 18:25:05,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-14 18:25:05,402 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 31 [2020-10-14 18:25:05,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:05,403 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-14 18:25:05,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:25:05,403 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-14 18:25:05,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 18:25:05,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:05,404 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:05,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:25:05,405 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:05,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:05,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1444845839, now seen corresponding path program 3 times [2020-10-14 18:25:05,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:05,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793242599] [2020-10-14 18:25:05,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:05,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:05,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:05,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:05,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:08,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:08,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 18:25:08,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:25:08,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2838 [2020-10-14 18:25:08,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:08,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:08,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:25:08,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:08,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:25:08,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:08,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:08,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:08,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:08,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:08,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:08,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:25:08,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:08,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:08,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:08,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:08,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:08,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 18:25:08,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793242599] [2020-10-14 18:25:08,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:08,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:25:08,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875311868] [2020-10-14 18:25:08,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:25:08,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:08,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:25:08,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:25:08,339 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 9 states. [2020-10-14 18:25:08,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:08,533 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2020-10-14 18:25:08,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:25:08,533 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-14 18:25:08,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:08,535 INFO L225 Difference]: With dead ends: 75 [2020-10-14 18:25:08,535 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 18:25:08,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:25:08,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 18:25:08,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-10-14 18:25:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 18:25:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-10-14 18:25:08,543 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 36 [2020-10-14 18:25:08,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:08,543 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-10-14 18:25:08,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:25:08,543 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-10-14 18:25:08,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 18:25:08,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:08,545 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:08,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:25:08,545 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:08,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:08,546 INFO L82 PathProgramCache]: Analyzing trace with hash -366397486, now seen corresponding path program 4 times [2020-10-14 18:25:08,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:08,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881720684] [2020-10-14 18:25:08,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:08,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:08,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:08,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:08,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:12,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:12,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 18:25:12,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:25:12,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4330 [2020-10-14 18:25:12,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:12,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:12,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:25:12,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:12,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 18:25:12,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:25:13,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:13,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:13,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:13,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:13,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:13,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:25:13,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:13,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:13,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:13,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:13,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:13,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 18:25:13,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881720684] [2020-10-14 18:25:13,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:13,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:25:13,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838039035] [2020-10-14 18:25:13,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:25:13,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:13,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:25:13,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:25:13,019 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 10 states. [2020-10-14 18:25:13,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:13,253 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2020-10-14 18:25:13,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:25:13,254 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-14 18:25:13,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:13,255 INFO L225 Difference]: With dead ends: 83 [2020-10-14 18:25:13,256 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 18:25:13,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:25:13,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 18:25:13,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-10-14 18:25:13,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 18:25:13,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-10-14 18:25:13,271 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 41 [2020-10-14 18:25:13,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:13,271 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-10-14 18:25:13,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:25:13,272 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-10-14 18:25:13,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 18:25:13,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:13,275 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:13,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:25:13,278 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:13,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:13,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1560772907, now seen corresponding path program 5 times [2020-10-14 18:25:13,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:13,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80060837] [2020-10-14 18:25:13,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:13,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:13,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:13,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:13,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:18,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:18,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 18:25:18,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:25:18,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 18:25:18,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:18,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:18,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:25:18,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:18,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:25:18,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:25:18,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:18,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:18,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:18,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:18,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:18,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:25:18,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:18,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:18,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:18,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:18,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:18,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 18:25:18,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80060837] [2020-10-14 18:25:18,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:18,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:25:18,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138609845] [2020-10-14 18:25:18,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:25:18,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:18,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:25:18,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:25:18,433 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 11 states. [2020-10-14 18:25:18,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:18,668 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2020-10-14 18:25:18,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:25:18,669 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-10-14 18:25:18,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:18,670 INFO L225 Difference]: With dead ends: 91 [2020-10-14 18:25:18,670 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 18:25:18,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:25:18,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 18:25:18,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-10-14 18:25:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 18:25:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-10-14 18:25:18,677 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 46 [2020-10-14 18:25:18,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:18,678 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-10-14 18:25:18,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:25:18,678 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-10-14 18:25:18,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 18:25:18,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:18,679 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:18,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:25:18,680 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:18,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:18,680 INFO L82 PathProgramCache]: Analyzing trace with hash -835225618, now seen corresponding path program 6 times [2020-10-14 18:25:18,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:18,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591285330] [2020-10-14 18:25:18,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:18,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:18,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:18,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:18,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:23,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:23,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 18:25:23,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:25:23,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 18:25:23,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:23,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:23,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:25:23,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:23,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 18:25:23,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:23,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:23,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:23,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:23,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:23,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:23,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:25:23,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:23,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:23,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:23,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:23,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:23,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-14 18:25:23,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591285330] [2020-10-14 18:25:23,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:23,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:25:23,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389507626] [2020-10-14 18:25:23,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:25:23,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:23,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:25:23,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:25:23,857 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 12 states. [2020-10-14 18:25:24,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:24,120 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2020-10-14 18:25:24,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:25:24,121 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-14 18:25:24,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:24,122 INFO L225 Difference]: With dead ends: 99 [2020-10-14 18:25:24,122 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 18:25:24,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:25:24,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 18:25:24,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-10-14 18:25:24,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 18:25:24,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2020-10-14 18:25:24,137 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 51 [2020-10-14 18:25:24,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:24,138 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2020-10-14 18:25:24,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:25:24,138 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2020-10-14 18:25:24,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 18:25:24,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:24,139 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:24,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:25:24,139 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:24,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:24,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1861056185, now seen corresponding path program 7 times [2020-10-14 18:25:24,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:24,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915445237] [2020-10-14 18:25:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:24,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:24,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:24,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:24,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:29,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:29,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 18:25:29,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:25:29,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 18:25:29,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:29,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:29,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:25:29,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:29,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 18:25:29,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:29,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:29,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:29,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:29,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:29,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:29,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:25:29,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:29,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:29,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:29,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:29,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:29,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:25:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 18:25:29,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915445237] [2020-10-14 18:25:29,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:29,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:25:29,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877732304] [2020-10-14 18:25:29,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:25:29,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:29,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:25:29,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:25:29,309 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand 13 states. [2020-10-14 18:25:29,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:29,591 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2020-10-14 18:25:29,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:25:29,592 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-14 18:25:29,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:29,593 INFO L225 Difference]: With dead ends: 99 [2020-10-14 18:25:29,593 INFO L226 Difference]: Without dead ends: 87 [2020-10-14 18:25:29,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:25:29,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-14 18:25:29,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2020-10-14 18:25:29,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 18:25:29,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2020-10-14 18:25:29,600 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 56 [2020-10-14 18:25:29,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:29,600 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2020-10-14 18:25:29,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:25:29,601 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2020-10-14 18:25:29,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 18:25:29,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:29,602 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:29,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:25:29,602 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:29,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:29,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1159456311, now seen corresponding path program 2 times [2020-10-14 18:25:29,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:29,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519200846] [2020-10-14 18:25:29,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:29,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:29,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:31,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:34,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:34,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 18:25:34,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:25:34,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:25:34,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:34,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:34,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:25:34,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:34,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:25:34,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:25:35,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:35,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:35,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:35,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:35,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:35,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:25:35,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:35,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:35,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:35,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:35,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:35,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:25:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-10-14 18:25:35,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519200846] [2020-10-14 18:25:35,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:35,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:25:35,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210096815] [2020-10-14 18:25:35,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:25:35,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:35,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:25:35,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:25:35,096 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand 10 states. [2020-10-14 18:25:35,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:35,341 INFO L93 Difference]: Finished difference Result 109 states and 133 transitions. [2020-10-14 18:25:35,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:25:35,342 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-10-14 18:25:35,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:35,343 INFO L225 Difference]: With dead ends: 109 [2020-10-14 18:25:35,344 INFO L226 Difference]: Without dead ends: 107 [2020-10-14 18:25:35,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:25:35,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-14 18:25:35,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2020-10-14 18:25:35,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-14 18:25:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2020-10-14 18:25:35,357 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 56 [2020-10-14 18:25:35,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:35,357 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2020-10-14 18:25:35,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:25:35,357 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2020-10-14 18:25:35,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 18:25:35,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:35,359 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:35,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:25:35,359 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:35,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:35,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1501302420, now seen corresponding path program 8 times [2020-10-14 18:25:35,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:35,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078684228] [2020-10-14 18:25:35,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:35,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:35,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:35,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:37,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:40,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:40,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 18:25:40,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:25:40,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:25:40,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:40,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:40,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:25:40,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:40,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 18:25:40,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:25:40,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:40,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:40,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:40,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:40,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:40,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:25:40,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:40,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:40,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:40,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:40,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:40,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:25:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 18:25:40,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078684228] [2020-10-14 18:25:40,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:40,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:25:40,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27416930] [2020-10-14 18:25:40,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:25:40,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:40,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:25:40,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:25:40,536 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 14 states. [2020-10-14 18:25:40,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:40,889 INFO L93 Difference]: Finished difference Result 186 states and 236 transitions. [2020-10-14 18:25:40,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:25:40,889 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-14 18:25:40,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:40,894 INFO L225 Difference]: With dead ends: 186 [2020-10-14 18:25:40,894 INFO L226 Difference]: Without dead ends: 111 [2020-10-14 18:25:40,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:25:40,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-14 18:25:40,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2020-10-14 18:25:40,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-14 18:25:40,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 130 transitions. [2020-10-14 18:25:40,905 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 130 transitions. Word has length 59 [2020-10-14 18:25:40,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:40,905 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 130 transitions. [2020-10-14 18:25:40,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:25:40,905 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 130 transitions. [2020-10-14 18:25:40,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 18:25:40,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:40,907 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:40,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:25:40,907 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:40,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:40,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1799626117, now seen corresponding path program 9 times [2020-10-14 18:25:40,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:40,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638886951] [2020-10-14 18:25:40,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:40,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:40,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:41,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:41,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:45,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:45,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 18:25:45,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:25:45,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:25:45,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:45,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:45,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:25:45,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:45,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:25:45,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:25:46,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:46,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:46,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:46,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:46,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:46,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:25:46,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:46,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:46,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:46,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:46,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:46,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-14 18:25:46,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638886951] [2020-10-14 18:25:46,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:46,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:25:46,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93404265] [2020-10-14 18:25:46,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:25:46,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:46,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:25:46,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:25:46,093 INFO L87 Difference]: Start difference. First operand 106 states and 130 transitions. Second operand 15 states. [2020-10-14 18:25:46,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:46,478 INFO L93 Difference]: Finished difference Result 200 states and 254 transitions. [2020-10-14 18:25:46,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 18:25:46,479 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-10-14 18:25:46,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:46,480 INFO L225 Difference]: With dead ends: 200 [2020-10-14 18:25:46,481 INFO L226 Difference]: Without dead ends: 119 [2020-10-14 18:25:46,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:25:46,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-14 18:25:46,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2020-10-14 18:25:46,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-14 18:25:46,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 140 transitions. [2020-10-14 18:25:46,492 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 140 transitions. Word has length 64 [2020-10-14 18:25:46,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:46,492 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 140 transitions. [2020-10-14 18:25:46,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:25:46,493 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 140 transitions. [2020-10-14 18:25:46,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 18:25:46,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:46,494 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:46,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:25:46,494 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:46,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:46,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1649090312, now seen corresponding path program 10 times [2020-10-14 18:25:46,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:46,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143096815] [2020-10-14 18:25:46,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:46,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:46,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:46,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:48,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:51,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:51,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 18:25:51,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:25:51,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 18:25:51,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:51,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:51,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:25:51,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:51,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 18:25:51,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:25:51,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:51,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:51,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:51,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:51,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:51,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:25:51,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:51,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:51,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:51,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:51,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:51,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 18:25:51,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143096815] [2020-10-14 18:25:51,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:51,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:25:51,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421549697] [2020-10-14 18:25:51,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:25:51,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:51,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:25:51,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:25:51,773 INFO L87 Difference]: Start difference. First operand 114 states and 140 transitions. Second operand 16 states. [2020-10-14 18:25:52,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:52,313 INFO L93 Difference]: Finished difference Result 214 states and 272 transitions. [2020-10-14 18:25:52,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:25:52,314 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-10-14 18:25:52,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:52,315 INFO L225 Difference]: With dead ends: 214 [2020-10-14 18:25:52,315 INFO L226 Difference]: Without dead ends: 127 [2020-10-14 18:25:52,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:25:52,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-14 18:25:52,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 122. [2020-10-14 18:25:52,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-14 18:25:52,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 150 transitions. [2020-10-14 18:25:52,338 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 150 transitions. Word has length 69 [2020-10-14 18:25:52,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:52,341 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 150 transitions. [2020-10-14 18:25:52,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:25:52,342 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 150 transitions. [2020-10-14 18:25:52,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 18:25:52,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:52,344 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:52,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:25:52,344 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:52,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:52,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1432001759, now seen corresponding path program 11 times [2020-10-14 18:25:52,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:52,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831553732] [2020-10-14 18:25:52,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:52,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:52,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:52,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:56,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:57,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:57,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 18:25:57,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:25:57,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 18:25:57,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:57,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:25:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:25:57,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 18:25:57,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:25:57,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:25:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:57,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:57,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:25:57,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:25:57,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:25:57,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:25:57,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:25:57,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:25:57,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:25:57,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:25:57,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:25:57,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:25:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-14 18:25:57,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831553732] [2020-10-14 18:25:57,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:25:57,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:25:57,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532843563] [2020-10-14 18:25:57,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:25:57,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:25:57,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:25:57,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:25:57,634 INFO L87 Difference]: Start difference. First operand 122 states and 150 transitions. Second operand 17 states. [2020-10-14 18:25:58,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:25:58,109 INFO L93 Difference]: Finished difference Result 262 states and 336 transitions. [2020-10-14 18:25:58,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:25:58,109 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 74 [2020-10-14 18:25:58,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:25:58,111 INFO L225 Difference]: With dead ends: 262 [2020-10-14 18:25:58,111 INFO L226 Difference]: Without dead ends: 169 [2020-10-14 18:25:58,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:25:58,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-14 18:25:58,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 132. [2020-10-14 18:25:58,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-14 18:25:58,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 162 transitions. [2020-10-14 18:25:58,122 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 162 transitions. Word has length 74 [2020-10-14 18:25:58,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:25:58,123 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 162 transitions. [2020-10-14 18:25:58,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:25:58,123 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 162 transitions. [2020-10-14 18:25:58,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 18:25:58,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:25:58,124 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:25:58,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:25:58,124 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:25:58,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:25:58,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1650407490, now seen corresponding path program 12 times [2020-10-14 18:25:58,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:25:58,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044871565] [2020-10-14 18:25:58,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:25:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:25:58,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:58,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:25:58,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:03,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:03,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 18:26:03,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:26:03,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 18:26:03,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:03,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:03,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:26:03,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-14 18:26:03,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 18:26:03,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:03,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:03,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:03,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:03,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:03,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:03,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:26:03,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:03,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:03,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:03,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:03,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:03,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-14 18:26:03,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044871565] [2020-10-14 18:26:03,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:03,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:26:03,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077353006] [2020-10-14 18:26:03,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:26:03,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:03,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:26:03,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:26:03,372 INFO L87 Difference]: Start difference. First operand 132 states and 162 transitions. Second operand 17 states. [2020-10-14 18:26:03,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:26:03,673 INFO L93 Difference]: Finished difference Result 804 states and 1046 transitions. [2020-10-14 18:26:03,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:26:03,673 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2020-10-14 18:26:03,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:26:03,678 INFO L225 Difference]: With dead ends: 804 [2020-10-14 18:26:03,678 INFO L226 Difference]: Without dead ends: 705 [2020-10-14 18:26:03,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:26:03,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2020-10-14 18:26:03,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 140. [2020-10-14 18:26:03,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-14 18:26:03,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 172 transitions. [2020-10-14 18:26:03,700 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 172 transitions. Word has length 81 [2020-10-14 18:26:03,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:26:03,700 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 172 transitions. [2020-10-14 18:26:03,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:26:03,700 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 172 transitions. [2020-10-14 18:26:03,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 18:26:03,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:26:03,701 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:26:03,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 18:26:03,702 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:26:03,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:26:03,702 INFO L82 PathProgramCache]: Analyzing trace with hash 667236771, now seen corresponding path program 13 times [2020-10-14 18:26:03,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:26:03,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239975813] [2020-10-14 18:26:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:26:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:03,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:03,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:03,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:03,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:04,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:05,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:07,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:08,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:08,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 18:26:08,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:26:08,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-14 18:26:08,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:08,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:08,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:26:08,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:26:08,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 18:26:08,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:08,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:08,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:08,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:08,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:08,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:08,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:08,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:08,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:08,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:08,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:08,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:08,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-14 18:26:08,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239975813] [2020-10-14 18:26:08,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:08,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:26:08,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817794898] [2020-10-14 18:26:08,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:26:08,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:08,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:26:08,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:26:08,987 INFO L87 Difference]: Start difference. First operand 140 states and 172 transitions. Second operand 18 states. [2020-10-14 18:26:09,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:26:09,435 INFO L93 Difference]: Finished difference Result 241 states and 303 transitions. [2020-10-14 18:26:09,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:26:09,435 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 86 [2020-10-14 18:26:09,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:26:09,437 INFO L225 Difference]: With dead ends: 241 [2020-10-14 18:26:09,437 INFO L226 Difference]: Without dead ends: 221 [2020-10-14 18:26:09,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:26:09,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-14 18:26:09,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 140. [2020-10-14 18:26:09,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-14 18:26:09,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 172 transitions. [2020-10-14 18:26:09,471 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 172 transitions. Word has length 86 [2020-10-14 18:26:09,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:26:09,471 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 172 transitions. [2020-10-14 18:26:09,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:26:09,472 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 172 transitions. [2020-10-14 18:26:09,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 18:26:09,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:26:09,473 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:26:09,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 18:26:09,474 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:26:09,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:26:09,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1261035931, now seen corresponding path program 14 times [2020-10-14 18:26:09,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:26:09,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814036652] [2020-10-14 18:26:09,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:26:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:09,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:09,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:09,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:13,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:14,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:14,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 18:26:14,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:26:14,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 18:26:14,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:14,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:14,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:26:14,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:26:14,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 18:26:14,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:14,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:14,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:14,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:14,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:14,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:14,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:14,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:14,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:14,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:14,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:14,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:14,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-14 18:26:14,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814036652] [2020-10-14 18:26:14,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:14,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:26:14,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298485673] [2020-10-14 18:26:14,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:26:14,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:14,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:26:14,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:26:14,751 INFO L87 Difference]: Start difference. First operand 140 states and 172 transitions. Second operand 19 states. [2020-10-14 18:26:15,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:26:15,290 INFO L93 Difference]: Finished difference Result 258 states and 328 transitions. [2020-10-14 18:26:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:26:15,291 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2020-10-14 18:26:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:26:15,292 INFO L225 Difference]: With dead ends: 258 [2020-10-14 18:26:15,292 INFO L226 Difference]: Without dead ends: 153 [2020-10-14 18:26:15,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:26:15,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-14 18:26:15,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 148. [2020-10-14 18:26:15,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-14 18:26:15,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 182 transitions. [2020-10-14 18:26:15,313 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 182 transitions. Word has length 86 [2020-10-14 18:26:15,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:26:15,314 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 182 transitions. [2020-10-14 18:26:15,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:26:15,314 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 182 transitions. [2020-10-14 18:26:15,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-14 18:26:15,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:26:15,317 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:26:15,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 18:26:15,318 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:26:15,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:26:15,318 INFO L82 PathProgramCache]: Analyzing trace with hash -198969250, now seen corresponding path program 15 times [2020-10-14 18:26:15,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:26:15,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204369062] [2020-10-14 18:26:15,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:26:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:15,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:15,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:15,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:20,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:20,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-14 18:26:20,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:26:20,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 18:26:20,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:20,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:20,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:26:20,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-14 18:26:20,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 18:26:20,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:20,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:20,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:20,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:20,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:20,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:20,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:20,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:20,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:20,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:20,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:20,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:20,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-14 18:26:20,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204369062] [2020-10-14 18:26:20,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:20,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:26:20,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636088381] [2020-10-14 18:26:20,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:26:20,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:20,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:26:20,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:26:20,575 INFO L87 Difference]: Start difference. First operand 148 states and 182 transitions. Second operand 19 states. [2020-10-14 18:26:20,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:26:20,960 INFO L93 Difference]: Finished difference Result 1010 states and 1318 transitions. [2020-10-14 18:26:20,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:26:20,961 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2020-10-14 18:26:20,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:26:20,970 INFO L225 Difference]: With dead ends: 1010 [2020-10-14 18:26:20,970 INFO L226 Difference]: Without dead ends: 899 [2020-10-14 18:26:20,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:26:20,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2020-10-14 18:26:20,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 156. [2020-10-14 18:26:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-14 18:26:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 192 transitions. [2020-10-14 18:26:20,999 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 192 transitions. Word has length 91 [2020-10-14 18:26:21,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:26:21,000 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 192 transitions. [2020-10-14 18:26:21,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:26:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 192 transitions. [2020-10-14 18:26:21,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 18:26:21,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:26:21,003 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:26:21,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 18:26:21,004 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:26:21,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:26:21,004 INFO L82 PathProgramCache]: Analyzing trace with hash 340413191, now seen corresponding path program 16 times [2020-10-14 18:26:21,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:26:21,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468532777] [2020-10-14 18:26:21,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:26:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:21,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:21,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:21,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:21,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:24,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:26,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:26,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 18:26:26,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:26:26,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 18:26:26,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:26,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:26,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:26:26,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:26:26,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:26:26,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:26,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:26,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:26,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:26,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:26,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:26,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:26,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:26,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:26,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:26,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:26,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:26,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 73 proven. 2 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2020-10-14 18:26:26,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468532777] [2020-10-14 18:26:26,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:26,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 18:26:26,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31053294] [2020-10-14 18:26:26,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 18:26:26,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:26,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 18:26:26,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 18:26:26,093 INFO L87 Difference]: Start difference. First operand 156 states and 192 transitions. Second operand 6 states. [2020-10-14 18:26:26,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:26:26,212 INFO L93 Difference]: Finished difference Result 222 states and 276 transitions. [2020-10-14 18:26:26,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 18:26:26,212 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2020-10-14 18:26:26,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:26:26,214 INFO L225 Difference]: With dead ends: 222 [2020-10-14 18:26:26,214 INFO L226 Difference]: Without dead ends: 111 [2020-10-14 18:26:26,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:26:26,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-14 18:26:26,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-10-14 18:26:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-14 18:26:26,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 129 transitions. [2020-10-14 18:26:26,226 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 129 transitions. Word has length 96 [2020-10-14 18:26:26,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:26:26,226 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 129 transitions. [2020-10-14 18:26:26,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 18:26:26,226 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 129 transitions. [2020-10-14 18:26:26,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-14 18:26:26,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:26:26,228 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:26:26,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 18:26:26,228 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:26:26,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:26:26,228 INFO L82 PathProgramCache]: Analyzing trace with hash -213292843, now seen corresponding path program 1 times [2020-10-14 18:26:26,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:26:26,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481088519] [2020-10-14 18:26:26,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:26:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:26,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:26,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:31,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:31,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-14 18:26:31,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:26:31,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-14 18:26:31,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:31,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:31,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:26:31,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-14 18:26:31,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 18:26:31,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:31,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:31,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:31,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:31,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:31,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:31,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:31,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:31,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:31,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:31,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:31,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:31,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2020-10-14 18:26:31,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481088519] [2020-10-14 18:26:31,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:31,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:26:31,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468688133] [2020-10-14 18:26:31,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:26:31,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:31,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:26:31,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:26:31,548 INFO L87 Difference]: Start difference. First operand 111 states and 129 transitions. Second operand 20 states. [2020-10-14 18:26:31,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:26:31,881 INFO L93 Difference]: Finished difference Result 557 states and 698 transitions. [2020-10-14 18:26:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:26:31,884 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 99 [2020-10-14 18:26:31,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:26:31,887 INFO L225 Difference]: With dead ends: 557 [2020-10-14 18:26:31,888 INFO L226 Difference]: Without dead ends: 485 [2020-10-14 18:26:31,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:26:31,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-10-14 18:26:31,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 116. [2020-10-14 18:26:31,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-14 18:26:31,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 135 transitions. [2020-10-14 18:26:31,904 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 135 transitions. Word has length 99 [2020-10-14 18:26:31,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:26:31,905 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 135 transitions. [2020-10-14 18:26:31,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:26:31,905 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 135 transitions. [2020-10-14 18:26:31,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-14 18:26:31,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:26:31,906 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:26:31,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 18:26:31,906 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:26:31,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:26:31,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1829477182, now seen corresponding path program 1 times [2020-10-14 18:26:31,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:26:31,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459138638] [2020-10-14 18:26:31,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:26:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:31,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:31,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:32,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:36,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:36,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-14 18:26:36,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:26:36,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-14 18:26:36,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:36,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:36,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:26:36,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:26:36,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 18:26:36,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:36,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:36,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:36,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:36,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:36,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:36,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:36,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:36,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:36,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:36,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:36,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:36,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:37,005 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 117 proven. 7 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2020-10-14 18:26:37,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459138638] [2020-10-14 18:26:37,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:37,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 18:26:37,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164028617] [2020-10-14 18:26:37,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 18:26:37,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:37,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 18:26:37,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:26:37,010 INFO L87 Difference]: Start difference. First operand 116 states and 135 transitions. Second operand 7 states. [2020-10-14 18:26:37,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:26:37,155 INFO L93 Difference]: Finished difference Result 179 states and 214 transitions. [2020-10-14 18:26:37,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 18:26:37,156 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 104 [2020-10-14 18:26:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:26:37,157 INFO L225 Difference]: With dead ends: 179 [2020-10-14 18:26:37,157 INFO L226 Difference]: Without dead ends: 116 [2020-10-14 18:26:37,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:26:37,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-14 18:26:37,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-10-14 18:26:37,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-14 18:26:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2020-10-14 18:26:37,174 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 104 [2020-10-14 18:26:37,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:26:37,175 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2020-10-14 18:26:37,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 18:26:37,175 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2020-10-14 18:26:37,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-14 18:26:37,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:26:37,176 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:26:37,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 18:26:37,177 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:26:37,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:26:37,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1078704704, now seen corresponding path program 2 times [2020-10-14 18:26:37,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:26:37,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67707101] [2020-10-14 18:26:37,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:26:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:37,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:37,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:42,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:42,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-14 18:26:42,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:26:42,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-14 18:26:42,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:42,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:42,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:26:42,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-14 18:26:42,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 18:26:42,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:42,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:42,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:42,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:42,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:42,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:42,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:42,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:42,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:42,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:42,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:42,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:42,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-10-14 18:26:42,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67707101] [2020-10-14 18:26:42,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:42,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:26:42,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534818917] [2020-10-14 18:26:42,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:26:42,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:42,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:26:42,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:26:42,501 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand 21 states. [2020-10-14 18:26:42,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:26:42,912 INFO L93 Difference]: Finished difference Result 565 states and 706 transitions. [2020-10-14 18:26:42,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:26:42,912 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-10-14 18:26:42,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:26:42,915 INFO L225 Difference]: With dead ends: 565 [2020-10-14 18:26:42,915 INFO L226 Difference]: Without dead ends: 490 [2020-10-14 18:26:42,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:26:42,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-10-14 18:26:42,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 121. [2020-10-14 18:26:42,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 18:26:42,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2020-10-14 18:26:42,936 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 104 [2020-10-14 18:26:42,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:26:42,936 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2020-10-14 18:26:42,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:26:42,937 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2020-10-14 18:26:42,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-14 18:26:42,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:26:42,938 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:26:42,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 18:26:42,938 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:26:42,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:26:42,939 INFO L82 PathProgramCache]: Analyzing trace with hash 337274739, now seen corresponding path program 2 times [2020-10-14 18:26:42,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:26:42,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791896415] [2020-10-14 18:26:42,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:26:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:42,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:42,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:43,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:48,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:48,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-14 18:26:48,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:26:48,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5081 [2020-10-14 18:26:48,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:48,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:48,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:26:48,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:26:48,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-14 18:26:48,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:48,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:48,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:48,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:48,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:48,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:48,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:48,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:48,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:48,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:48,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:48,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:48,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2020-10-14 18:26:48,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791896415] [2020-10-14 18:26:48,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:48,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:26:48,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984010071] [2020-10-14 18:26:48,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:26:48,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:48,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:26:48,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:26:48,293 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 20 states. [2020-10-14 18:26:48,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:26:48,913 INFO L93 Difference]: Finished difference Result 183 states and 219 transitions. [2020-10-14 18:26:48,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:26:48,914 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 109 [2020-10-14 18:26:48,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:26:48,916 INFO L225 Difference]: With dead ends: 183 [2020-10-14 18:26:48,916 INFO L226 Difference]: Without dead ends: 164 [2020-10-14 18:26:48,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:26:48,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-14 18:26:48,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 121. [2020-10-14 18:26:48,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 18:26:48,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2020-10-14 18:26:48,944 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 109 [2020-10-14 18:26:48,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:26:48,945 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2020-10-14 18:26:48,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:26:48,945 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2020-10-14 18:26:48,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-14 18:26:48,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:26:48,956 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:26:48,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 18:26:48,956 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:26:48,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:26:48,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1049510671, now seen corresponding path program 3 times [2020-10-14 18:26:48,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:26:48,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175727856] [2020-10-14 18:26:48,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:26:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:49,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:49,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:54,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:54,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-14 18:26:54,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:26:54,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-14 18:26:54,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:54,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:54,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:26:54,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 18:26:54,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 18:26:54,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:54,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:26:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:54,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:54,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:54,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:26:54,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:26:54,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:26:54,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:54,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:54,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:26:54,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:26:54,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:26:54,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:26:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2020-10-14 18:26:54,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175727856] [2020-10-14 18:26:54,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:26:54,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:26:54,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44959188] [2020-10-14 18:26:54,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:26:54,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:26:54,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:26:54,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:26:54,339 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 22 states. [2020-10-14 18:26:54,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:26:54,793 INFO L93 Difference]: Finished difference Result 622 states and 780 transitions. [2020-10-14 18:26:54,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:26:54,794 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 109 [2020-10-14 18:26:54,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:26:54,797 INFO L225 Difference]: With dead ends: 622 [2020-10-14 18:26:54,798 INFO L226 Difference]: Without dead ends: 544 [2020-10-14 18:26:54,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:26:54,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2020-10-14 18:26:54,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 126. [2020-10-14 18:26:54,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-14 18:26:54,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2020-10-14 18:26:54,825 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 109 [2020-10-14 18:26:54,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:26:54,826 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2020-10-14 18:26:54,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:26:54,826 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2020-10-14 18:26:54,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-14 18:26:54,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:26:54,827 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:26:54,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 18:26:54,828 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:26:54,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:26:54,828 INFO L82 PathProgramCache]: Analyzing trace with hash 356019298, now seen corresponding path program 3 times [2020-10-14 18:26:54,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:26:54,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435127921] [2020-10-14 18:26:54,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:26:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:26:54,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:54,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:54,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:55,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:26:59,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:26:59,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 18:26:59,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:26:59,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-14 18:26:59,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:26:59,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:26:59,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:26:59,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:26:59,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-14 18:26:59,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:00,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:27:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:00,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:00,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:00,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:27:00,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:00,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:00,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:00,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:00,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:00,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:27:00,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:00,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 517 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-10-14 18:27:00,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435127921] [2020-10-14 18:27:00,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:27:00,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:27:00,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211501350] [2020-10-14 18:27:00,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:27:00,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:27:00,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:27:00,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:27:00,162 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand 21 states. [2020-10-14 18:27:00,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:27:00,786 INFO L93 Difference]: Finished difference Result 191 states and 229 transitions. [2020-10-14 18:27:00,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:27:00,786 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 114 [2020-10-14 18:27:00,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:27:00,788 INFO L225 Difference]: With dead ends: 191 [2020-10-14 18:27:00,788 INFO L226 Difference]: Without dead ends: 172 [2020-10-14 18:27:00,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:27:00,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-14 18:27:00,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-14 18:27:00,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-14 18:27:00,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2020-10-14 18:27:00,815 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 114 [2020-10-14 18:27:00,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:27:00,815 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2020-10-14 18:27:00,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:27:00,815 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2020-10-14 18:27:00,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-14 18:27:00,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:27:00,816 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:27:00,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 18:27:00,817 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:27:00,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:27:00,817 INFO L82 PathProgramCache]: Analyzing trace with hash -77709788, now seen corresponding path program 4 times [2020-10-14 18:27:00,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:27:00,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138816432] [2020-10-14 18:27:00,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:27:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:00,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:00,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:05,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:05,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 18:27:05,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:27:05,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 18:27:05,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:05,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:05,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:27:05,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-14 18:27:05,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 18:27:05,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:06,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:27:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:06,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:06,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:06,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:27:06,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:06,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:06,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:06,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:06,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:06,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:27:06,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:06,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:06,188 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-10-14 18:27:06,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138816432] [2020-10-14 18:27:06,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:27:06,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 18:27:06,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952361734] [2020-10-14 18:27:06,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 18:27:06,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:27:06,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 18:27:06,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:27:06,190 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand 23 states. [2020-10-14 18:27:06,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:27:06,712 INFO L93 Difference]: Finished difference Result 682 states and 858 transitions. [2020-10-14 18:27:06,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 18:27:06,713 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 114 [2020-10-14 18:27:06,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:27:06,717 INFO L225 Difference]: With dead ends: 682 [2020-10-14 18:27:06,717 INFO L226 Difference]: Without dead ends: 601 [2020-10-14 18:27:06,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:27:06,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2020-10-14 18:27:06,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 131. [2020-10-14 18:27:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-14 18:27:06,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 152 transitions. [2020-10-14 18:27:06,750 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 152 transitions. Word has length 114 [2020-10-14 18:27:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:27:06,750 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 152 transitions. [2020-10-14 18:27:06,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 18:27:06,751 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 152 transitions. [2020-10-14 18:27:06,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-14 18:27:06,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:27:06,752 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:27:06,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 18:27:06,753 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:27:06,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:27:06,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1543040497, now seen corresponding path program 4 times [2020-10-14 18:27:06,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:27:06,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000060754] [2020-10-14 18:27:06,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:27:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:06,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:06,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:07,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:11,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:11,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-14 18:27:11,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:27:11,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-14 18:27:11,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:11,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:11,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:27:11,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:27:11,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-14 18:27:11,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:12,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:27:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:12,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:12,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:12,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:27:12,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:12,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:27:12,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:12,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:12,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:12,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:27:12,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:12,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 575 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2020-10-14 18:27:12,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000060754] [2020-10-14 18:27:12,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:27:12,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:27:12,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524204793] [2020-10-14 18:27:12,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:27:12,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:27:12,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:27:12,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:27:12,162 INFO L87 Difference]: Start difference. First operand 131 states and 152 transitions. Second operand 22 states. [2020-10-14 18:27:12,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:27:12,844 INFO L93 Difference]: Finished difference Result 199 states and 239 transitions. [2020-10-14 18:27:12,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:27:12,845 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 119 [2020-10-14 18:27:12,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:27:12,847 INFO L225 Difference]: With dead ends: 199 [2020-10-14 18:27:12,847 INFO L226 Difference]: Without dead ends: 180 [2020-10-14 18:27:12,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:27:12,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-14 18:27:12,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 131. [2020-10-14 18:27:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-14 18:27:12,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 152 transitions. [2020-10-14 18:27:12,875 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 152 transitions. Word has length 119 [2020-10-14 18:27:12,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:27:12,875 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 152 transitions. [2020-10-14 18:27:12,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:27:12,875 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 152 transitions. [2020-10-14 18:27:12,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-14 18:27:12,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:27:12,876 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:27:12,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 18:27:12,877 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:27:12,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:27:12,877 INFO L82 PathProgramCache]: Analyzing trace with hash 790352141, now seen corresponding path program 5 times [2020-10-14 18:27:12,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:27:12,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550410454] [2020-10-14 18:27:12,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:27:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:12,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:12,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:17,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:17,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-14 18:27:17,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:27:17,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-14 18:27:17,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:17,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:17,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:27:17,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 18:27:17,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 18:27:17,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:18,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:27:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:18,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:18,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:18,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:27:18,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:18,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:18,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:18,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:18,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:18,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:27:18,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:18,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:27:18,329 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2020-10-14 18:27:18,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550410454] [2020-10-14 18:27:18,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:27:18,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 18:27:18,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192955688] [2020-10-14 18:27:18,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 18:27:18,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:27:18,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 18:27:18,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:27:18,332 INFO L87 Difference]: Start difference. First operand 131 states and 152 transitions. Second operand 24 states. [2020-10-14 18:27:18,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:27:18,981 INFO L93 Difference]: Finished difference Result 745 states and 940 transitions. [2020-10-14 18:27:18,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:27:18,982 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 119 [2020-10-14 18:27:18,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:27:18,987 INFO L225 Difference]: With dead ends: 745 [2020-10-14 18:27:18,987 INFO L226 Difference]: Without dead ends: 661 [2020-10-14 18:27:18,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:27:18,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2020-10-14 18:27:19,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 136. [2020-10-14 18:27:19,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-14 18:27:19,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 158 transitions. [2020-10-14 18:27:19,041 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 158 transitions. Word has length 119 [2020-10-14 18:27:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:27:19,041 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 158 transitions. [2020-10-14 18:27:19,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 18:27:19,041 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 158 transitions. [2020-10-14 18:27:19,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-14 18:27:19,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:27:19,044 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:27:19,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 18:27:19,044 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:27:19,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:27:19,045 INFO L82 PathProgramCache]: Analyzing trace with hash -36558394, now seen corresponding path program 5 times [2020-10-14 18:27:19,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:27:19,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738603446] [2020-10-14 18:27:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:27:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:19,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:19,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:24,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:24,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-14 18:27:24,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:27:24,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:27:24,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:24,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:24,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:27:24,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:27:24,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 18:27:24,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:24,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:27:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:24,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:24,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:24,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:27:24,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:24,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:24,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:24,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:24,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:24,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:27:24,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:24,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 194 proven. 15 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2020-10-14 18:27:24,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738603446] [2020-10-14 18:27:24,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:27:24,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:27:24,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481236000] [2020-10-14 18:27:24,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:27:24,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:27:24,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:27:24,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:27:24,150 INFO L87 Difference]: Start difference. First operand 136 states and 158 transitions. Second operand 8 states. [2020-10-14 18:27:24,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:27:24,325 INFO L93 Difference]: Finished difference Result 208 states and 249 transitions. [2020-10-14 18:27:24,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 18:27:24,325 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 124 [2020-10-14 18:27:24,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:27:24,327 INFO L225 Difference]: With dead ends: 208 [2020-10-14 18:27:24,327 INFO L226 Difference]: Without dead ends: 136 [2020-10-14 18:27:24,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:27:24,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-14 18:27:24,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-14 18:27:24,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-14 18:27:24,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 157 transitions. [2020-10-14 18:27:24,364 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 157 transitions. Word has length 124 [2020-10-14 18:27:24,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:27:24,364 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 157 transitions. [2020-10-14 18:27:24,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:27:24,364 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 157 transitions. [2020-10-14 18:27:24,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-14 18:27:24,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:27:24,366 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:27:24,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 18:27:24,366 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:27:24,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:27:24,367 INFO L82 PathProgramCache]: Analyzing trace with hash 17834504, now seen corresponding path program 6 times [2020-10-14 18:27:24,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:27:24,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718240249] [2020-10-14 18:27:24,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:27:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:24,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:26,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:27,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:29,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:30,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:30,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-14 18:27:30,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:27:30,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5643 [2020-10-14 18:27:30,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:30,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 18:27:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:27:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-14 18:27:30,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:30,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:27:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:30,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:30,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:30,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:27:30,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:30,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:30,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:30,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:30,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:30,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:27:30,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:30,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2020-10-14 18:27:30,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718240249] [2020-10-14 18:27:30,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:27:30,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:27:30,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937671966] [2020-10-14 18:27:30,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:27:30,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:27:30,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:27:30,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:27:30,873 INFO L87 Difference]: Start difference. First operand 136 states and 157 transitions. Second operand 12 states. [2020-10-14 18:27:31,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:27:31,297 INFO L93 Difference]: Finished difference Result 149 states and 171 transitions. [2020-10-14 18:27:31,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:27:31,298 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 124 [2020-10-14 18:27:31,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:27:31,299 INFO L225 Difference]: With dead ends: 149 [2020-10-14 18:27:31,299 INFO L226 Difference]: Without dead ends: 147 [2020-10-14 18:27:31,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:27:31,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-14 18:27:31,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2020-10-14 18:27:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-14 18:27:31,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 167 transitions. [2020-10-14 18:27:31,335 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 167 transitions. Word has length 124 [2020-10-14 18:27:31,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:27:31,335 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 167 transitions. [2020-10-14 18:27:31,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:27:31,335 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 167 transitions. [2020-10-14 18:27:31,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-14 18:27:31,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:27:31,336 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:27:31,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 18:27:31,337 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:27:31,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:27:31,337 INFO L82 PathProgramCache]: Analyzing trace with hash -492601612, now seen corresponding path program 7 times [2020-10-14 18:27:31,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:27:31,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372383395] [2020-10-14 18:27:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:27:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:31,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:31,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:33,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:36,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:36,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-14 18:27:36,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:27:36,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-14 18:27:36,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:36,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:36,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:27:36,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-14 18:27:36,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-14 18:27:36,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:36,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:27:36,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:36,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:36,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:36,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:27:36,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:36,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:36,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:36,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:36,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:36,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:27:36,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:36,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1099 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2020-10-14 18:27:36,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372383395] [2020-10-14 18:27:36,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:27:36,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 18:27:36,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015898606] [2020-10-14 18:27:36,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 18:27:36,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:27:36,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 18:27:36,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:27:36,786 INFO L87 Difference]: Start difference. First operand 145 states and 167 transitions. Second operand 25 states. [2020-10-14 18:27:37,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:27:37,477 INFO L93 Difference]: Finished difference Result 771 states and 968 transitions. [2020-10-14 18:27:37,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:27:37,478 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 127 [2020-10-14 18:27:37,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:27:37,482 INFO L225 Difference]: With dead ends: 771 [2020-10-14 18:27:37,482 INFO L226 Difference]: Without dead ends: 675 [2020-10-14 18:27:37,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:27:37,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2020-10-14 18:27:37,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 150. [2020-10-14 18:27:37,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-14 18:27:37,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 173 transitions. [2020-10-14 18:27:37,527 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 173 transitions. Word has length 127 [2020-10-14 18:27:37,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:27:37,527 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 173 transitions. [2020-10-14 18:27:37,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 18:27:37,528 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 173 transitions. [2020-10-14 18:27:37,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-14 18:27:37,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:27:37,529 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:27:37,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 18:27:37,529 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:27:37,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:27:37,530 INFO L82 PathProgramCache]: Analyzing trace with hash -699467, now seen corresponding path program 6 times [2020-10-14 18:27:37,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:27:37,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423773787] [2020-10-14 18:27:37,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:27:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:37,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:37,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:37,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:42,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:42,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-14 18:27:42,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:27:42,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-14 18:27:42,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:42,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:42,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:27:42,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:27:42,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-14 18:27:42,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:42,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:27:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:42,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:42,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:42,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:27:42,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:42,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:42,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:42,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:42,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:42,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:27:42,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:42,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:27:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 0 proven. 689 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-10-14 18:27:43,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423773787] [2020-10-14 18:27:43,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:27:43,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 18:27:43,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467279303] [2020-10-14 18:27:43,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 18:27:43,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:27:43,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 18:27:43,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:27:43,036 INFO L87 Difference]: Start difference. First operand 150 states and 173 transitions. Second operand 23 states. [2020-10-14 18:27:44,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:27:44,057 INFO L93 Difference]: Finished difference Result 230 states and 274 transitions. [2020-10-14 18:27:44,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 18:27:44,058 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 132 [2020-10-14 18:27:44,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:27:44,062 INFO L225 Difference]: With dead ends: 230 [2020-10-14 18:27:44,063 INFO L226 Difference]: Without dead ends: 202 [2020-10-14 18:27:44,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:27:44,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-14 18:27:44,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 150. [2020-10-14 18:27:44,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-14 18:27:44,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 173 transitions. [2020-10-14 18:27:44,143 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 173 transitions. Word has length 132 [2020-10-14 18:27:44,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:27:44,144 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 173 transitions. [2020-10-14 18:27:44,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 18:27:44,144 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 173 transitions. [2020-10-14 18:27:44,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-14 18:27:44,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:27:44,146 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:27:44,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 18:27:44,146 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:27:44,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:27:44,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1215454259, now seen corresponding path program 8 times [2020-10-14 18:27:44,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:27:44,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215635519] [2020-10-14 18:27:44,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:27:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:44,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:44,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:49,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:49,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-14 18:27:49,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:27:49,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5082 [2020-10-14 18:27:49,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:49,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:49,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:27:49,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-14 18:27:49,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 18:27:49,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:49,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:27:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:49,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:49,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:49,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:27:49,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:49,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:49,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:49,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:49,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:49,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:27:49,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:49,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2020-10-14 18:27:49,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215635519] [2020-10-14 18:27:49,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:27:49,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 18:27:49,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022408889] [2020-10-14 18:27:49,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 18:27:49,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:27:49,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 18:27:49,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:27:49,752 INFO L87 Difference]: Start difference. First operand 150 states and 173 transitions. Second operand 26 states. [2020-10-14 18:27:50,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:27:50,613 INFO L93 Difference]: Finished difference Result 837 states and 1054 transitions. [2020-10-14 18:27:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 18:27:50,614 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 132 [2020-10-14 18:27:50,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:27:50,619 INFO L225 Difference]: With dead ends: 837 [2020-10-14 18:27:50,619 INFO L226 Difference]: Without dead ends: 738 [2020-10-14 18:27:50,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:27:50,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2020-10-14 18:27:50,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 155. [2020-10-14 18:27:50,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-14 18:27:50,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 179 transitions. [2020-10-14 18:27:50,665 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 179 transitions. Word has length 132 [2020-10-14 18:27:50,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:27:50,665 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 179 transitions. [2020-10-14 18:27:50,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 18:27:50,665 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 179 transitions. [2020-10-14 18:27:50,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-14 18:27:50,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:27:50,666 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:27:50,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 18:27:50,666 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:27:50,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:27:50,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1757052466, now seen corresponding path program 7 times [2020-10-14 18:27:50,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:27:50,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105123228] [2020-10-14 18:27:50,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:27:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:50,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:50,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:50,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:55,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:55,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-14 18:27:55,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:27:55,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-14 18:27:55,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:55,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:55,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:27:55,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:27:55,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-14 18:27:55,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:56,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:27:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:56,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:56,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:27:56,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:27:56,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:27:56,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:27:56,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:27:56,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:27:56,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:27:56,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:27:56,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:27:56,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:27:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2020-10-14 18:27:56,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105123228] [2020-10-14 18:27:56,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:27:56,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 18:27:56,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711233525] [2020-10-14 18:27:56,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 18:27:56,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:27:56,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 18:27:56,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:27:56,096 INFO L87 Difference]: Start difference. First operand 155 states and 179 transitions. Second operand 24 states. [2020-10-14 18:27:56,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:27:56,927 INFO L93 Difference]: Finished difference Result 238 states and 284 transitions. [2020-10-14 18:27:56,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:27:56,928 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 137 [2020-10-14 18:27:56,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:27:56,929 INFO L225 Difference]: With dead ends: 238 [2020-10-14 18:27:56,929 INFO L226 Difference]: Without dead ends: 210 [2020-10-14 18:27:56,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 18:27:56,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-14 18:27:56,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 155. [2020-10-14 18:27:56,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-14 18:27:56,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 179 transitions. [2020-10-14 18:27:56,976 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 179 transitions. Word has length 137 [2020-10-14 18:27:56,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:27:56,976 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 179 transitions. [2020-10-14 18:27:56,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 18:27:56,977 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 179 transitions. [2020-10-14 18:27:56,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-14 18:27:56,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:27:56,978 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:27:56,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 18:27:56,978 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:27:56,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:27:56,978 INFO L82 PathProgramCache]: Analyzing trace with hash 629457040, now seen corresponding path program 9 times [2020-10-14 18:27:56,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:27:56,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439741150] [2020-10-14 18:27:56,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:27:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:27:57,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:27:57,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:02,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:02,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-14 18:28:02,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:28:02,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-14 18:28:02,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:02,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:02,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 18:28:02,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-14 18:28:02,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 18:28:02,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:02,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:28:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:02,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:02,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:02,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:28:02,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:02,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:02,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:02,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:02,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:02,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:28:02,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:02,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2020-10-14 18:28:02,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439741150] [2020-10-14 18:28:02,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:28:02,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 18:28:02,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124158837] [2020-10-14 18:28:02,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 18:28:02,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:28:02,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 18:28:02,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:28:02,503 INFO L87 Difference]: Start difference. First operand 155 states and 179 transitions. Second operand 27 states. [2020-10-14 18:28:03,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:28:03,365 INFO L93 Difference]: Finished difference Result 906 states and 1144 transitions. [2020-10-14 18:28:03,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 18:28:03,365 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 137 [2020-10-14 18:28:03,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:28:03,370 INFO L225 Difference]: With dead ends: 906 [2020-10-14 18:28:03,370 INFO L226 Difference]: Without dead ends: 804 [2020-10-14 18:28:03,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:28:03,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2020-10-14 18:28:03,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 160. [2020-10-14 18:28:03,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-14 18:28:03,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 185 transitions. [2020-10-14 18:28:03,434 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 185 transitions. Word has length 137 [2020-10-14 18:28:03,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:28:03,435 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 185 transitions. [2020-10-14 18:28:03,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 18:28:03,435 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 185 transitions. [2020-10-14 18:28:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-14 18:28:03,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:28:03,436 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:28:03,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 18:28:03,437 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:28:03,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:28:03,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1947234151, now seen corresponding path program 8 times [2020-10-14 18:28:03,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:28:03,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112199091] [2020-10-14 18:28:03,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:28:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:03,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:03,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:04,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:09,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:09,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-14 18:28:09,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:28:09,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6154 [2020-10-14 18:28:09,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:09,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:09,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:28:09,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:28:09,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-14 18:28:09,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:09,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:28:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:09,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:09,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:09,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:28:09,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:09,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:09,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:09,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:09,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:09,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:28:09,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:09,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:28:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1435 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-10-14 18:28:10,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112199091] [2020-10-14 18:28:10,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:28:10,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 18:28:10,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679231178] [2020-10-14 18:28:10,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 18:28:10,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:28:10,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 18:28:10,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:28:10,005 INFO L87 Difference]: Start difference. First operand 160 states and 185 transitions. Second operand 25 states. [2020-10-14 18:28:10,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:28:10,833 INFO L93 Difference]: Finished difference Result 246 states and 294 transitions. [2020-10-14 18:28:10,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:28:10,834 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 142 [2020-10-14 18:28:10,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:28:10,836 INFO L225 Difference]: With dead ends: 246 [2020-10-14 18:28:10,837 INFO L226 Difference]: Without dead ends: 218 [2020-10-14 18:28:10,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 18:28:10,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-14 18:28:10,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 160. [2020-10-14 18:28:10,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-14 18:28:10,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 185 transitions. [2020-10-14 18:28:10,898 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 185 transitions. Word has length 142 [2020-10-14 18:28:10,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:28:10,899 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 185 transitions. [2020-10-14 18:28:10,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 18:28:10,899 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 185 transitions. [2020-10-14 18:28:10,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-14 18:28:10,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:28:10,900 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:28:10,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 18:28:10,901 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:28:10,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:28:10,901 INFO L82 PathProgramCache]: Analyzing trace with hash -36191593, now seen corresponding path program 10 times [2020-10-14 18:28:10,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:28:10,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898440816] [2020-10-14 18:28:10,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:28:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:10,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:10,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:15,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:15,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-14 18:28:15,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:28:15,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-14 18:28:15,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:15,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:15,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 18:28:15,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-14 18:28:15,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 18:28:15,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:16,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:28:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:16,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:16,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:16,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:28:16,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:16,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:16,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:16,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:16,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:16,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:28:16,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:16,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1435 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2020-10-14 18:28:16,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898440816] [2020-10-14 18:28:16,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:28:16,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 18:28:16,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918548658] [2020-10-14 18:28:16,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 18:28:16,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:28:16,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 18:28:16,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:28:16,411 INFO L87 Difference]: Start difference. First operand 160 states and 185 transitions. Second operand 28 states. [2020-10-14 18:28:18,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:28:18,078 INFO L93 Difference]: Finished difference Result 978 states and 1238 transitions. [2020-10-14 18:28:18,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 18:28:18,079 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 142 [2020-10-14 18:28:18,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:28:18,084 INFO L225 Difference]: With dead ends: 978 [2020-10-14 18:28:18,084 INFO L226 Difference]: Without dead ends: 873 [2020-10-14 18:28:18,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:28:18,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2020-10-14 18:28:18,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 165. [2020-10-14 18:28:18,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-14 18:28:18,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 191 transitions. [2020-10-14 18:28:18,216 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 191 transitions. Word has length 142 [2020-10-14 18:28:18,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:28:18,216 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 191 transitions. [2020-10-14 18:28:18,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 18:28:18,217 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 191 transitions. [2020-10-14 18:28:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-14 18:28:18,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:28:18,220 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:28:18,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 18:28:18,220 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:28:18,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:28:18,221 INFO L82 PathProgramCache]: Analyzing trace with hash -73106198, now seen corresponding path program 9 times [2020-10-14 18:28:18,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:28:18,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717713935] [2020-10-14 18:28:18,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:28:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:18,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:18,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:18,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:23,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:23,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-14 18:28:23,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:28:23,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 18:28:23,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:23,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:23,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:28:23,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:28:23,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-14 18:28:23,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:23,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:28:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:23,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:23,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:23,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:28:23,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:23,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:23,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:23,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:23,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:23,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:28:23,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:23,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1557 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-10-14 18:28:23,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717713935] [2020-10-14 18:28:23,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:28:23,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 18:28:23,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820256483] [2020-10-14 18:28:23,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 18:28:23,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:28:23,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 18:28:23,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:28:23,690 INFO L87 Difference]: Start difference. First operand 165 states and 191 transitions. Second operand 26 states. [2020-10-14 18:28:24,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:28:24,556 INFO L93 Difference]: Finished difference Result 254 states and 304 transitions. [2020-10-14 18:28:24,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 18:28:24,557 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 147 [2020-10-14 18:28:24,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:28:24,559 INFO L225 Difference]: With dead ends: 254 [2020-10-14 18:28:24,559 INFO L226 Difference]: Without dead ends: 226 [2020-10-14 18:28:24,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 18:28:24,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-14 18:28:24,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 165. [2020-10-14 18:28:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-14 18:28:24,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 191 transitions. [2020-10-14 18:28:24,641 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 191 transitions. Word has length 147 [2020-10-14 18:28:24,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:28:24,642 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 191 transitions. [2020-10-14 18:28:24,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 18:28:24,642 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 191 transitions. [2020-10-14 18:28:24,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-14 18:28:24,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:28:24,643 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:28:24,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 18:28:24,644 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:28:24,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:28:24,644 INFO L82 PathProgramCache]: Analyzing trace with hash 2004230700, now seen corresponding path program 11 times [2020-10-14 18:28:24,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:28:24,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473717355] [2020-10-14 18:28:24,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:28:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:24,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:24,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:29,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:29,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-14 18:28:29,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:28:29,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-14 18:28:29,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:29,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:29,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 18:28:29,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-14 18:28:29,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-14 18:28:29,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:30,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:28:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:30,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:30,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:30,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:28:30,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:30,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:30,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:30,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:30,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:30,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:28:30,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:30,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1557 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2020-10-14 18:28:30,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473717355] [2020-10-14 18:28:30,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:28:30,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 18:28:30,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677257269] [2020-10-14 18:28:30,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 18:28:30,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:28:30,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 18:28:30,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:28:30,192 INFO L87 Difference]: Start difference. First operand 165 states and 191 transitions. Second operand 29 states. [2020-10-14 18:28:31,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:28:31,335 INFO L93 Difference]: Finished difference Result 1053 states and 1336 transitions. [2020-10-14 18:28:31,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:28:31,336 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 147 [2020-10-14 18:28:31,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:28:31,340 INFO L225 Difference]: With dead ends: 1053 [2020-10-14 18:28:31,340 INFO L226 Difference]: Without dead ends: 945 [2020-10-14 18:28:31,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:28:31,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2020-10-14 18:28:31,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 170. [2020-10-14 18:28:31,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-14 18:28:31,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 197 transitions. [2020-10-14 18:28:31,411 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 197 transitions. Word has length 147 [2020-10-14 18:28:31,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:28:31,411 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 197 transitions. [2020-10-14 18:28:31,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 18:28:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 197 transitions. [2020-10-14 18:28:31,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-14 18:28:31,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:28:31,412 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:28:31,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 18:28:31,413 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:28:31,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:28:31,413 INFO L82 PathProgramCache]: Analyzing trace with hash -225186435, now seen corresponding path program 10 times [2020-10-14 18:28:31,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:28:31,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223794333] [2020-10-14 18:28:31,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:28:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:31,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:31,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:36,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:36,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-14 18:28:36,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:28:36,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-14 18:28:36,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:36,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:36,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:28:36,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:28:36,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-14 18:28:36,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:36,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:28:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:36,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:36,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:36,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:28:36,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:36,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:36,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:36,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:36,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:36,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:28:36,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:36,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 303 proven. 26 refuted. 0 times theorem prover too weak. 1355 trivial. 0 not checked. [2020-10-14 18:28:36,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223794333] [2020-10-14 18:28:36,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:28:36,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:28:36,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505943992] [2020-10-14 18:28:36,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:28:36,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:28:36,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:28:36,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:28:36,582 INFO L87 Difference]: Start difference. First operand 170 states and 197 transitions. Second operand 9 states. [2020-10-14 18:28:36,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:28:36,777 INFO L93 Difference]: Finished difference Result 263 states and 314 transitions. [2020-10-14 18:28:36,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:28:36,778 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 152 [2020-10-14 18:28:36,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:28:36,779 INFO L225 Difference]: With dead ends: 263 [2020-10-14 18:28:36,780 INFO L226 Difference]: Without dead ends: 170 [2020-10-14 18:28:36,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:28:36,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-14 18:28:36,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2020-10-14 18:28:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-14 18:28:36,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 196 transitions. [2020-10-14 18:28:36,838 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 196 transitions. Word has length 152 [2020-10-14 18:28:36,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:28:36,838 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 196 transitions. [2020-10-14 18:28:36,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:28:36,838 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 196 transitions. [2020-10-14 18:28:36,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-14 18:28:36,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:28:36,839 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:28:36,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 18:28:36,840 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:28:36,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:28:36,840 INFO L82 PathProgramCache]: Analyzing trace with hash -465426181, now seen corresponding path program 12 times [2020-10-14 18:28:36,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:28:36,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540411764] [2020-10-14 18:28:36,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:28:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:36,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:36,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:41,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:41,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-14 18:28:41,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:28:41,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-14 18:28:41,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:41,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:41,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 18:28:41,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:28:41,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 18:28:41,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:42,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:28:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:42,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:42,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:42,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:28:42,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:42,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:42,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:42,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:42,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:42,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:28:42,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:42,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2020-10-14 18:28:42,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540411764] [2020-10-14 18:28:42,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:28:42,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 18:28:42,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288919541] [2020-10-14 18:28:42,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 18:28:42,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:28:42,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 18:28:42,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:28:42,475 INFO L87 Difference]: Start difference. First operand 170 states and 196 transitions. Second operand 30 states. [2020-10-14 18:28:43,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:28:43,676 INFO L93 Difference]: Finished difference Result 1061 states and 1344 transitions. [2020-10-14 18:28:43,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 18:28:43,676 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 152 [2020-10-14 18:28:43,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:28:43,681 INFO L225 Difference]: With dead ends: 1061 [2020-10-14 18:28:43,681 INFO L226 Difference]: Without dead ends: 950 [2020-10-14 18:28:43,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:28:43,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2020-10-14 18:28:43,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 175. [2020-10-14 18:28:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-14 18:28:43,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 202 transitions. [2020-10-14 18:28:43,756 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 202 transitions. Word has length 152 [2020-10-14 18:28:43,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:28:43,757 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 202 transitions. [2020-10-14 18:28:43,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 18:28:43,757 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 202 transitions. [2020-10-14 18:28:43,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-14 18:28:43,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:28:43,758 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:28:43,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 18:28:43,758 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:28:43,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:28:43,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1774135370, now seen corresponding path program 11 times [2020-10-14 18:28:43,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:28:43,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606838966] [2020-10-14 18:28:43,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:28:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:43,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:43,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:48,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:48,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-14 18:28:48,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:28:48,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 18:28:48,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:48,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:48,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:28:48,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:28:48,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-14 18:28:48,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:48,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:28:48,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:48,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:48,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:48,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:28:48,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:48,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:48,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:48,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:48,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:48,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:28:48,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:48,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:48,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1816 backedges. 368 proven. 40 refuted. 0 times theorem prover too weak. 1408 trivial. 0 not checked. [2020-10-14 18:28:48,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606838966] [2020-10-14 18:28:48,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:28:48,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:28:48,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556426007] [2020-10-14 18:28:48,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:28:48,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:28:48,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:28:48,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:28:48,927 INFO L87 Difference]: Start difference. First operand 175 states and 202 transitions. Second operand 10 states. [2020-10-14 18:28:49,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:28:49,138 INFO L93 Difference]: Finished difference Result 268 states and 319 transitions. [2020-10-14 18:28:49,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:28:49,138 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 157 [2020-10-14 18:28:49,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:28:49,140 INFO L225 Difference]: With dead ends: 268 [2020-10-14 18:28:49,140 INFO L226 Difference]: Without dead ends: 175 [2020-10-14 18:28:49,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:28:49,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-14 18:28:49,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2020-10-14 18:28:49,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-14 18:28:49,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 201 transitions. [2020-10-14 18:28:49,214 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 201 transitions. Word has length 157 [2020-10-14 18:28:49,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:28:49,214 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 201 transitions. [2020-10-14 18:28:49,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:28:49,214 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 201 transitions. [2020-10-14 18:28:49,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-14 18:28:49,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:28:49,215 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:28:49,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 18:28:49,215 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:28:49,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:28:49,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1533895624, now seen corresponding path program 13 times [2020-10-14 18:28:49,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:28:49,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89710167] [2020-10-14 18:28:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:28:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:49,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:53,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:54,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:54,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:54,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-14 18:28:54,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:28:54,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-14 18:28:54,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:54,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:54,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 18:28:54,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-14 18:28:54,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-14 18:28:54,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:54,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:28:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:28:54,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:28:54,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:28:54,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:28:54,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:28:54,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:28:54,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:28:54,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:28:54,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:28:54,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:28:54,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:28:54,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:28:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1816 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2020-10-14 18:28:54,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89710167] [2020-10-14 18:28:54,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:28:54,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 18:28:54,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032686552] [2020-10-14 18:28:54,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 18:28:54,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:28:54,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 18:28:54,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:28:54,898 INFO L87 Difference]: Start difference. First operand 175 states and 201 transitions. Second operand 31 states. [2020-10-14 18:28:56,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:28:56,061 INFO L93 Difference]: Finished difference Result 1069 states and 1352 transitions. [2020-10-14 18:28:56,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 18:28:56,062 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 157 [2020-10-14 18:28:56,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:28:56,066 INFO L225 Difference]: With dead ends: 1069 [2020-10-14 18:28:56,066 INFO L226 Difference]: Without dead ends: 955 [2020-10-14 18:28:56,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:28:56,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2020-10-14 18:28:56,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 180. [2020-10-14 18:28:56,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-14 18:28:56,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 207 transitions. [2020-10-14 18:28:56,144 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 207 transitions. Word has length 157 [2020-10-14 18:28:56,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:28:56,144 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 207 transitions. [2020-10-14 18:28:56,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 18:28:56,144 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 207 transitions. [2020-10-14 18:28:56,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-14 18:28:56,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:28:56,145 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:28:56,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 18:28:56,146 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:28:56,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:28:56,146 INFO L82 PathProgramCache]: Analyzing trace with hash 2102236129, now seen corresponding path program 12 times [2020-10-14 18:28:56,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:28:56,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536113275] [2020-10-14 18:28:56,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY