/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-tiling/nr5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:26:23,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:26:23,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:26:23,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:26:23,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:26:23,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:26:23,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:26:23,187 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:26:23,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:26:23,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:26:23,190 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:26:23,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:26:23,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:26:23,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:26:23,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:26:23,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:26:23,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:26:23,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:26:23,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:26:23,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:26:23,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:26:23,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:26:23,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:26:23,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:26:23,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:26:23,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:26:23,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:26:23,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:26:23,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:26:23,214 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:26:23,214 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:26:23,215 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:26:23,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:26:23,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:26:23,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:26:23,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:26:23,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:26:23,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:26:23,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:26:23,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:26:23,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:26:23,223 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 10:26:23,273 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:26:23,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:26:23,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:26:23,274 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:26:23,275 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:26:23,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:26:23,276 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:26:23,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:26:23,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:26:23,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:26:23,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:26:23,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:26:23,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:26:23,278 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:26:23,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:26:23,279 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:26:23,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:26:23,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:26:23,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:26:23,280 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:26:23,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:26:23,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:26:23,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:26:23,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:26:23,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:26:23,281 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:26:23,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:26:23,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:26:23,282 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:26:23,282 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:26:23,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:26:23,615 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:26:23,618 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:26:23,620 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:26:23,620 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:26:23,621 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/nr5.c [2020-10-12 10:26:23,684 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04253954b/bff07d84bd2f459e895539244bdba549/FLAG6f9eaa250 [2020-10-12 10:26:24,145 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:26:24,146 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/nr5.c [2020-10-12 10:26:24,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04253954b/bff07d84bd2f459e895539244bdba549/FLAG6f9eaa250 [2020-10-12 10:26:24,531 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04253954b/bff07d84bd2f459e895539244bdba549 [2020-10-12 10:26:24,539 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:26:24,541 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:26:24,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:26:24,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:26:24,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:26:24,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:26:24" (1/1) ... [2020-10-12 10:26:24,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6266eb80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:24, skipping insertion in model container [2020-10-12 10:26:24,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:26:24" (1/1) ... [2020-10-12 10:26:24,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:26:24,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:26:24,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:26:24,765 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:26:24,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:26:24,806 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:26:24,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:24 WrapperNode [2020-10-12 10:26:24,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:26:24,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:26:24,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:26:24,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:26:24,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:24" (1/1) ... [2020-10-12 10:26:24,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:24" (1/1) ... [2020-10-12 10:26:24,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:24" (1/1) ... [2020-10-12 10:26:24,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:24" (1/1) ... [2020-10-12 10:26:24,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:24" (1/1) ... [2020-10-12 10:26:24,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:24" (1/1) ... [2020-10-12 10:26:24,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:24" (1/1) ... [2020-10-12 10:26:24,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:26:24,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:26:24,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:26:24,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:26:24,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:26:24,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:26:24,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:26:24,992 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 10:26:24,993 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:26:24,993 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:26:24,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:26:24,993 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 10:26:24,994 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 10:26:24,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:26:24,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:26:24,995 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:26:24,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:26:24,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:26:24,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:26:24,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:26:24,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:26:24,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:26:25,352 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:26:25,353 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-12 10:26:25,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:26:25 BoogieIcfgContainer [2020-10-12 10:26:25,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:26:25,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:26:25,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:26:25,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:26:25,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:26:24" (1/3) ... [2020-10-12 10:26:25,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1f9130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:26:25, skipping insertion in model container [2020-10-12 10:26:25,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:26:24" (2/3) ... [2020-10-12 10:26:25,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1f9130 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:26:25, skipping insertion in model container [2020-10-12 10:26:25,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:26:25" (3/3) ... [2020-10-12 10:26:25,366 INFO L109 eAbstractionObserver]: Analyzing ICFG nr5.c [2020-10-12 10:26:25,377 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:26:25,385 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:26:25,397 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:26:25,417 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:26:25,417 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:26:25,418 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:26:25,418 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:26:25,418 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:26:25,418 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:26:25,418 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:26:25,418 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:26:25,437 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-12 10:26:25,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 10:26:25,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:25,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:25,444 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:25,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:25,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1740462776, now seen corresponding path program 1 times [2020-10-12 10:26:25,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:25,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766229836] [2020-10-12 10:26:25,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:25,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:25,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:25,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:26,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:26,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 10:26:26,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:26:26,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-10-12 10:26:26,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:26,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:26:26,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 10:26:26,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:26,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:26:26,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:26,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:26,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:26,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:26,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:26,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:26:26,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:26,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:26,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:26,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:26,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:26,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:26,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:26,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:26,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:26,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:26,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:26:26,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 10:26:26,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:26,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:26,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-12 10:26:26,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:26,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:26,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766229836] [2020-10-12 10:26:26,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:26:26,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 10:26:26,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011638303] [2020-10-12 10:26:26,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:26:26,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:26,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:26:26,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:26:26,167 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 6 states. [2020-10-12 10:26:26,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:26,383 INFO L93 Difference]: Finished difference Result 69 states and 91 transitions. [2020-10-12 10:26:26,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 10:26:26,385 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-12 10:26:26,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:26,395 INFO L225 Difference]: With dead ends: 69 [2020-10-12 10:26:26,395 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 10:26:26,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:26:26,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 10:26:26,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-12 10:26:26,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 10:26:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-12 10:26:26,447 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2020-10-12 10:26:26,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:26,447 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-12 10:26:26,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:26:26,448 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-12 10:26:26,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 10:26:26,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:26,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:26,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:26:26,450 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:26,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:26,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1384584959, now seen corresponding path program 1 times [2020-10-12 10:26:26,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:26,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014525363] [2020-10-12 10:26:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:26,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:26,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:26,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:26,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:27,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:27,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 10:26:27,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:26:27,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 758 [2020-10-12 10:26:27,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:27,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:26:27,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 10:26:27,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 10:26:27,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:27,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:27,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:27,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:27,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:27,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:27,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:26:27,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:27,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:27,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:27,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:27,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:27,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:27,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:27,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:27,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:27,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:27,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:27,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 10:26:27,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:27,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:26:27,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:27,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:26:27,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:27,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014525363] [2020-10-12 10:26:27,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:26:27,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 10:26:27,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674499794] [2020-10-12 10:26:27,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:26:27,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:27,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:26:27,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:26:27,386 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2020-10-12 10:26:27,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:27,747 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-10-12 10:26:27,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 10:26:27,748 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-12 10:26:27,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:27,752 INFO L225 Difference]: With dead ends: 65 [2020-10-12 10:26:27,753 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 10:26:27,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:26:27,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 10:26:27,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2020-10-12 10:26:27,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 10:26:27,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-12 10:26:27,769 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 22 [2020-10-12 10:26:27,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:27,769 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-12 10:26:27,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:26:27,770 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-12 10:26:27,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 10:26:27,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:27,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:27,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:26:27,771 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:27,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:27,772 INFO L82 PathProgramCache]: Analyzing trace with hash -112997622, now seen corresponding path program 1 times [2020-10-12 10:26:27,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:27,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81845834] [2020-10-12 10:26:27,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:27,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:27,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:27,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 10:26:27,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:27,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-12 10:26:27,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:27,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:27,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 10:26:27,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 10:26:27,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:27,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:27,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:27,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:27,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:27,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:27,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:27,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:27,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:27,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:27,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:27,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:27,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:27,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:27,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:27,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:27,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:27,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:27,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:27,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:27,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:27,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:27,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:27,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81845834] [2020-10-12 10:26:27,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:26:27,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 10:26:27,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757232912] [2020-10-12 10:26:27,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 10:26:27,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:27,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 10:26:27,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:26:27,871 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 4 states. [2020-10-12 10:26:27,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:27,943 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-10-12 10:26:27,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 10:26:27,943 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-12 10:26:27,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:27,945 INFO L225 Difference]: With dead ends: 62 [2020-10-12 10:26:27,945 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 10:26:27,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:26:27,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 10:26:27,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-12 10:26:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 10:26:27,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-12 10:26:27,954 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 25 [2020-10-12 10:26:27,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:27,955 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-12 10:26:27,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 10:26:27,955 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-12 10:26:27,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 10:26:27,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:27,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:27,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:26:27,957 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:27,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:27,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1279331720, now seen corresponding path program 1 times [2020-10-12 10:26:27,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:27,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169388491] [2020-10-12 10:26:27,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:27,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:27,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:28,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:28,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:28,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 10:26:28,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:26:28,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-12 10:26:28,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:28,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:26:28,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:28,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 10:26:28,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:28,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:28,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:28,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:28,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:28,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:28,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:28,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:28,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:28,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:28,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:28,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:28,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:28,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:28,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:28,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:28,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:28,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:28,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:28,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:28,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:28,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:28,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:28,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169388491] [2020-10-12 10:26:28,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:28,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:26:28,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009844900] [2020-10-12 10:26:28,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:26:28,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:28,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:26:28,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:26:28,541 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2020-10-12 10:26:28,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:28,904 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2020-10-12 10:26:28,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 10:26:28,905 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-12 10:26:28,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:28,907 INFO L225 Difference]: With dead ends: 86 [2020-10-12 10:26:28,907 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 10:26:28,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:26:28,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 10:26:28,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 47. [2020-10-12 10:26:28,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 10:26:28,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-12 10:26:28,920 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 28 [2020-10-12 10:26:28,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:28,921 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-12 10:26:28,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:26:28,921 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-12 10:26:28,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 10:26:28,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:28,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:28,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:26:28,923 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:28,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:28,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1021166282, now seen corresponding path program 1 times [2020-10-12 10:26:28,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:28,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796095291] [2020-10-12 10:26:28,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:28,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:28,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:29,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:29,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:29,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 10:26:29,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:26:29,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-12 10:26:29,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:29,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:26:29,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:29,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 10:26:29,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:29,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:29,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:29,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:29,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:29,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:29,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:29,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:29,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:29,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:29,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:29,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:29,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:29,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:29,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:29,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:29,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:29,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:29,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:29,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:29,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:29,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:29,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:29,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796095291] [2020-10-12 10:26:29,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:29,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:26:29,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806449796] [2020-10-12 10:26:29,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:26:29,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:29,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:26:29,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:26:29,374 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 10 states. [2020-10-12 10:26:29,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:29,810 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2020-10-12 10:26:29,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:26:29,811 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-12 10:26:29,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:29,813 INFO L225 Difference]: With dead ends: 90 [2020-10-12 10:26:29,813 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 10:26:29,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:26:29,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 10:26:29,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2020-10-12 10:26:29,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 10:26:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2020-10-12 10:26:29,827 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 28 [2020-10-12 10:26:29,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:29,827 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2020-10-12 10:26:29,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:26:29,827 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2020-10-12 10:26:29,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 10:26:29,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:29,828 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:29,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:26:29,829 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:29,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:29,829 INFO L82 PathProgramCache]: Analyzing trace with hash -994855160, now seen corresponding path program 1 times [2020-10-12 10:26:29,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:29,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368318874] [2020-10-12 10:26:29,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:29,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:29,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:29,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:30,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:30,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 10:26:30,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:26:30,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 637 [2020-10-12 10:26:30,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:30,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:26:30,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:30,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 10:26:30,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:30,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:30,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:30,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:30,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:30,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:30,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:30,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:30,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:30,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:30,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:30,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:30,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:30,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:30,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:30,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:30,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:30,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:30,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:30,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:30,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:30,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:30,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:30,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368318874] [2020-10-12 10:26:30,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:30,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:26:30,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270657315] [2020-10-12 10:26:30,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:26:30,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:30,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:26:30,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:26:30,611 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 9 states. [2020-10-12 10:26:30,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:30,957 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2020-10-12 10:26:30,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:26:30,958 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-12 10:26:30,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:30,959 INFO L225 Difference]: With dead ends: 120 [2020-10-12 10:26:30,959 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 10:26:30,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:26:30,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 10:26:30,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 58. [2020-10-12 10:26:30,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 10:26:30,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2020-10-12 10:26:30,972 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 31 [2020-10-12 10:26:30,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:30,972 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2020-10-12 10:26:30,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:26:30,972 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2020-10-12 10:26:30,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 10:26:30,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:30,974 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:30,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:26:30,974 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:30,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:30,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1762083020, now seen corresponding path program 2 times [2020-10-12 10:26:30,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:30,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646856804] [2020-10-12 10:26:30,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:30,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:31,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:31,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:31,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:31,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:31,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:31,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:31,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:31,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:31,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 10:26:31,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:26:31,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 886 [2020-10-12 10:26:31,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:31,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 10:26:31,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:31,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 10:26:31,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:31,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:31,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:31,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:31,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:31,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:31,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:31,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:31,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:31,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:31,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:31,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:31,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:32,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:32,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:32,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:32,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:32,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:32,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:32,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:32,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:32,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:32,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:32,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646856804] [2020-10-12 10:26:32,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:32,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 10:26:32,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787416289] [2020-10-12 10:26:32,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 10:26:32,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:32,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 10:26:32,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:26:32,011 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand 11 states. [2020-10-12 10:26:32,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:32,488 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2020-10-12 10:26:32,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:26:32,489 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-12 10:26:32,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:32,491 INFO L225 Difference]: With dead ends: 99 [2020-10-12 10:26:32,491 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 10:26:32,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:26:32,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 10:26:32,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 61. [2020-10-12 10:26:32,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 10:26:32,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-10-12 10:26:32,504 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 31 [2020-10-12 10:26:32,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:32,505 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-10-12 10:26:32,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 10:26:32,505 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-10-12 10:26:32,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 10:26:32,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:32,506 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:32,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:26:32,507 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:32,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:32,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1906551953, now seen corresponding path program 3 times [2020-10-12 10:26:32,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:32,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709431207] [2020-10-12 10:26:32,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:32,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:32,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:32,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:32,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:32,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:32,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:32,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:33,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:34,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:34,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 10:26:34,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:26:34,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1551 [2020-10-12 10:26:34,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:34,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:26:34,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:34,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:26:34,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:34,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:34,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:34,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:34,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:34,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:34,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:34,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:34,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:34,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:34,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:34,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:34,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:34,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:34,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:34,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:34,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:34,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:34,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:34,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:34,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:34,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:34,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:26:34,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709431207] [2020-10-12 10:26:34,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:34,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:26:34,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527968103] [2020-10-12 10:26:34,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:26:34,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:34,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:26:34,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:26:34,282 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 12 states. [2020-10-12 10:26:35,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:35,140 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2020-10-12 10:26:35,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:26:35,141 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-12 10:26:35,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:35,144 INFO L225 Difference]: With dead ends: 104 [2020-10-12 10:26:35,144 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 10:26:35,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:26:35,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 10:26:35,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 51. [2020-10-12 10:26:35,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 10:26:35,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-10-12 10:26:35,163 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 34 [2020-10-12 10:26:35,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:35,165 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-10-12 10:26:35,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:26:35,166 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-10-12 10:26:35,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 10:26:35,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:35,171 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:35,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:26:35,171 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:35,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:35,172 INFO L82 PathProgramCache]: Analyzing trace with hash -378315451, now seen corresponding path program 1 times [2020-10-12 10:26:35,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:35,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330368716] [2020-10-12 10:26:35,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:35,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:35,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:35,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:35,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 10:26:35,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:26:35,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-12 10:26:35,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:35,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:26:35,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:26:35,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:26:35,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:35,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:35,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:35,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:35,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:35,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:35,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:35,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:35,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:35,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:35,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:35,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:35,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:35,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:35,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:35,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:35,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:35,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:35,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:26:35,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:35,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:35,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:35,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:35,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:35,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 10:26:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:35,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:35,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:35,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:35,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:35,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:35,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:35,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:35,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:26:35,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:35,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:26:35,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330368716] [2020-10-12 10:26:35,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:35,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 10:26:35,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205899093] [2020-10-12 10:26:35,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:26:35,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:35,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:26:35,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:26:35,421 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 6 states. [2020-10-12 10:26:35,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:35,534 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2020-10-12 10:26:35,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 10:26:35,535 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-12 10:26:35,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:35,536 INFO L225 Difference]: With dead ends: 91 [2020-10-12 10:26:35,536 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 10:26:35,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:26:35,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 10:26:35,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-12 10:26:35,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 10:26:35,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-10-12 10:26:35,550 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 37 [2020-10-12 10:26:35,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:35,550 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-10-12 10:26:35,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:26:35,550 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-10-12 10:26:35,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 10:26:35,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:35,553 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:35,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:26:35,553 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:35,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:35,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1324006069, now seen corresponding path program 1 times [2020-10-12 10:26:35,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:35,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090130290] [2020-10-12 10:26:35,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:35,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:35,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:35,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:36,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:36,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 10:26:36,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:26:36,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 468 [2020-10-12 10:26:36,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:36,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:26:36,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:36,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:26:36,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:36,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:36,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:36,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:36,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:36,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:36,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:36,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:36,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:36,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:36,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:36,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:36,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:36,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:36,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:36,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:36,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:36,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:36,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:36,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:36,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:36,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:36,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:36,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:26:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:36,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:36,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:36,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:36,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:36,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:36,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:36,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:36,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:36,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:36,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:36,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090130290] [2020-10-12 10:26:36,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:36,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:26:36,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838976278] [2020-10-12 10:26:36,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:26:36,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:36,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:26:36,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:26:36,219 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 12 states. [2020-10-12 10:26:36,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:36,797 INFO L93 Difference]: Finished difference Result 141 states and 178 transitions. [2020-10-12 10:26:36,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:26:36,798 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-12 10:26:36,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:36,800 INFO L225 Difference]: With dead ends: 141 [2020-10-12 10:26:36,800 INFO L226 Difference]: Without dead ends: 139 [2020-10-12 10:26:36,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:26:36,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-12 10:26:36,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 91. [2020-10-12 10:26:36,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 10:26:36,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2020-10-12 10:26:36,821 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 40 [2020-10-12 10:26:36,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:36,822 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2020-10-12 10:26:36,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:26:36,822 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2020-10-12 10:26:36,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 10:26:36,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:36,827 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:36,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:26:36,827 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:36,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:36,828 INFO L82 PathProgramCache]: Analyzing trace with hash 344590727, now seen corresponding path program 2 times [2020-10-12 10:26:36,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:36,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541670277] [2020-10-12 10:26:36,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:36,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:36,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:36,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:37,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:37,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 10:26:37,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:26:37,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 753 [2020-10-12 10:26:37,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:37,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 10:26:37,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:37,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:26:37,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:37,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:37,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:37,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:37,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:37,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:37,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:37,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:37,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:37,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:37,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:37,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:37,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:37,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:37,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:37,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:37,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:37,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:37,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:37,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:37,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:37,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:37,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:37,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 10:26:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:37,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:37,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:37,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:37,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:37,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:37,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:37,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:37,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:37,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:37,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:26:37,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541670277] [2020-10-12 10:26:37,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:37,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 10:26:37,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101387961] [2020-10-12 10:26:37,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 10:26:37,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:37,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 10:26:37,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:26:37,754 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand 11 states. [2020-10-12 10:26:38,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:38,275 INFO L93 Difference]: Finished difference Result 194 states and 249 transitions. [2020-10-12 10:26:38,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:26:38,276 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-12 10:26:38,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:38,278 INFO L225 Difference]: With dead ends: 194 [2020-10-12 10:26:38,278 INFO L226 Difference]: Without dead ends: 178 [2020-10-12 10:26:38,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:26:38,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-12 10:26:38,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 124. [2020-10-12 10:26:38,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-12 10:26:38,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2020-10-12 10:26:38,299 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 43 [2020-10-12 10:26:38,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:38,299 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2020-10-12 10:26:38,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 10:26:38,299 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2020-10-12 10:26:38,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 10:26:38,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:38,300 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:38,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:26:38,301 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:38,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:38,301 INFO L82 PathProgramCache]: Analyzing trace with hash 218206967, now seen corresponding path program 3 times [2020-10-12 10:26:38,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:38,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442260645] [2020-10-12 10:26:38,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:38,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:38,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:38,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:38,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:38,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:38,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:38,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:39,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:40,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:40,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 10:26:40,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:26:40,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1701 [2020-10-12 10:26:40,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:40,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:26:40,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:40,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 10:26:40,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:40,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:40,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:40,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:40,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:40,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:40,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:40,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:40,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:40,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:40,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:40,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:40,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:40,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:40,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:40,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:40,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:40,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:40,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:40,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:40,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:40,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:40,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:40,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 10:26:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:40,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:40,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:40,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:40,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:40,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:40,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:40,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:40,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:40,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:40,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:26:40,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442260645] [2020-10-12 10:26:40,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:40,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:26:40,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073845329] [2020-10-12 10:26:40,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:26:40,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:40,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:26:40,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:26:40,192 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand 13 states. [2020-10-12 10:26:40,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:40,767 INFO L93 Difference]: Finished difference Result 218 states and 282 transitions. [2020-10-12 10:26:40,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:26:40,768 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-10-12 10:26:40,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:40,770 INFO L225 Difference]: With dead ends: 218 [2020-10-12 10:26:40,770 INFO L226 Difference]: Without dead ends: 216 [2020-10-12 10:26:40,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:26:40,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-12 10:26:40,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 134. [2020-10-12 10:26:40,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-12 10:26:40,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 172 transitions. [2020-10-12 10:26:40,798 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 172 transitions. Word has length 46 [2020-10-12 10:26:40,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:40,799 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 172 transitions. [2020-10-12 10:26:40,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:26:40,799 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 172 transitions. [2020-10-12 10:26:40,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 10:26:40,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:40,800 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:40,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:26:40,801 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:40,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:40,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1149798824, now seen corresponding path program 4 times [2020-10-12 10:26:40,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:40,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566436641] [2020-10-12 10:26:40,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:40,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:40,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:40,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:40,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:41,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:41,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 10:26:41,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:26:41,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 866 [2020-10-12 10:26:41,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:41,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:26:41,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:41,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:26:41,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:41,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:41,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:41,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:41,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:41,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:41,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:41,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:41,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:41,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:41,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:41,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:41,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:41,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:41,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:41,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:41,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:41,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:41,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:41,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:41,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:41,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:41,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:41,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:26:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:41,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:41,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:41,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:41,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:41,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:41,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:41,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:41,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:41,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:41,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:41,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:26:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:41,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:41,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:41,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:41,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:41,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:26:41,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:41,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:26:41,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:26:41,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:41,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:26:41,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566436641] [2020-10-12 10:26:41,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:41,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:26:41,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763366685] [2020-10-12 10:26:41,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:26:41,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:41,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:26:41,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:26:41,858 INFO L87 Difference]: Start difference. First operand 134 states and 172 transitions. Second operand 12 states. [2020-10-12 10:26:42,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:42,378 INFO L93 Difference]: Finished difference Result 176 states and 222 transitions. [2020-10-12 10:26:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:26:42,378 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-12 10:26:42,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:42,380 INFO L225 Difference]: With dead ends: 176 [2020-10-12 10:26:42,380 INFO L226 Difference]: Without dead ends: 160 [2020-10-12 10:26:42,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:26:42,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-12 10:26:42,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 134. [2020-10-12 10:26:42,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-12 10:26:42,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 171 transitions. [2020-10-12 10:26:42,408 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 171 transitions. Word has length 49 [2020-10-12 10:26:42,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:42,409 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 171 transitions. [2020-10-12 10:26:42,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:26:42,409 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 171 transitions. [2020-10-12 10:26:42,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 10:26:42,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:42,410 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:42,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:26:42,411 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:42,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:42,411 INFO L82 PathProgramCache]: Analyzing trace with hash 138681574, now seen corresponding path program 5 times [2020-10-12 10:26:42,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:42,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171757986] [2020-10-12 10:26:42,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:42,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:42,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:42,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:42,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 10:26:42,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:26:42,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-12 10:26:42,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:42,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:26:42,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 10:26:42,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 10:26:42,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:42,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:42,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:42,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:42,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:42,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:42,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:42,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:42,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:42,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:42,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:42,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:42,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:42,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:42,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:42,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:42,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:42,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:42,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:42,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:42,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:42,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:42,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:42,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 10:26:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:42,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:42,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:42,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:42,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:42,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:42,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:42,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:42,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:26:42,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:42,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:42,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:26:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:42,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:42,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:42,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:42,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:42,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:42,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:42,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:42,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:26:42,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:42,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 10:26:42,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171757986] [2020-10-12 10:26:42,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:42,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 10:26:42,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122989667] [2020-10-12 10:26:42,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:26:42,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:42,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:26:42,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:26:42,720 INFO L87 Difference]: Start difference. First operand 134 states and 171 transitions. Second operand 6 states. [2020-10-12 10:26:42,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:42,835 INFO L93 Difference]: Finished difference Result 295 states and 384 transitions. [2020-10-12 10:26:42,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 10:26:42,835 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-10-12 10:26:42,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:42,837 INFO L225 Difference]: With dead ends: 295 [2020-10-12 10:26:42,837 INFO L226 Difference]: Without dead ends: 194 [2020-10-12 10:26:42,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:26:42,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-12 10:26:42,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 152. [2020-10-12 10:26:42,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-12 10:26:42,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 195 transitions. [2020-10-12 10:26:42,862 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 195 transitions. Word has length 49 [2020-10-12 10:26:42,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:42,862 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 195 transitions. [2020-10-12 10:26:42,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:26:42,862 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 195 transitions. [2020-10-12 10:26:42,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 10:26:42,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:42,863 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:42,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:26:42,863 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:42,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:42,864 INFO L82 PathProgramCache]: Analyzing trace with hash 645908246, now seen corresponding path program 6 times [2020-10-12 10:26:42,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:42,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060721089] [2020-10-12 10:26:42,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:42,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:42,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:43,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:43,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:43,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:43,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:43,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 10:26:43,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:26:43,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1055 [2020-10-12 10:26:43,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:43,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:26:43,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:43,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 10:26:43,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:44,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:44,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:44,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:44,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:44,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:44,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:44,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:44,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:44,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:44,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:44,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:44,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:44,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:44,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:44,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:44,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:44,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:44,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:44,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:44,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:44,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:44,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:44,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 10:26:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:44,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:44,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:44,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:44,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:44,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:44,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:44,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:44,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:44,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:44,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:44,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:26:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:44,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:44,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:44,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:44,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:44,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:44,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:44,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:44,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:44,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:44,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 10:26:44,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060721089] [2020-10-12 10:26:44,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:44,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:26:44,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785112073] [2020-10-12 10:26:44,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:26:44,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:44,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:26:44,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:26:44,228 INFO L87 Difference]: Start difference. First operand 152 states and 195 transitions. Second operand 15 states. [2020-10-12 10:26:45,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:45,471 INFO L93 Difference]: Finished difference Result 287 states and 371 transitions. [2020-10-12 10:26:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 10:26:45,472 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2020-10-12 10:26:45,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:45,474 INFO L225 Difference]: With dead ends: 287 [2020-10-12 10:26:45,474 INFO L226 Difference]: Without dead ends: 271 [2020-10-12 10:26:45,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:26:45,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-12 10:26:45,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 219. [2020-10-12 10:26:45,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-12 10:26:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 287 transitions. [2020-10-12 10:26:45,505 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 287 transitions. Word has length 52 [2020-10-12 10:26:45,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:45,505 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 287 transitions. [2020-10-12 10:26:45,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:26:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 287 transitions. [2020-10-12 10:26:45,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 10:26:45,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:45,507 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:45,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:26:45,507 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:45,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:45,507 INFO L82 PathProgramCache]: Analyzing trace with hash -437595562, now seen corresponding path program 7 times [2020-10-12 10:26:45,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:45,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860041976] [2020-10-12 10:26:45,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:45,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:45,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:45,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:45,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:45,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:46,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:46,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:46,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 10:26:46,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:26:46,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1417 [2020-10-12 10:26:46,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:46,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:26:46,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:46,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 10:26:46,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:47,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:47,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:47,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:47,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:47,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:47,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:47,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:47,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:47,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:47,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:47,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:47,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:47,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:47,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:47,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:47,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:47,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:47,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:47,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:47,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:47,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:47,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:47,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 10:26:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:47,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:47,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:47,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:47,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:47,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:47,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:47,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:47,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:47,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:47,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:47,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:26:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:47,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:47,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:47,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:47,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:47,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:26:47,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:47,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:47,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:47,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:47,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:47,277 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 10:26:47,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860041976] [2020-10-12 10:26:47,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:47,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:26:47,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873227395] [2020-10-12 10:26:47,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:26:47,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:47,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:26:47,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:26:47,291 INFO L87 Difference]: Start difference. First operand 219 states and 287 transitions. Second operand 14 states. [2020-10-12 10:26:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:49,699 INFO L93 Difference]: Finished difference Result 532 states and 703 transitions. [2020-10-12 10:26:49,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 10:26:49,700 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-10-12 10:26:49,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:49,704 INFO L225 Difference]: With dead ends: 532 [2020-10-12 10:26:49,704 INFO L226 Difference]: Without dead ends: 516 [2020-10-12 10:26:49,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=390, Invalid=2366, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 10:26:49,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2020-10-12 10:26:49,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 299. [2020-10-12 10:26:49,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-12 10:26:49,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 403 transitions. [2020-10-12 10:26:49,757 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 403 transitions. Word has length 52 [2020-10-12 10:26:49,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:49,757 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 403 transitions. [2020-10-12 10:26:49,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:26:49,757 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 403 transitions. [2020-10-12 10:26:49,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 10:26:49,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:49,759 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:49,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:26:49,759 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:49,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:49,759 INFO L82 PathProgramCache]: Analyzing trace with hash 251541460, now seen corresponding path program 8 times [2020-10-12 10:26:49,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:49,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336241174] [2020-10-12 10:26:49,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:49,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:49,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:49,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:49,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:49,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:50,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:50,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:50,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:50,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:51,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:52,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:52,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 10:26:52,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:26:52,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2438 [2020-10-12 10:26:52,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:52,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:26:52,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:52,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 10:26:52,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:26:52,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:52,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:52,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:52,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:52,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:52,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:52,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:52,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:52,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:52,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:52,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:52,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:52,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:52,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:52,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:52,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:52,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:52,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:52,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:52,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:52,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:52,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:52,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:52,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 10:26:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:52,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:52,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:52,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:52,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:52,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:52,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:52,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:52,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:52,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:52,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:52,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:26:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:52,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:52,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:52,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:52,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:52,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:26:52,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:52,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:52,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:52,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:52,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 10:26:52,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336241174] [2020-10-12 10:26:52,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:52,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:26:52,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260465495] [2020-10-12 10:26:52,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:26:52,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:52,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:26:52,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:26:52,426 INFO L87 Difference]: Start difference. First operand 299 states and 403 transitions. Second operand 14 states. [2020-10-12 10:26:53,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:53,433 INFO L93 Difference]: Finished difference Result 576 states and 781 transitions. [2020-10-12 10:26:53,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 10:26:53,434 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-10-12 10:26:53,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:53,438 INFO L225 Difference]: With dead ends: 576 [2020-10-12 10:26:53,438 INFO L226 Difference]: Without dead ends: 574 [2020-10-12 10:26:53,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:26:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2020-10-12 10:26:53,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 435. [2020-10-12 10:26:53,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-10-12 10:26:53,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 597 transitions. [2020-10-12 10:26:53,514 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 597 transitions. Word has length 52 [2020-10-12 10:26:53,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:53,515 INFO L479 AbstractCegarLoop]: Abstraction has 435 states and 597 transitions. [2020-10-12 10:26:53,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:26:53,515 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 597 transitions. [2020-10-12 10:26:53,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 10:26:53,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:53,517 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:53,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:26:53,517 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:53,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:53,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1253085468, now seen corresponding path program 9 times [2020-10-12 10:26:53,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:53,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585722929] [2020-10-12 10:26:53,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:53,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:53,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:53,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:53,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:53,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:53,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:53,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:54,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:55,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:55,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 10:26:55,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:26:55,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1633 [2020-10-12 10:26:55,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:55,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 10:26:55,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:26:55,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 10:26:55,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:55,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:26:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:55,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:55,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:55,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:26:55,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:55,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:55,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:55,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:55,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:55,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:55,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:55,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:26:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:55,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:55,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:55,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:55,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:55,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:26:55,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:55,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:26:55,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:55,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:26:55,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:55,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 10:26:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:55,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:55,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:55,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:55,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:55,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:55,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:55,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:55,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:55,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:55,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:55,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 10:26:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:55,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:55,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:26:55,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:26:55,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:26:55,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:26:55,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:26:55,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:26:55,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:26:55,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:26:55,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:26:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 10:26:55,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585722929] [2020-10-12 10:26:55,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:26:55,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:26:55,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789368799] [2020-10-12 10:26:55,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:26:55,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:26:55,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:26:55,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:26:55,367 INFO L87 Difference]: Start difference. First operand 435 states and 597 transitions. Second operand 13 states. [2020-10-12 10:26:56,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:26:56,691 INFO L93 Difference]: Finished difference Result 864 states and 1177 transitions. [2020-10-12 10:26:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:26:56,691 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-10-12 10:26:56,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:26:56,697 INFO L225 Difference]: With dead ends: 864 [2020-10-12 10:26:56,697 INFO L226 Difference]: Without dead ends: 848 [2020-10-12 10:26:56,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:26:56,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2020-10-12 10:26:56,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 518. [2020-10-12 10:26:56,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2020-10-12 10:26:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 715 transitions. [2020-10-12 10:26:56,791 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 715 transitions. Word has length 55 [2020-10-12 10:26:56,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:26:56,791 INFO L479 AbstractCegarLoop]: Abstraction has 518 states and 715 transitions. [2020-10-12 10:26:56,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:26:56,791 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 715 transitions. [2020-10-12 10:26:56,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 10:26:56,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:26:56,793 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:26:56,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:26:56,794 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:26:56,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:26:56,794 INFO L82 PathProgramCache]: Analyzing trace with hash 273223086, now seen corresponding path program 10 times [2020-10-12 10:26:56,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:26:56,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658116828] [2020-10-12 10:26:56,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:26:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:26:56,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:56,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:56,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:56,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:56,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:57,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:57,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:57,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:57,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:57,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:58,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:58,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:58,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:26:59,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:00,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:01,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:01,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:01,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 10:27:01,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 10:27:01,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:27:01,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:01,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:27:01,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:27:01,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 10:27:01,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:02,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:02,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:02,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:02,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:02,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:02,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:02,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:02,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:02,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:02,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:02,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:02,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:02,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:02,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:02,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:02,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:02,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:27:02,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:02,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:02,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:02,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:02,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:02,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 10:27:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:02,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:02,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:02,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:02,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:02,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:02,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:02,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:02,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:02,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:02,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 7 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:27:02,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658116828] [2020-10-12 10:27:02,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:02,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:27:02,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931923577] [2020-10-12 10:27:02,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:27:02,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:02,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:27:02,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:27:02,235 INFO L87 Difference]: Start difference. First operand 518 states and 715 transitions. Second operand 17 states. [2020-10-12 10:27:03,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:27:03,284 INFO L93 Difference]: Finished difference Result 827 states and 1125 transitions. [2020-10-12 10:27:03,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:27:03,285 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 55 [2020-10-12 10:27:03,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:27:03,290 INFO L225 Difference]: With dead ends: 827 [2020-10-12 10:27:03,290 INFO L226 Difference]: Without dead ends: 825 [2020-10-12 10:27:03,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:27:03,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2020-10-12 10:27:03,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 700. [2020-10-12 10:27:03,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2020-10-12 10:27:03,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 968 transitions. [2020-10-12 10:27:03,393 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 968 transitions. Word has length 55 [2020-10-12 10:27:03,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:27:03,394 INFO L479 AbstractCegarLoop]: Abstraction has 700 states and 968 transitions. [2020-10-12 10:27:03,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:27:03,394 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 968 transitions. [2020-10-12 10:27:03,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 10:27:03,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:27:03,400 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:27:03,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:27:03,400 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:27:03,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:27:03,401 INFO L82 PathProgramCache]: Analyzing trace with hash -2098516176, now seen corresponding path program 11 times [2020-10-12 10:27:03,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:27:03,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636427611] [2020-10-12 10:27:03,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:27:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:03,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:03,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:03,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:03,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:03,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:03,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:03,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:03,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:03,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:03,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:04,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:04,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:04,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:04,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:05,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:05,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:06,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:06,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:06,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:08,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:08,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 10:27:08,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-12 10:27:08,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:27:08,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:08,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 10:27:08,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 10:27:08,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 10:27:08,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:08,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:08,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:08,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:08,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:08,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:08,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:08,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:08,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:08,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:08,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:08,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:08,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:08,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:08,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:08,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:08,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:08,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:08,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:08,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:08,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:08,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:08,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:08,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 10:27:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:08,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:08,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:08,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:08,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:08,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:08,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:08,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:08,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:27:08,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:08,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:27:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 50 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 10:27:08,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636427611] [2020-10-12 10:27:08,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:08,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:27:08,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034680675] [2020-10-12 10:27:08,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:27:08,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:08,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:27:08,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:27:08,498 INFO L87 Difference]: Start difference. First operand 700 states and 968 transitions. Second operand 10 states. [2020-10-12 10:27:08,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:27:08,756 INFO L93 Difference]: Finished difference Result 768 states and 1053 transitions. [2020-10-12 10:27:08,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 10:27:08,757 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-12 10:27:08,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:27:08,758 INFO L225 Difference]: With dead ends: 768 [2020-10-12 10:27:08,758 INFO L226 Difference]: Without dead ends: 91 [2020-10-12 10:27:08,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:27:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-12 10:27:08,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 59. [2020-10-12 10:27:08,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 10:27:08,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-10-12 10:27:08,780 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 55 [2020-10-12 10:27:08,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:27:08,781 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-10-12 10:27:08,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:27:08,781 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-10-12 10:27:08,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 10:27:08,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:27:08,782 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:27:08,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:27:08,783 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:27:08,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:27:08,783 INFO L82 PathProgramCache]: Analyzing trace with hash -2113576235, now seen corresponding path program 12 times [2020-10-12 10:27:08,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:27:08,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41222687] [2020-10-12 10:27:08,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:27:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:08,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:08,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:09,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:09,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:09,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:09,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:09,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:09,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:09,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:09,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:10,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:10,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:10,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:10,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:10,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:12,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:12,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:13,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:13,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 10:27:13,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-12 10:27:13,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4365 [2020-10-12 10:27:13,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:13,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 10:27:13,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:27:13,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 10:27:13,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:14,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:14,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:14,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:14,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:14,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:14,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:14,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:14,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:14,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:14,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:14,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:14,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:14,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:14,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:14,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:14,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:14,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:14,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:14,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:14,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:14,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:14,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:14,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 10:27:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:14,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:14,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:14,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:14,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:14,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:27:14,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:14,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:14,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:14,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:14,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:14,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 10:27:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:14,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:14,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:14,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:14,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:14,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:27:14,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:14,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:27:14,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:14,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:27:14,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:14,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-12 10:27:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:14,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:14,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:14,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:14,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:14,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:27:14,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:14,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:27:14,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:14,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:27:14,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 10:27:14,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41222687] [2020-10-12 10:27:14,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:14,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 10:27:14,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706961820] [2020-10-12 10:27:14,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 10:27:14,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:14,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 10:27:14,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:27:14,580 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 26 states. [2020-10-12 10:27:15,014 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2020-10-12 10:27:15,259 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 39 [2020-10-12 10:27:15,573 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2020-10-12 10:27:15,877 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2020-10-12 10:27:16,362 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2020-10-12 10:27:17,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:27:17,809 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2020-10-12 10:27:17,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:27:17,809 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 64 [2020-10-12 10:27:17,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:27:17,811 INFO L225 Difference]: With dead ends: 118 [2020-10-12 10:27:17,811 INFO L226 Difference]: Without dead ends: 116 [2020-10-12 10:27:17,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=272, Invalid=2380, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 10:27:17,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-12 10:27:17,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 102. [2020-10-12 10:27:17,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-12 10:27:17,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2020-10-12 10:27:17,831 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 64 [2020-10-12 10:27:17,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:27:17,831 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2020-10-12 10:27:17,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 10:27:17,832 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2020-10-12 10:27:17,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 10:27:17,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:27:17,833 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:27:17,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:27:17,833 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:27:17,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:27:17,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1639145111, now seen corresponding path program 13 times [2020-10-12 10:27:17,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:27:17,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749535860] [2020-10-12 10:27:17,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:27:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:17,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:17,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:17,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:17,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:17,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:18,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:18,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:18,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:18,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:18,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:18,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:18,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:19,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:19,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:19,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:19,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:19,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:19,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:20,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:21,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:21,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:21,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:21,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:22,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:22,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:22,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:22,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:22,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:22,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:22,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 10:27:22,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-12 10:27:22,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 10:27:22,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:22,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 10:27:22,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:27:22,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 10:27:22,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:23,537 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-10-12 10:27:23,936 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-12 10:27:24,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:24,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:24,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:24,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:24,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:24,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:24,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:24,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:24,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:24,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:24,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:24,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:24,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:24,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:24,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:24,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:24,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:24,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:24,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:24,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:24,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:24,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:24,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 10:27:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:24,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:24,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:24,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:24,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:24,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:27:24,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:24,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:24,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:24,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:24,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:24,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 10:27:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:24,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:24,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:24,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:24,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:24,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:27:24,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:24,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:27:24,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:24,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:27:24,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:24,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 10:27:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:24,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:24,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:24,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:24,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:24,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:27:24,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:24,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:27:24,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:24,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:27:24,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 15 proven. 73 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:27:24,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749535860] [2020-10-12 10:27:24,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:24,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 10:27:24,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587766336] [2020-10-12 10:27:24,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 10:27:24,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:24,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 10:27:24,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:27:24,712 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand 28 states. [2020-10-12 10:27:25,708 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 44 [2020-10-12 10:27:26,178 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 39 [2020-10-12 10:27:26,664 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 44 [2020-10-12 10:27:27,215 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-12 10:27:28,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:27:28,376 INFO L93 Difference]: Finished difference Result 143 states and 172 transitions. [2020-10-12 10:27:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 10:27:28,379 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 70 [2020-10-12 10:27:28,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:27:28,380 INFO L225 Difference]: With dead ends: 143 [2020-10-12 10:27:28,381 INFO L226 Difference]: Without dead ends: 141 [2020-10-12 10:27:28,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=308, Invalid=2554, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 10:27:28,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-12 10:27:28,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 95. [2020-10-12 10:27:28,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 10:27:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2020-10-12 10:27:28,402 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 70 [2020-10-12 10:27:28,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:27:28,403 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2020-10-12 10:27:28,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 10:27:28,403 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2020-10-12 10:27:28,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 10:27:28,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:27:28,404 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:27:28,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 10:27:28,404 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:27:28,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:27:28,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1441200760, now seen corresponding path program 14 times [2020-10-12 10:27:28,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:27:28,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508685733] [2020-10-12 10:27:28,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:27:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:28,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:28,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:28,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:28,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:28,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:28,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:29,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:29,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:29,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:29,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:30,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:30,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:30,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:30,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:30,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:31,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:31,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:31,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:31,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:31,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:31,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:31,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:31,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:33,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:33,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 10:27:33,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-12 10:27:33,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:27:33,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:33,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 10:27:33,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:27:33,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 10:27:33,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:33,943 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-12 10:27:34,110 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-12 10:27:34,343 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2020-10-12 10:27:34,487 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-12 10:27:34,633 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-10-12 10:27:34,777 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-12 10:27:35,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:35,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:35,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:35,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:35,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:35,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:35,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:35,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:35,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:35,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:35,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:35,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:35,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:35,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:35,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:35,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:35,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:35,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:35,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:35,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:35,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:35,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:35,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 10:27:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:35,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:35,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:35,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:35,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:35,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:27:35,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:35,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:35,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:35,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:35,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:35,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 10:27:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:35,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:35,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:35,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:35,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:35,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:27:35,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:35,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:27:35,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:35,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:27:35,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:35,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-12 10:27:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:35,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:35,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:35,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:35,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:35,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:27:35,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:27:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:27:35,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:35,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-12 10:27:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:35,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:35,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:35,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:35,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:35,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:35,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:35,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:35,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:35,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:35,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 73 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-12 10:27:35,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508685733] [2020-10-12 10:27:35,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:35,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:27:35,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341842614] [2020-10-12 10:27:35,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:27:35,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:35,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:27:35,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:27:35,572 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand 29 states. [2020-10-12 10:27:37,128 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-10-12 10:27:37,653 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-12 10:27:37,883 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-12 10:27:38,069 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-10-12 10:27:38,301 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-12 10:27:39,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:27:39,529 INFO L93 Difference]: Finished difference Result 119 states and 141 transitions. [2020-10-12 10:27:39,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:27:39,530 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 73 [2020-10-12 10:27:39,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:27:39,531 INFO L225 Difference]: With dead ends: 119 [2020-10-12 10:27:39,531 INFO L226 Difference]: Without dead ends: 117 [2020-10-12 10:27:39,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=283, Invalid=2797, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 10:27:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-12 10:27:39,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 100. [2020-10-12 10:27:39,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-12 10:27:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2020-10-12 10:27:39,553 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 73 [2020-10-12 10:27:39,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:27:39,553 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2020-10-12 10:27:39,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 10:27:39,553 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2020-10-12 10:27:39,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 10:27:39,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:27:39,554 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:27:39,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 10:27:39,555 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:27:39,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:27:39,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1842649286, now seen corresponding path program 15 times [2020-10-12 10:27:39,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:27:39,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246707720] [2020-10-12 10:27:39,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:27:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:39,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:39,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:39,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:39,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:39,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:40,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:41,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:41,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:41,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:41,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:41,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:42,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:42,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:42,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:42,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:42,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:42,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:43,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:44,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:44,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 10:27:44,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-12 10:27:44,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 10:27:44,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:44,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:27:44,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:27:44,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 10:27:44,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:45,081 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-12 10:27:45,233 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-12 10:27:45,400 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-12 10:27:45,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:45,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:45,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:45,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:45,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:45,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:45,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:45,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:45,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:45,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:45,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:45,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:45,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:45,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:45,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:45,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:45,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:45,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:45,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:45,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:45,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 10:27:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:45,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:45,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:45,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:45,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:45,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:45,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:45,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:45,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:45,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:45,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 10:27:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:45,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:45,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:45,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:45,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:45,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:45,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:45,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:45,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:45,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:45,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-12 10:27:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:45,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:45,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:45,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:45,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:45,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:45,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:45,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:45,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:45,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:45,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-12 10:27:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:45,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:45,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:45,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:45,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:45,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:45,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:45,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:45,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:45,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:45,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 8 proven. 65 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 10:27:45,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246707720] [2020-10-12 10:27:45,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:45,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:27:45,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964679567] [2020-10-12 10:27:45,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:27:45,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:45,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:27:45,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:27:45,864 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand 23 states. [2020-10-12 10:27:46,567 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-12 10:27:46,745 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-12 10:27:47,018 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-12 10:27:47,197 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-12 10:27:47,445 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-12 10:27:47,831 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-12 10:27:48,063 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-10-12 10:27:48,283 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-12 10:27:48,558 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-12 10:27:48,947 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-12 10:27:49,213 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-12 10:27:49,586 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-12 10:27:49,799 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-12 10:27:50,067 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-10-12 10:27:50,321 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-12 10:27:50,602 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-10-12 10:27:50,783 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-12 10:27:51,039 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-12 10:27:51,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:27:51,148 INFO L93 Difference]: Finished difference Result 172 states and 203 transitions. [2020-10-12 10:27:51,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:27:51,148 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 73 [2020-10-12 10:27:51,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:27:51,149 INFO L225 Difference]: With dead ends: 172 [2020-10-12 10:27:51,150 INFO L226 Difference]: Without dead ends: 170 [2020-10-12 10:27:51,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=286, Invalid=2264, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 10:27:51,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-12 10:27:51,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 111. [2020-10-12 10:27:51,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-12 10:27:51,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2020-10-12 10:27:51,171 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 73 [2020-10-12 10:27:51,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:27:51,171 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2020-10-12 10:27:51,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:27:51,172 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2020-10-12 10:27:51,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 10:27:51,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:27:51,173 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:27:51,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 10:27:51,173 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:27:51,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:27:51,173 INFO L82 PathProgramCache]: Analyzing trace with hash -771487522, now seen corresponding path program 16 times [2020-10-12 10:27:51,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:27:51,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550664578] [2020-10-12 10:27:51,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:27:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:51,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:51,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:51,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:51,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:51,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:51,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:52,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:53,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:53,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:53,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:53,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:53,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:54,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:54,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:54,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:54,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:55,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:55,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:56,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:56,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:56,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:56,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:56,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-12 10:27:56,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-12 10:27:56,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-12 10:27:56,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:56,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 10:27:56,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:27:56,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 10:27:56,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:57,026 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-12 10:27:57,226 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-12 10:27:57,690 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-10-12 10:27:57,888 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2020-10-12 10:27:58,176 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 60 [2020-10-12 10:27:58,335 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-12 10:27:59,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:27:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:59,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:59,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:59,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:27:59,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:59,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:59,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:59,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:59,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:59,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:59,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:59,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:27:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:59,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:59,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:59,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:59,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:59,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:59,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:59,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:27:59,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:59,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:27:59,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:59,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 10:27:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:59,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:59,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:59,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:59,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:59,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:59,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:59,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:59,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:59,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:59,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:59,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-12 10:27:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:59,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:59,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:59,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:59,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:59,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:27:59,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:59,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:59,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:59,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:59,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:59,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-12 10:27:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:27:59,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:27:59,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:27:59,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:27:59,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:27:59,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:27:59,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:27:59,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:27:59,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:27:59,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:27:59,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:27:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 7 proven. 128 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 10:27:59,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550664578] [2020-10-12 10:27:59,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:27:59,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:27:59,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725111649] [2020-10-12 10:27:59,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:27:59,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:27:59,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:27:59,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=746, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:27:59,215 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand 29 states. [2020-10-12 10:27:59,723 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 33 [2020-10-12 10:27:59,951 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2020-10-12 10:28:00,118 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2020-10-12 10:28:00,427 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2020-10-12 10:28:00,881 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2020-10-12 10:28:01,132 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-12 10:28:01,471 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-12 10:28:01,707 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 62 [2020-10-12 10:28:02,038 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2020-10-12 10:28:02,343 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-10-12 10:28:04,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:28:04,436 INFO L93 Difference]: Finished difference Result 178 states and 214 transitions. [2020-10-12 10:28:04,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 10:28:04,437 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-10-12 10:28:04,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:28:04,439 INFO L225 Difference]: With dead ends: 178 [2020-10-12 10:28:04,440 INFO L226 Difference]: Without dead ends: 176 [2020-10-12 10:28:04,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=294, Invalid=2898, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 10:28:04,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-12 10:28:04,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 149. [2020-10-12 10:28:04,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-12 10:28:04,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 175 transitions. [2020-10-12 10:28:04,468 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 175 transitions. Word has length 79 [2020-10-12 10:28:04,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:28:04,468 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 175 transitions. [2020-10-12 10:28:04,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 10:28:04,468 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 175 transitions. [2020-10-12 10:28:04,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 10:28:04,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:28:04,470 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:28:04,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 10:28:04,470 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:28:04,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:28:04,470 INFO L82 PathProgramCache]: Analyzing trace with hash 810925109, now seen corresponding path program 17 times [2020-10-12 10:28:04,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:28:04,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890176068] [2020-10-12 10:28:04,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:28:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:04,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:04,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:04,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:04,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:04,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:04,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:04,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:05,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:06,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:06,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:06,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:06,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:06,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:07,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:07,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:07,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:09,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:09,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 10:28:09,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 10:28:09,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:28:09,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:09,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 10:28:09,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:28:09,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 10:28:09,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:10,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:28:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:10,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:10,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:10,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:28:10,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:10,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:10,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:10,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:10,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:10,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:10,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:10,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:28:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:10,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:10,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:10,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:10,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:10,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:10,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:10,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:10,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:10,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:10,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:10,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 10:28:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:10,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:10,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:10,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:10,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:10,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:28:10,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:10,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:10,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:10,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:10,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:10,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 10:28:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:10,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:10,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:10,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:10,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:10,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:28:10,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:10,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:28:10,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:10,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:28:10,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:10,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-12 10:28:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:10,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:10,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:10,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:10,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:10,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:28:10,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:10,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:28:10,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:10,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:28:10,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:10,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-12 10:28:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:10,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:10,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:10,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:10,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:10,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:28:10,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:10,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:28:10,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:10,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:28:10,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:10,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-12 10:28:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:10,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:10,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:10,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:10,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:10,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:28:10,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:10,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:10,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:28:10,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:10,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 57 proven. 51 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-12 10:28:10,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890176068] [2020-10-12 10:28:10,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:28:10,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:28:10,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085146426] [2020-10-12 10:28:10,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:28:10,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:28:10,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:28:10,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:28:10,365 INFO L87 Difference]: Start difference. First operand 149 states and 175 transitions. Second operand 22 states. [2020-10-12 10:28:12,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:28:12,041 INFO L93 Difference]: Finished difference Result 185 states and 221 transitions. [2020-10-12 10:28:12,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:28:12,042 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2020-10-12 10:28:12,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:28:12,043 INFO L225 Difference]: With dead ends: 185 [2020-10-12 10:28:12,044 INFO L226 Difference]: Without dead ends: 169 [2020-10-12 10:28:12,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=213, Invalid=1347, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 10:28:12,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-12 10:28:12,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 154. [2020-10-12 10:28:12,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-12 10:28:12,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 181 transitions. [2020-10-12 10:28:12,072 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 181 transitions. Word has length 82 [2020-10-12 10:28:12,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:28:12,072 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 181 transitions. [2020-10-12 10:28:12,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:28:12,073 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 181 transitions. [2020-10-12 10:28:12,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 10:28:12,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:28:12,074 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:28:12,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 10:28:12,074 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:28:12,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:28:12,074 INFO L82 PathProgramCache]: Analyzing trace with hash -200192141, now seen corresponding path program 18 times [2020-10-12 10:28:12,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:28:12,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845366293] [2020-10-12 10:28:12,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:28:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:12,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:12,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:12,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:12,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:12,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:12,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:15,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:15,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 10:28:15,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:28:15,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3563 [2020-10-12 10:28:15,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:15,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:28:15,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:28:15,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 10:28:15,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:15,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:28:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:15,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:15,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:15,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:28:15,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:15,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:15,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:15,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:15,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:15,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:15,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:15,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:28:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:15,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:15,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:15,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:15,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:15,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:15,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:15,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:15,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:15,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:15,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:15,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 10:28:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:15,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:15,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:15,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:15,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:15,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:28:15,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:15,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:15,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:15,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:15,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:15,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 10:28:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:15,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:15,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:15,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:15,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:15,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:15,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:15,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:15,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:15,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:15,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:15,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-12 10:28:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:15,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:15,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:15,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:15,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:15,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:15,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:15,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:15,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:15,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:15,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:15,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-12 10:28:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:15,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:15,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:15,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:15,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:15,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:15,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:15,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:28:15,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:28:15,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:15,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:15,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-12 10:28:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:16,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:16,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:16,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:16,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:16,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:16,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:16,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:16,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:28:16,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:16,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 55 proven. 50 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-12 10:28:16,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845366293] [2020-10-12 10:28:16,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:28:16,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:28:16,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179958469] [2020-10-12 10:28:16,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:28:16,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:28:16,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:28:16,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:28:16,016 INFO L87 Difference]: Start difference. First operand 154 states and 181 transitions. Second operand 16 states. [2020-10-12 10:28:17,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:28:17,159 INFO L93 Difference]: Finished difference Result 224 states and 267 transitions. [2020-10-12 10:28:17,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:28:17,165 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 82 [2020-10-12 10:28:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:28:17,167 INFO L225 Difference]: With dead ends: 224 [2020-10-12 10:28:17,167 INFO L226 Difference]: Without dead ends: 198 [2020-10-12 10:28:17,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:28:17,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-12 10:28:17,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 182. [2020-10-12 10:28:17,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-12 10:28:17,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2020-10-12 10:28:17,231 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 82 [2020-10-12 10:28:17,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:28:17,232 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2020-10-12 10:28:17,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:28:17,232 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2020-10-12 10:28:17,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 10:28:17,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:28:17,236 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:28:17,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 10:28:17,237 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:28:17,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:28:17,237 INFO L82 PathProgramCache]: Analyzing trace with hash -994513225, now seen corresponding path program 19 times [2020-10-12 10:28:17,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:28:17,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039935380] [2020-10-12 10:28:17,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:28:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:17,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:17,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:17,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:17,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:17,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:17,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:17,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:17,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:19,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:19,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:19,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:19,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:19,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:19,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:20,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:20,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:20,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:22,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:22,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 10:28:22,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-12 10:28:22,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:28:22,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:22,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:28:22,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:28:22,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 10:28:22,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:22,673 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2020-10-12 10:28:22,833 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-12 10:28:23,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:28:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:23,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:23,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:23,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:28:23,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:23,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:23,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:23,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:23,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:23,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:23,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:23,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-12 10:28:23,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:23,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:23,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:23,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:23,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:23,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:23,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:23,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:23,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:23,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:23,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:23,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 10:28:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:23,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:23,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:23,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:23,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:23,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:23,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:23,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:23,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:23,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:23,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:23,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 10:28:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:23,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:23,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:23,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:23,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:23,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:23,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:23,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:23,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:23,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:23,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:23,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-12 10:28:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:23,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:23,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:23,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:23,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:23,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:23,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:23,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:28:23,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:28:23,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:23,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:23,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-12 10:28:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:23,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:23,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:23,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:23,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:23,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:23,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:23,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:28:23,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:28:23,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:28:23,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:23,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-12 10:28:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:23,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:23,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:23,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:28:23,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:28:23,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:28:23,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:23,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:28:23,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 10:28:23,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:28:23,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-12 10:28:23,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039935380] [2020-10-12 10:28:23,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:28:23,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:28:23,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305598471] [2020-10-12 10:28:23,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:28:23,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:28:23,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:28:23,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:28:23,285 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand 21 states. [2020-10-12 10:28:24,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:28:24,618 INFO L93 Difference]: Finished difference Result 346 states and 420 transitions. [2020-10-12 10:28:24,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:28:24,619 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 82 [2020-10-12 10:28:24,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:28:24,622 INFO L225 Difference]: With dead ends: 346 [2020-10-12 10:28:24,622 INFO L226 Difference]: Without dead ends: 301 [2020-10-12 10:28:24,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:28:24,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-12 10:28:24,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 277. [2020-10-12 10:28:24,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-12 10:28:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 332 transitions. [2020-10-12 10:28:24,684 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 332 transitions. Word has length 82 [2020-10-12 10:28:24,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:28:24,684 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 332 transitions. [2020-10-12 10:28:24,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:28:24,685 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 332 transitions. [2020-10-12 10:28:24,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 10:28:24,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:28:24,686 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:28:24,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 10:28:24,686 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:28:24,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:28:24,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1416989950, now seen corresponding path program 20 times [2020-10-12 10:28:24,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:28:24,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115872404] [2020-10-12 10:28:24,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:28:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:28:24,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:24,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:24,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:24,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:25,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:25,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:25,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:26,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:26,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:26,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:27,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:27,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:27,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:27,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:27,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:27,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:28,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:28,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:29,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:29,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:29,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:28:29,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:28:29,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-12 10:28:29,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-12 10:28:29,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-12 10:28:29,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:28:29,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:28:29,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 10:28:29,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 10:28:29,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:28:34,191 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2020-10-12 10:28:34,521 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 42 [2020-10-12 10:28:35,116 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 37 [2020-10-12 10:29:04,254 WARN L193 SmtUtils]: Spent 28.87 s on a formula simplification. DAG size of input: 741 DAG size of output: 97 [2020-10-12 10:29:42,289 WARN L193 SmtUtils]: Spent 37.53 s on a formula simplification. DAG size of input: 842 DAG size of output: 119 [2020-10-12 10:30:07,222 WARN L193 SmtUtils]: Spent 23.46 s on a formula simplification. DAG size of input: 491 DAG size of output: 110