/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 SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 14:45:45,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:45:45,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:45:45,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:45:45,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:45:45,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:45:45,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:45:45,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:45:45,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:45:45,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:45:45,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:45:45,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:45:45,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:45:45,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:45:45,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:45:45,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:45:45,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:45:45,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:45:45,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:45:45,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:45:45,209 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:45:45,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:45:45,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:45:45,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:45:45,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:45:45,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:45:45,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:45:45,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:45:45,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:45:45,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:45:45,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:45:45,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:45:45,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:45:45,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:45:45,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:45:45,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:45:45,235 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:45:45,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:45:45,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:45:45,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:45:45,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:45:45,251 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 [2020-09-25 14:45:45,278 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:45:45,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:45:45,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:45:45,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:45:45,280 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:45:45,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:45:45,281 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:45:45,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:45:45,281 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:45:45,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:45:45,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:45:45,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:45:45,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:45:45,282 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:45:45,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:45:45,282 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:45:45,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:45:45,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:45:45,283 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:45:45,283 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:45:45,283 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:45:45,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:45:45,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:45:45,284 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:45:45,284 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:45:45,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:45:45,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:45:45,285 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:45:45,285 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:45:45,285 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 -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-09-25 14:45:45,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:45:45,814 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:45:45,832 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:45:45,849 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:45:45,851 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:45:45,852 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-25 14:45:45,959 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a0b51af7/c9bb971402974c6da326977b39ce6cd8/FLAG96317a238 [2020-09-25 14:45:46,493 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:45:46,494 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-25 14:45:46,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a0b51af7/c9bb971402974c6da326977b39ce6cd8/FLAG96317a238 [2020-09-25 14:45:46,834 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a0b51af7/c9bb971402974c6da326977b39ce6cd8 [2020-09-25 14:45:46,847 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:45:46,853 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:45:46,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:45:46,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:45:46,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:45:46,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:45:46" (1/1) ... [2020-09-25 14:45:46,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68901205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:45:46, skipping insertion in model container [2020-09-25 14:45:46,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:45:46" (1/1) ... [2020-09-25 14:45:46,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:45:46,901 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:45:47,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:45:47,158 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:45:47,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:45:47,204 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:45:47,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:45:47 WrapperNode [2020-09-25 14:45:47,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:45:47,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:45:47,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:45:47,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:45:47,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:45:47" (1/1) ... [2020-09-25 14:45:47,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:45:47" (1/1) ... [2020-09-25 14:45:47,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:45:47" (1/1) ... [2020-09-25 14:45:47,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:45:47" (1/1) ... [2020-09-25 14:45:47,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:45:47" (1/1) ... [2020-09-25 14:45:47,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:45:47" (1/1) ... [2020-09-25 14:45:47,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:45:47" (1/1) ... [2020-09-25 14:45:47,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:45:47,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:45:47,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:45:47,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:45:47,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:45:47" (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 [2020-09-25 14:45:47,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:45:47,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:45:47,423 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 14:45:47,423 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-25 14:45:47,424 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:45:47,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:45:47,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 14:45:47,424 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 14:45:47,424 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-09-25 14:45:47,425 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 14:45:47,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 14:45:47,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 14:45:47,425 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:45:47,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 14:45:47,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 14:45:47,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 14:45:47,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:45:47,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:45:47,745 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:45:47,746 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 14:45:47,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:45:47 BoogieIcfgContainer [2020-09-25 14:45:47,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:45:47,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:45:47,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:45:47,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:45:47,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:45:46" (1/3) ... [2020-09-25 14:45:47,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ffd65b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:45:47, skipping insertion in model container [2020-09-25 14:45:47,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:45:47" (2/3) ... [2020-09-25 14:45:47,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ffd65b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:45:47, skipping insertion in model container [2020-09-25 14:45:47,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:45:47" (3/3) ... [2020-09-25 14:45:47,763 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-09-25 14:45:47,787 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:45:47,812 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:45:47,854 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:45:47,882 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:45:47,882 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:45:47,883 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:45:47,883 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:45:47,883 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:45:47,883 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:45:47,883 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:45:47,883 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:45:47,909 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-25 14:45:47,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 14:45:47,918 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:45:47,920 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:45:47,920 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:45:47,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:45:47,927 INFO L82 PathProgramCache]: Analyzing trace with hash -2004589429, now seen corresponding path program 1 times [2020-09-25 14:45:47,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:45:47,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561514351] [2020-09-25 14:45:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:45:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:48,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:48,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:48,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:45:48,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 14:45:48,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:45:48,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-09-25 14:45:48,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:45:48,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:45:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:45:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 14:45:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:45:48,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 14:45:48,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:45:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:48,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:48,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:45:48,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:45:48,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:45:48,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 14:45:48,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:45:48,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:45:48,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:45:48,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:45:48,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:45:48,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:45:48,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 14:45:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:48,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:48,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:45:48,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 14:45:48,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:45:48,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 14:45:48,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:45:48,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:45:48,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:45:48,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 14:45:48,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:45:48,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:45:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:45:48,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561514351] [2020-09-25 14:45:48,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:45:48,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 14:45:48,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487623762] [2020-09-25 14:45:48,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 14:45:48,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:45:48,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 14:45:48,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 14:45:48,597 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 4 states. [2020-09-25 14:45:48,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:45:48,846 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-09-25 14:45:48,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 14:45:48,848 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-09-25 14:45:48,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:45:48,865 INFO L225 Difference]: With dead ends: 94 [2020-09-25 14:45:48,865 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 14:45:48,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:45:48,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 14:45:48,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-09-25 14:45:48,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-25 14:45:48,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-09-25 14:45:48,924 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-09-25 14:45:48,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:45:48,925 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-09-25 14:45:48,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 14:45:48,925 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-09-25 14:45:48,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 14:45:48,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:45:48,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:45:48,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:45:48,928 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:45:48,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:45:48,929 INFO L82 PathProgramCache]: Analyzing trace with hash 929440641, now seen corresponding path program 1 times [2020-09-25 14:45:48,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:45:48,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57014110] [2020-09-25 14:45:48,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:45:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:48,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:48,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:49,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:45:49,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 14:45:49,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:45:49,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-09-25 14:45:49,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:45:49,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:45:49,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:45:49,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 14:45:49,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 14:45:49,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:45:49,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:45:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:49,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:49,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:45:49,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:45:49,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:45:49,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 14:45:49,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:45:49,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:45:49,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:45:49,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:45:49,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:45:49,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:45:49,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 14:45:49,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:49,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:49,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:45:49,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 14:45:49,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:45:49,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 14:45:49,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:45:49,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:45:49,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:45:49,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 14:45:49,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 14:45:49,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:45:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:45:49,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57014110] [2020-09-25 14:45:49,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:45:49,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 14:45:49,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188730181] [2020-09-25 14:45:49,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 14:45:49,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:45:49,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 14:45:49,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 14:45:49,440 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 7 states. [2020-09-25 14:45:49,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:45:49,713 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-09-25 14:45:49,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 14:45:49,714 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-25 14:45:49,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:45:49,715 INFO L225 Difference]: With dead ends: 81 [2020-09-25 14:45:49,716 INFO L226 Difference]: Without dead ends: 54 [2020-09-25 14:45:49,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 14:45:49,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-25 14:45:49,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-25 14:45:49,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 14:45:49,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-25 14:45:49,727 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-25 14:45:49,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:45:49,728 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-25 14:45:49,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 14:45:49,728 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-25 14:45:49,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-25 14:45:49,730 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:45:49,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:45:49,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:45:49,731 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:45:49,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:45:49,731 INFO L82 PathProgramCache]: Analyzing trace with hash -300797571, now seen corresponding path program 1 times [2020-09-25 14:45:49,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:45:49,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248258845] [2020-09-25 14:45:49,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:45:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:49,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:49,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:50,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:45:50,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 14:45:50,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:45:50,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-09-25 14:45:50,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:45:50,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:45:50,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:45:50,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 14:45:50,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 14:45:50,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:45:50,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:45:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:50,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:50,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:45:50,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:45:50,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:45:50,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 14:45:50,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:45:50,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:45:50,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:45:50,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:45:50,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:45:50,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:45:50,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 14:45:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:50,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:50,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:45:50,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 14:45:50,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:45:50,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-09-25 14:45:50,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:45:50,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:45:50,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:45:50,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 14:45:50,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 14:45:50,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 14:45:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:45:50,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248258845] [2020-09-25 14:45:50,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:45:50,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 14:45:50,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480443327] [2020-09-25 14:45:50,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 14:45:50,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:45:50,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 14:45:50,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-25 14:45:50,470 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 9 states. [2020-09-25 14:45:50,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:45:50,799 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2020-09-25 14:45:50,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 14:45:50,800 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-09-25 14:45:50,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:45:50,802 INFO L225 Difference]: With dead ends: 87 [2020-09-25 14:45:50,802 INFO L226 Difference]: Without dead ends: 60 [2020-09-25 14:45:50,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-09-25 14:45:50,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-25 14:45:50,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-09-25 14:45:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-25 14:45:50,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-09-25 14:45:50,812 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-09-25 14:45:50,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:45:50,813 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-09-25 14:45:50,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 14:45:50,813 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-09-25 14:45:50,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 14:45:50,815 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:45:50,815 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-09-25 14:45:50,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:45:50,815 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:45:50,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:45:50,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1218260359, now seen corresponding path program 2 times [2020-09-25 14:45:50,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:45:50,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826064511] [2020-09-25 14:45:50,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:45:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:50,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:50,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:51,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:45:51,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 14:45:51,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:45:51,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 666 [2020-09-25 14:45:51,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:45:51,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:45:51,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 14:45:51,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 14:45:51,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 14:45:51,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:45:51,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:45:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:51,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:51,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:45:51,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:45:51,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:45:51,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 14:45:51,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:45:51,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:45:51,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:45:51,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:45:51,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:45:51,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:45:51,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 14:45:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:51,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:51,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:45:51,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:45:51,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:45:51,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-09-25 14:45:51,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:45:51,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:45:51,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 14:45:51,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 14:45:51,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 14:45:51,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:45:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:45:51,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826064511] [2020-09-25 14:45:51,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:45:51,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 14:45:51,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069704436] [2020-09-25 14:45:51,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 14:45:51,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:45:51,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 14:45:51,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 14:45:51,829 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 11 states. [2020-09-25 14:45:52,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:45:52,215 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2020-09-25 14:45:52,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 14:45:52,215 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-09-25 14:45:52,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:45:52,217 INFO L225 Difference]: With dead ends: 93 [2020-09-25 14:45:52,217 INFO L226 Difference]: Without dead ends: 66 [2020-09-25 14:45:52,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2020-09-25 14:45:52,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-25 14:45:52,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-09-25 14:45:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-25 14:45:52,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-09-25 14:45:52,227 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 41 [2020-09-25 14:45:52,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:45:52,227 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-09-25 14:45:52,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 14:45:52,227 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-09-25 14:45:52,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-25 14:45:52,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:45:52,229 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-09-25 14:45:52,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 14:45:52,230 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:45:52,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:45:52,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1012778613, now seen corresponding path program 3 times [2020-09-25 14:45:52,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:45:52,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467944324] [2020-09-25 14:45:52,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:45:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:52,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:52,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:53,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:45:53,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 14:45:53,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:45:53,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 852 [2020-09-25 14:45:53,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:45:53,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:45:53,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 14:45:53,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 14:45:53,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 14:45:53,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:45:53,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:45:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:53,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:53,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:45:53,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:45:53,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:45:53,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 14:45:53,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:45:53,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:45:53,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:45:53,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:45:53,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:45:53,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:45:53,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 14:45:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:53,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:53,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:45:53,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 14:45:53,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:45:53,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-09-25 14:45:53,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:45:53,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:45:53,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 14:45:53,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 14:45:53,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 14:45:53,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:45:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:45:53,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467944324] [2020-09-25 14:45:53,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:45:53,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 14:45:53,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980990761] [2020-09-25 14:45:53,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 14:45:53,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:45:53,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 14:45:53,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-25 14:45:53,748 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 13 states. [2020-09-25 14:45:54,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:45:54,248 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2020-09-25 14:45:54,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 14:45:54,249 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-09-25 14:45:54,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:45:54,252 INFO L225 Difference]: With dead ends: 99 [2020-09-25 14:45:54,252 INFO L226 Difference]: Without dead ends: 72 [2020-09-25 14:45:54,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2020-09-25 14:45:54,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-25 14:45:54,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2020-09-25 14:45:54,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-25 14:45:54,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-09-25 14:45:54,271 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 47 [2020-09-25 14:45:54,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:45:54,272 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-09-25 14:45:54,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 14:45:54,272 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-09-25 14:45:54,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-25 14:45:54,274 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:45:54,274 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:45:54,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 14:45:54,274 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:45:54,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:45:54,275 INFO L82 PathProgramCache]: Analyzing trace with hash 985189745, now seen corresponding path program 4 times [2020-09-25 14:45:54,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:45:54,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391995816] [2020-09-25 14:45:54,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:45:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:54,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:54,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:55,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:45:55,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 14:45:55,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:45:55,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1206 [2020-09-25 14:45:55,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:45:55,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:45:55,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 14:45:55,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 14:45:55,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 14:45:55,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:45:55,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:45:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:55,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:55,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:45:55,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:45:55,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:45:55,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 14:45:55,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:45:55,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:45:55,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:45:55,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:45:55,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:45:55,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:45:55,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 14:45:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:55,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:55,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:45:55,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-25 14:45:55,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:45:55,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-09-25 14:45:55,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:45:55,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:45:55,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 14:45:55,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 14:45:55,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 14:45:55,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:45:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:45:56,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391995816] [2020-09-25 14:45:56,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:45:56,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 14:45:56,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010205684] [2020-09-25 14:45:56,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 14:45:56,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:45:56,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 14:45:56,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-09-25 14:45:56,097 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 15 states. [2020-09-25 14:45:56,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:45:56,688 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2020-09-25 14:45:56,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 14:45:56,689 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-09-25 14:45:56,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:45:56,690 INFO L225 Difference]: With dead ends: 105 [2020-09-25 14:45:56,691 INFO L226 Difference]: Without dead ends: 78 [2020-09-25 14:45:56,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-09-25 14:45:56,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-25 14:45:56,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2020-09-25 14:45:56,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-25 14:45:56,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-09-25 14:45:56,700 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 53 [2020-09-25 14:45:56,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:45:56,701 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-09-25 14:45:56,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 14:45:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-09-25 14:45:56,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 14:45:56,702 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:45:56,702 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:45:56,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 14:45:56,703 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:45:56,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:45:56,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1088005997, now seen corresponding path program 5 times [2020-09-25 14:45:56,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:45:56,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553625213] [2020-09-25 14:45:56,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:45:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:56,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:56,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:58,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:45:58,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-25 14:45:58,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:45:58,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1419 [2020-09-25 14:45:58,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:45:58,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:45:58,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 14:45:58,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 14:45:58,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 14:45:58,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:45:58,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:45:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:58,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:58,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:45:58,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:45:58,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:45:58,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 14:45:58,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:45:58,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:45:58,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:45:58,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:45:58,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:45:58,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:45:58,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 14:45:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:58,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:58,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:45:58,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 14:45:58,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:45:58,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-09-25 14:45:58,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:45:58,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:45:58,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 14:45:58,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 14:45:58,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 14:45:58,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:45:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:45:58,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553625213] [2020-09-25 14:45:58,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:45:58,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 14:45:58,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029975310] [2020-09-25 14:45:58,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 14:45:58,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:45:58,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 14:45:58,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-25 14:45:58,854 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 17 states. [2020-09-25 14:45:59,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:45:59,545 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2020-09-25 14:45:59,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 14:45:59,546 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-09-25 14:45:59,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:45:59,547 INFO L225 Difference]: With dead ends: 111 [2020-09-25 14:45:59,547 INFO L226 Difference]: Without dead ends: 84 [2020-09-25 14:45:59,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 14:45:59,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-25 14:45:59,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2020-09-25 14:45:59,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-25 14:45:59,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-09-25 14:45:59,564 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 59 [2020-09-25 14:45:59,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:45:59,565 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-09-25 14:45:59,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 14:45:59,565 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-09-25 14:45:59,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-25 14:45:59,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:45:59,569 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:45:59,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 14:45:59,570 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:45:59,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:45:59,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1775637609, now seen corresponding path program 6 times [2020-09-25 14:45:59,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:45:59,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655851405] [2020-09-25 14:45:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:45:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:45:59,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:45:59,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:01,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:01,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 14:46:01,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:46:01,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1889 [2020-09-25 14:46:01,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:01,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:01,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 14:46:01,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 14:46:01,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 14:46:01,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:46:01,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:46:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:01,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:01,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:01,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:46:01,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:46:01,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 14:46:01,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:01,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:01,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:46:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:46:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:46:01,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 14:46:01,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 14:46:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:01,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:02,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:02,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-25 14:46:02,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:46:02,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-09-25 14:46:02,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:02,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:02,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 14:46:02,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 14:46:02,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 14:46:02,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:46:02,344 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:46:02,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655851405] [2020-09-25 14:46:02,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:46:02,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 14:46:02,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911214342] [2020-09-25 14:46:02,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 14:46:02,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:46:02,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 14:46:02,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-09-25 14:46:02,346 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 19 states. [2020-09-25 14:46:03,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:46:03,391 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2020-09-25 14:46:03,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 14:46:03,392 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 65 [2020-09-25 14:46:03,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:46:03,395 INFO L225 Difference]: With dead ends: 117 [2020-09-25 14:46:03,395 INFO L226 Difference]: Without dead ends: 90 [2020-09-25 14:46:03,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2020-09-25 14:46:03,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-25 14:46:03,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2020-09-25 14:46:03,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-25 14:46:03,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2020-09-25 14:46:03,420 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 65 [2020-09-25 14:46:03,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:46:03,420 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2020-09-25 14:46:03,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 14:46:03,423 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2020-09-25 14:46:03,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 14:46:03,424 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:46:03,425 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:46:03,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 14:46:03,425 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:46:03,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:46:03,431 INFO L82 PathProgramCache]: Analyzing trace with hash 427021413, now seen corresponding path program 7 times [2020-09-25 14:46:03,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:46:03,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56417534] [2020-09-25 14:46:03,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:46:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:03,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:03,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:05,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:05,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-25 14:46:05,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:46:05,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2434 [2020-09-25 14:46:05,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:05,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:05,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 14:46:05,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 14:46:05,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-25 14:46:05,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:46:05,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:46:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:05,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:05,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:05,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:46:05,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:46:05,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 14:46:05,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:05,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:05,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:46:05,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:46:05,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:46:05,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:46:05,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 14:46:05,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:05,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:06,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:06,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 14:46:06,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:46:06,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 712 [2020-09-25 14:46:06,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:06,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:06,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 14:46:06,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 14:46:06,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 14:46:06,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:46:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:46:07,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56417534] [2020-09-25 14:46:07,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:46:07,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-25 14:46:07,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844217961] [2020-09-25 14:46:07,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-25 14:46:07,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:46:07,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-25 14:46:07,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-09-25 14:46:07,113 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 21 states. [2020-09-25 14:46:07,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:46:07,994 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2020-09-25 14:46:07,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-25 14:46:07,994 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 71 [2020-09-25 14:46:07,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:46:07,996 INFO L225 Difference]: With dead ends: 123 [2020-09-25 14:46:07,996 INFO L226 Difference]: Without dead ends: 96 [2020-09-25 14:46:08,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=530, Invalid=1632, Unknown=0, NotChecked=0, Total=2162 [2020-09-25 14:46:08,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-25 14:46:08,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2020-09-25 14:46:08,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-25 14:46:08,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2020-09-25 14:46:08,009 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 71 [2020-09-25 14:46:08,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:46:08,010 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2020-09-25 14:46:08,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-25 14:46:08,011 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2020-09-25 14:46:08,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-25 14:46:08,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:46:08,013 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:46:08,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 14:46:08,014 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:46:08,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:46:08,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1205295263, now seen corresponding path program 8 times [2020-09-25 14:46:08,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:46:08,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090808385] [2020-09-25 14:46:08,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:46:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:08,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:08,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:10,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:10,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-25 14:46:10,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:46:10,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2659 [2020-09-25 14:46:10,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:10,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:10,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 14:46:10,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 14:46:10,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-25 14:46:10,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:46:10,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:46:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:10,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:10,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:10,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:46:10,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:46:10,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 14:46:10,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:10,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:10,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:46:10,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:46:10,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:46:10,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:46:10,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 14:46:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:10,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:11,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:11,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 14:46:11,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:46:11,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 795 [2020-09-25 14:46:11,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:11,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:11,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 14:46:11,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 14:46:11,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-25 14:46:11,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:46:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:46:11,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090808385] [2020-09-25 14:46:11,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:46:11,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-25 14:46:11,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52811144] [2020-09-25 14:46:11,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-25 14:46:11,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:46:11,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-25 14:46:11,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2020-09-25 14:46:11,911 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 23 states. [2020-09-25 14:46:13,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:46:13,106 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2020-09-25 14:46:13,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-25 14:46:13,107 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 77 [2020-09-25 14:46:13,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:46:13,108 INFO L225 Difference]: With dead ends: 129 [2020-09-25 14:46:13,108 INFO L226 Difference]: Without dead ends: 102 [2020-09-25 14:46:13,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=656, Invalid=1996, Unknown=0, NotChecked=0, Total=2652 [2020-09-25 14:46:13,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-25 14:46:13,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2020-09-25 14:46:13,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-25 14:46:13,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2020-09-25 14:46:13,126 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 77 [2020-09-25 14:46:13,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:46:13,127 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2020-09-25 14:46:13,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-25 14:46:13,130 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2020-09-25 14:46:13,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-25 14:46:13,131 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:46:13,131 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:46:13,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 14:46:13,132 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:46:13,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:46:13,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1863994717, now seen corresponding path program 9 times [2020-09-25 14:46:13,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:46:13,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179198719] [2020-09-25 14:46:13,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:46:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:13,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:13,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:16,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:16,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-09-25 14:46:16,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:46:16,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2923 [2020-09-25 14:46:16,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:16,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:16,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 14:46:16,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 14:46:16,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-25 14:46:16,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:46:16,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:46:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:16,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:16,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:16,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:46:16,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:46:16,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 14:46:16,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:16,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:16,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:46:16,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:46:16,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:46:16,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:46:16,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 14:46:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:16,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:17,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:17,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 14:46:17,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:46:17,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 944 [2020-09-25 14:46:17,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:17,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:17,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 14:46:17,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 14:46:17,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-25 14:46:17,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:46:17,565 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:46:17,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179198719] [2020-09-25 14:46:17,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:46:17,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-25 14:46:17,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89140852] [2020-09-25 14:46:17,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-25 14:46:17,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:46:17,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-25 14:46:17,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-09-25 14:46:17,569 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 25 states. [2020-09-25 14:46:18,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:46:18,886 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2020-09-25 14:46:18,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-25 14:46:18,887 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 83 [2020-09-25 14:46:18,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:46:18,889 INFO L225 Difference]: With dead ends: 135 [2020-09-25 14:46:18,889 INFO L226 Difference]: Without dead ends: 108 [2020-09-25 14:46:18,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=796, Invalid=2396, Unknown=0, NotChecked=0, Total=3192 [2020-09-25 14:46:18,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-25 14:46:18,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2020-09-25 14:46:18,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-25 14:46:18,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-09-25 14:46:18,899 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 83 [2020-09-25 14:46:18,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:46:18,900 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-09-25 14:46:18,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-25 14:46:18,900 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-09-25 14:46:18,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-25 14:46:18,901 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:46:18,901 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:46:18,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 14:46:18,902 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:46:18,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:46:18,902 INFO L82 PathProgramCache]: Analyzing trace with hash -467761575, now seen corresponding path program 10 times [2020-09-25 14:46:18,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:46:18,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186817228] [2020-09-25 14:46:18,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:46:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:18,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:18,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:22,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:22,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-25 14:46:22,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:46:22,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3280 [2020-09-25 14:46:22,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:22,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:22,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-25 14:46:22,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 14:46:22,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-25 14:46:22,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:46:22,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:46:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:22,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:22,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:22,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:46:22,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:46:22,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 14:46:22,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:22,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:22,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:46:22,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:46:22,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:46:22,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:46:22,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 14:46:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:22,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:23,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:23,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 14:46:23,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:46:23,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 970 [2020-09-25 14:46:23,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:23,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:23,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-25 14:46:23,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 14:46:23,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-25 14:46:23,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:46:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:46:23,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186817228] [2020-09-25 14:46:23,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:46:23,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-25 14:46:23,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208187903] [2020-09-25 14:46:23,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-25 14:46:23,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:46:23,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-25 14:46:23,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2020-09-25 14:46:23,832 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 27 states. [2020-09-25 14:46:25,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:46:25,410 INFO L93 Difference]: Finished difference Result 141 states and 149 transitions. [2020-09-25 14:46:25,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-25 14:46:25,411 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 89 [2020-09-25 14:46:25,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:46:25,412 INFO L225 Difference]: With dead ends: 141 [2020-09-25 14:46:25,412 INFO L226 Difference]: Without dead ends: 114 [2020-09-25 14:46:25,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=936, Invalid=2724, Unknown=0, NotChecked=0, Total=3660 [2020-09-25 14:46:25,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-25 14:46:25,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2020-09-25 14:46:25,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-25 14:46:25,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-09-25 14:46:25,420 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 89 [2020-09-25 14:46:25,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:46:25,420 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-09-25 14:46:25,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-25 14:46:25,420 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-09-25 14:46:25,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-25 14:46:25,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:46:25,421 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:46:25,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 14:46:25,422 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:46:25,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:46:25,422 INFO L82 PathProgramCache]: Analyzing trace with hash -172289451, now seen corresponding path program 11 times [2020-09-25 14:46:25,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:46:25,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950694748] [2020-09-25 14:46:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:46:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:25,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:25,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:28,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:28,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-25 14:46:28,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:46:28,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3215 [2020-09-25 14:46:28,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:28,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:28,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-25 14:46:28,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 14:46:28,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-09-25 14:46:28,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:46:28,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:46:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:28,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:28,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:28,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 14:46:28,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:46:28,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 14:46:28,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:28,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:28,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:46:28,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:46:28,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:46:28,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:46:28,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 14:46:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:28,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:29,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:29,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-25 14:46:29,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:46:29,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1127 [2020-09-25 14:46:29,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:29,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:29,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-25 14:46:29,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 14:46:29,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-25 14:46:29,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:46:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:46:30,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950694748] [2020-09-25 14:46:30,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:46:30,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-25 14:46:30,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673946245] [2020-09-25 14:46:30,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-25 14:46:30,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:46:30,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-25 14:46:30,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2020-09-25 14:46:30,518 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 29 states. [2020-09-25 14:46:32,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:46:32,369 INFO L93 Difference]: Finished difference Result 147 states and 155 transitions. [2020-09-25 14:46:32,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-25 14:46:32,370 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 95 [2020-09-25 14:46:32,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:46:32,372 INFO L225 Difference]: With dead ends: 147 [2020-09-25 14:46:32,372 INFO L226 Difference]: Without dead ends: 120 [2020-09-25 14:46:32,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1103, Invalid=3187, Unknown=0, NotChecked=0, Total=4290 [2020-09-25 14:46:32,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-25 14:46:32,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2020-09-25 14:46:32,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-25 14:46:32,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2020-09-25 14:46:32,380 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 95 [2020-09-25 14:46:32,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:46:32,380 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2020-09-25 14:46:32,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-25 14:46:32,380 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2020-09-25 14:46:32,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-09-25 14:46:32,381 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:46:32,381 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:46:32,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 14:46:32,382 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:46:32,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:46:32,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1998958929, now seen corresponding path program 12 times [2020-09-25 14:46:32,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:46:32,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454372705] [2020-09-25 14:46:32,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:46:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:32,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:32,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking...