/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 --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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-eb0fd7c [2020-09-21 12:34:38,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:34:38,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:34:38,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:34:38,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:34:38,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:34:38,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:34:38,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:34:38,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:34:38,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:34:38,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:34:38,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:34:38,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:34:38,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:34:38,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:34:38,111 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:34:38,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:34:38,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:34:38,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:34:38,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:34:38,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:34:38,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:34:38,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:34:38,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:34:38,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:34:38,143 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:34:38,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:34:38,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:34:38,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:34:38,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:34:38,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:34:38,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:34:38,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:34:38,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:34:38,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:34:38,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:34:38,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:34:38,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:34:38,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:34:38,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:34:38,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:34:38,165 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 [2020-09-21 12:34:38,208 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:34:38,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:34:38,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:34:38,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:34:38,211 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:34:38,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:34:38,212 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:34:38,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:34:38,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:34:38,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:34:38,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:34:38,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:34:38,214 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:34:38,214 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:34:38,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:34:38,215 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:34:38,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:34:38,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:34:38,215 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:34:38,215 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:34:38,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:34:38,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:34:38,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:34:38,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:34:38,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:34:38,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:34:38,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:34:38,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:34:38,218 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:34:38,218 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.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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:34:38,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:34:38,740 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:34:38,744 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:34:38,746 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:34:38,746 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:34:38,748 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-21 12:34:38,834 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c219d1e8c/fb59562faf3e445e9f964d14c203f39a/FLAG2aa99e7de [2020-09-21 12:34:39,365 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:34:39,366 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-21 12:34:39,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c219d1e8c/fb59562faf3e445e9f964d14c203f39a/FLAG2aa99e7de [2020-09-21 12:34:39,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c219d1e8c/fb59562faf3e445e9f964d14c203f39a [2020-09-21 12:34:39,731 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:34:39,737 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:34:39,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:34:39,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:34:39,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:34:39,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:34:39" (1/1) ... [2020-09-21 12:34:39,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ef001ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:39, skipping insertion in model container [2020-09-21 12:34:39,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:34:39" (1/1) ... [2020-09-21 12:34:39,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:34:39,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:34:40,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:34:40,033 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:34:40,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:34:40,071 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:34:40,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:40 WrapperNode [2020-09-21 12:34:40,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:34:40,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:34:40,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:34:40,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:34:40,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:40" (1/1) ... [2020-09-21 12:34:40,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:40" (1/1) ... [2020-09-21 12:34:40,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:40" (1/1) ... [2020-09-21 12:34:40,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:40" (1/1) ... [2020-09-21 12:34:40,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:40" (1/1) ... [2020-09-21 12:34:40,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:40" (1/1) ... [2020-09-21 12:34:40,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:40" (1/1) ... [2020-09-21 12:34:40,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:34:40,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:34:40,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:34:40,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:34:40,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:40" (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 [2020-09-21 12:34:40,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:34:40,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:34:40,308 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 12:34:40,308 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-21 12:34:40,308 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:34:40,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:34:40,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 12:34:40,310 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 12:34:40,311 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-09-21 12:34:40,312 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-21 12:34:40,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 12:34:40,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 12:34:40,312 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:34:40,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 12:34:40,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 12:34:40,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 12:34:40,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:34:40,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:34:40,616 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:34:40,619 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-21 12:34:40,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:34:40 BoogieIcfgContainer [2020-09-21 12:34:40,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:34:40,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:34:40,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:34:40,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:34:40,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:34:39" (1/3) ... [2020-09-21 12:34:40,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e397e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:34:40, skipping insertion in model container [2020-09-21 12:34:40,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:34:40" (2/3) ... [2020-09-21 12:34:40,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e397e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:34:40, skipping insertion in model container [2020-09-21 12:34:40,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:34:40" (3/3) ... [2020-09-21 12:34:40,661 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-09-21 12:34:40,688 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:34:40,713 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:34:40,735 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:34:40,763 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:34:40,763 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:34:40,763 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:34:40,764 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:34:40,764 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:34:40,764 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:34:40,764 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:34:40,764 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:34:40,786 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-21 12:34:40,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 12:34:40,792 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:40,794 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] [2020-09-21 12:34:40,794 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:40,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:40,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1059974619, now seen corresponding path program 1 times [2020-09-21 12:34:40,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:40,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991590969] [2020-09-21 12:34:40,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:40,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:41,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:41,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:41,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 12:34:41,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:41,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-09-21 12:34:41,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:41,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:41,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 12:34:41,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:41,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-21 12:34:41,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:41,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:41,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:41,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:41,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:41,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-21 12:34:41,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:41,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:41,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:41,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:41,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:41,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:41,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:41,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:41,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:41,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:34:41,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:41,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-21 12:34:41,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:41,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:41,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:41,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:41,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:34:41,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991590969] [2020-09-21 12:34:41,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:34:41,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 12:34:41,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447937208] [2020-09-21 12:34:41,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 12:34:41,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:41,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 12:34:41,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 12:34:41,579 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-09-21 12:34:41,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:41,742 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-09-21 12:34:41,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:34:41,744 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-09-21 12:34:41,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:41,758 INFO L225 Difference]: With dead ends: 59 [2020-09-21 12:34:41,759 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 12:34:41,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:34:41,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 12:34:41,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-09-21 12:34:41,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-21 12:34:41,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-21 12:34:41,817 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-09-21 12:34:41,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:41,818 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-21 12:34:41,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 12:34:41,818 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-21 12:34:41,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 12:34:41,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:41,820 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] [2020-09-21 12:34:41,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:34:41,820 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:41,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:41,821 INFO L82 PathProgramCache]: Analyzing trace with hash -931069882, now seen corresponding path program 1 times [2020-09-21 12:34:41,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:41,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578036631] [2020-09-21 12:34:41,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:41,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:41,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:42,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:42,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 12:34:42,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:42,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-09-21 12:34:42,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:42,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:34:42,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 12:34:42,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 12:34:42,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:42,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:42,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:42,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:42,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:42,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:42,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 12:34:42,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:42,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:42,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:42,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:42,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:42,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:42,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:42,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:42,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:42,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:34:42,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:42,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-21 12:34:42,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:42,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:42,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:42,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:42,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:34:42,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578036631] [2020-09-21 12:34:42,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:34:42,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:34:42,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048759873] [2020-09-21 12:34:42,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:34:42,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:42,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:34:42,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:34:42,201 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-09-21 12:34:42,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:42,396 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2020-09-21 12:34:42,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:34:42,398 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-09-21 12:34:42,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:42,401 INFO L225 Difference]: With dead ends: 51 [2020-09-21 12:34:42,401 INFO L226 Difference]: Without dead ends: 39 [2020-09-21 12:34:42,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:34:42,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-21 12:34:42,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2020-09-21 12:34:42,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-21 12:34:42,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-09-21 12:34:42,442 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-09-21 12:34:42,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:42,446 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-09-21 12:34:42,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:34:42,446 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-09-21 12:34:42,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 12:34:42,447 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:42,448 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] [2020-09-21 12:34:42,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:34:42,448 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:42,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:42,449 INFO L82 PathProgramCache]: Analyzing trace with hash 387293505, now seen corresponding path program 1 times [2020-09-21 12:34:42,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:42,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939791371] [2020-09-21 12:34:42,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:42,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:42,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:42,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:42,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:42,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:34:42,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:34:42,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 505 [2020-09-21 12:34:42,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:42,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:34:42,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:34:42,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:34:42,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:43,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:43,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:43,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:43,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:43,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:43,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:34:43,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:43,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:43,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:43,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:43,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:43,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:43,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:43,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:43,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:43,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:34:43,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:43,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 12:34:43,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:43,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:43,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:43,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:43,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:34:43,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939791371] [2020-09-21 12:34:43,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:34:43,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 12:34:43,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139987702] [2020-09-21 12:34:43,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 12:34:43,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:43,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 12:34:43,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 12:34:43,058 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2020-09-21 12:34:43,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:43,173 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-09-21 12:34:43,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 12:34:43,174 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-09-21 12:34:43,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:43,176 INFO L225 Difference]: With dead ends: 50 [2020-09-21 12:34:43,176 INFO L226 Difference]: Without dead ends: 32 [2020-09-21 12:34:43,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:34:43,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-21 12:34:43,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-09-21 12:34:43,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-21 12:34:43,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-09-21 12:34:43,185 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2020-09-21 12:34:43,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:43,185 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-09-21 12:34:43,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 12:34:43,186 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-09-21 12:34:43,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 12:34:43,187 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:43,187 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] [2020-09-21 12:34:43,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:34:43,188 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:43,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:43,188 INFO L82 PathProgramCache]: Analyzing trace with hash -5733505, now seen corresponding path program 1 times [2020-09-21 12:34:43,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:43,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347442635] [2020-09-21 12:34:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:43,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:43,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:43,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:43,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:43,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:34:43,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:34:43,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 652 [2020-09-21 12:34:43,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:43,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:34:43,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:34:43,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 12:34:43,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:43,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:43,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:43,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:43,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:43,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:43,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:34:43,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:43,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:43,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:43,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:43,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:43,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:43,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:43,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:43,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 12:34:43,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:43,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-21 12:34:43,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:43,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:34:43,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:34:43,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:34:43,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:34:43,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347442635] [2020-09-21 12:34:43,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:34:43,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:34:43,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059288119] [2020-09-21 12:34:43,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:34:43,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:43,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:34:43,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:34:43,944 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2020-09-21 12:34:44,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:44,103 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-09-21 12:34:44,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:34:44,104 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-09-21 12:34:44,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:44,105 INFO L225 Difference]: With dead ends: 50 [2020-09-21 12:34:44,105 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 12:34:44,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:34:44,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 12:34:44,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-09-21 12:34:44,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 12:34:44,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-09-21 12:34:44,113 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2020-09-21 12:34:44,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:44,113 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-09-21 12:34:44,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:34:44,114 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-09-21 12:34:44,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 12:34:44,115 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:44,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:34:44,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:34:44,115 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:44,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:44,116 INFO L82 PathProgramCache]: Analyzing trace with hash 20292413, now seen corresponding path program 1 times [2020-09-21 12:34:44,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:44,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925704035] [2020-09-21 12:34:44,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:44,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:44,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:44,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:44,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:45,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:45,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 12:34:45,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:34:45,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-09-21 12:34:45,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:45,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 12:34:45,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:34:45,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 12:34:45,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:45,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:45,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:45,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:45,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:45,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:45,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:34:45,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:45,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:45,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:45,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:45,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:45,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:45,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:45,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:45,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:45,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:34:45,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:45,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-09-21 12:34:45,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:45,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:45,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:45,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:45,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:34:45,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925704035] [2020-09-21 12:34:45,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:45,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 12:34:45,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755684290] [2020-09-21 12:34:45,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:34:45,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:45,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:34:45,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:34:45,281 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 6 states. [2020-09-21 12:34:45,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:45,423 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-09-21 12:34:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 12:34:45,424 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-09-21 12:34:45,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:45,426 INFO L225 Difference]: With dead ends: 57 [2020-09-21 12:34:45,426 INFO L226 Difference]: Without dead ends: 45 [2020-09-21 12:34:45,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:34:45,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-21 12:34:45,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2020-09-21 12:34:45,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 12:34:45,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-09-21 12:34:45,434 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 25 [2020-09-21 12:34:45,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:45,434 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-09-21 12:34:45,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:34:45,434 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-09-21 12:34:45,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 12:34:45,435 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:45,435 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:34:45,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:34:45,436 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:45,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:45,437 INFO L82 PathProgramCache]: Analyzing trace with hash -460789464, now seen corresponding path program 2 times [2020-09-21 12:34:45,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:45,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975121350] [2020-09-21 12:34:45,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:45,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:45,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:45,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:46,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 12:34:46,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:34:46,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-09-21 12:34:46,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:46,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:34:46,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:34:46,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:34:46,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:46,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:46,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:46,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:46,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:46,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:34:46,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:46,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:46,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:46,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:46,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:46,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:46,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:46,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:34:46,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:46,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-21 12:34:46,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:46,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:46,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:46,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:46,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 12:34:46,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975121350] [2020-09-21 12:34:46,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:46,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:34:46,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451754569] [2020-09-21 12:34:46,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:34:46,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:46,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:34:46,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:34:46,624 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 7 states. [2020-09-21 12:34:46,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:46,835 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-09-21 12:34:46,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:34:46,836 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-09-21 12:34:46,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:46,837 INFO L225 Difference]: With dead ends: 65 [2020-09-21 12:34:46,838 INFO L226 Difference]: Without dead ends: 53 [2020-09-21 12:34:46,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:34:46,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-21 12:34:46,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-09-21 12:34:46,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 12:34:46,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-09-21 12:34:46,846 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2020-09-21 12:34:46,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:46,846 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-09-21 12:34:46,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:34:46,847 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-09-21 12:34:46,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 12:34:46,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:46,848 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 12:34:46,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:34:46,848 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:46,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:46,849 INFO L82 PathProgramCache]: Analyzing trace with hash -65120419, now seen corresponding path program 3 times [2020-09-21 12:34:46,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:46,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075676755] [2020-09-21 12:34:46,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:46,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:46,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:47,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:47,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-21 12:34:47,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:34:47,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-21 12:34:47,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:47,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:34:47,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:34:47,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 12:34:47,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:47,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:47,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:47,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:47,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:47,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:47,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:34:47,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:47,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:47,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:47,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:47,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:47,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:47,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:47,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:47,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-21 12:34:47,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:47,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-21 12:34:47,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:47,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 12:34:47,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:34:47,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:34:47,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-21 12:34:48,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075676755] [2020-09-21 12:34:48,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:48,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 12:34:48,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036298738] [2020-09-21 12:34:48,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 12:34:48,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:48,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 12:34:48,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-21 12:34:48,089 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 7 states. [2020-09-21 12:34:48,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:48,261 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-09-21 12:34:48,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 12:34:48,261 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-09-21 12:34:48,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:48,262 INFO L225 Difference]: With dead ends: 64 [2020-09-21 12:34:48,263 INFO L226 Difference]: Without dead ends: 39 [2020-09-21 12:34:48,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:34:48,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-21 12:34:48,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-09-21 12:34:48,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-21 12:34:48,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-09-21 12:34:48,269 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 31 [2020-09-21 12:34:48,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:48,270 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-09-21 12:34:48,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 12:34:48,270 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-09-21 12:34:48,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 12:34:48,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:48,271 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:34:48,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:34:48,272 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:48,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:48,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1961285915, now seen corresponding path program 4 times [2020-09-21 12:34:48,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:48,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812576143] [2020-09-21 12:34:48,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:48,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:48,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:48,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:48,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:49,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:49,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-21 12:34:49,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:34:49,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005 [2020-09-21 12:34:49,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:49,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:34:49,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:34:49,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 12:34:49,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:49,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:49,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:49,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:49,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:49,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:49,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:34:49,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:49,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:49,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:49,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:49,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:49,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:49,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:49,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:49,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-21 12:34:49,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:49,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-21 12:34:49,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:49,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:34:49,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:34:49,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:34:49,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-21 12:34:49,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812576143] [2020-09-21 12:34:49,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:49,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:34:49,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764533851] [2020-09-21 12:34:49,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:34:49,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:49,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:34:49,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:34:49,461 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 8 states. [2020-09-21 12:34:49,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:49,606 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-09-21 12:34:49,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:34:49,607 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-21 12:34:49,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:49,608 INFO L225 Difference]: With dead ends: 66 [2020-09-21 12:34:49,608 INFO L226 Difference]: Without dead ends: 41 [2020-09-21 12:34:49,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:34:49,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-21 12:34:49,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-09-21 12:34:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 12:34:49,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-09-21 12:34:49,615 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 33 [2020-09-21 12:34:49,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:49,615 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-09-21 12:34:49,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:34:49,616 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-09-21 12:34:49,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-21 12:34:49,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:49,617 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 12:34:49,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:34:49,617 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:49,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:49,618 INFO L82 PathProgramCache]: Analyzing trace with hash -577379495, now seen corresponding path program 5 times [2020-09-21 12:34:49,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:49,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262578257] [2020-09-21 12:34:49,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:49,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:49,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:49,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:49,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:50,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:50,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:50,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-21 12:34:50,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:34:50,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-09-21 12:34:50,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:50,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:34:50,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-21 12:34:50,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:34:50,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:50,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:50,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:50,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:50,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:50,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:50,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:50,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:34:50,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:50,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:50,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:50,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:50,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:50,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:50,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:50,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:50,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:50,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-21 12:34:50,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:50,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-09-21 12:34:50,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:50,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:50,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:50,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:50,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-21 12:34:50,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262578257] [2020-09-21 12:34:50,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:50,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 12:34:50,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795248872] [2020-09-21 12:34:50,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 12:34:50,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:50,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 12:34:50,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:34:50,903 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 8 states. [2020-09-21 12:34:51,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:51,061 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2020-09-21 12:34:51,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 12:34:51,062 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-09-21 12:34:51,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:51,063 INFO L225 Difference]: With dead ends: 77 [2020-09-21 12:34:51,063 INFO L226 Difference]: Without dead ends: 65 [2020-09-21 12:34:51,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:34:51,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-21 12:34:51,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2020-09-21 12:34:51,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-21 12:34:51,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-09-21 12:34:51,071 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 35 [2020-09-21 12:34:51,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:51,071 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-09-21 12:34:51,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 12:34:51,071 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-09-21 12:34:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-21 12:34:51,072 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:51,073 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:34:51,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 12:34:51,073 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:51,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:51,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1229808524, now seen corresponding path program 6 times [2020-09-21 12:34:51,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:51,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24304855] [2020-09-21 12:34:51,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:51,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:51,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:51,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:51,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:51,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:52,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:52,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-21 12:34:52,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:34:52,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1009 [2020-09-21 12:34:52,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:52,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:34:52,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:34:52,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 12:34:52,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:52,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:52,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:52,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:52,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:52,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:52,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:34:52,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:52,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:52,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:52,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:52,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:52,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:52,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:52,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:52,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-21 12:34:52,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:52,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-09-21 12:34:52,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:52,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:34:52,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:34:52,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:34:52,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:52,525 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-21 12:34:52,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24304855] [2020-09-21 12:34:52,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:52,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 12:34:52,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600922531] [2020-09-21 12:34:52,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 12:34:52,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:52,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 12:34:52,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:34:52,528 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 9 states. [2020-09-21 12:34:52,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:52,771 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-09-21 12:34:52,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:34:52,772 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-09-21 12:34:52,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:52,773 INFO L225 Difference]: With dead ends: 74 [2020-09-21 12:34:52,774 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 12:34:52,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:34:52,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 12:34:52,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-09-21 12:34:52,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-21 12:34:52,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-09-21 12:34:52,792 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 38 [2020-09-21 12:34:52,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:52,796 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-09-21 12:34:52,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 12:34:52,796 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-09-21 12:34:52,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-21 12:34:52,797 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:52,797 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 12:34:52,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 12:34:52,798 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:52,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:52,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1883312142, now seen corresponding path program 7 times [2020-09-21 12:34:52,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:52,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546259638] [2020-09-21 12:34:52,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:52,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:52,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:52,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:53,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:53,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:53,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:53,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-21 12:34:53,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:34:53,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-21 12:34:53,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:53,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:34:53,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-21 12:34:53,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 12:34:53,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:53,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:53,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:53,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:53,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:53,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:53,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:34:53,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:53,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:53,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:53,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:53,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:53,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:53,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:53,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:54,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:54,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 12:34:54,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:54,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-09-21 12:34:54,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:54,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:54,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:54,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:54,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 33 [2020-09-21 12:34:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-21 12:34:54,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546259638] [2020-09-21 12:34:54,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:54,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 12:34:54,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671781378] [2020-09-21 12:34:54,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 12:34:54,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:54,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 12:34:54,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-21 12:34:54,204 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 9 states. [2020-09-21 12:34:54,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:54,444 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2020-09-21 12:34:54,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 12:34:54,445 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-09-21 12:34:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:54,446 INFO L225 Difference]: With dead ends: 87 [2020-09-21 12:34:54,446 INFO L226 Difference]: Without dead ends: 75 [2020-09-21 12:34:54,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:34:54,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-21 12:34:54,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 48. [2020-09-21 12:34:54,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-21 12:34:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-09-21 12:34:54,454 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 40 [2020-09-21 12:34:54,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:54,454 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-09-21 12:34:54,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 12:34:54,455 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-09-21 12:34:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-21 12:34:54,455 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:54,456 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:34:54,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 12:34:54,456 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:54,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:54,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1192558263, now seen corresponding path program 8 times [2020-09-21 12:34:54,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:54,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001083705] [2020-09-21 12:34:54,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:54,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:54,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:54,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:54,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:55,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:55,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:55,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-21 12:34:55,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:34:55,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-09-21 12:34:55,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:55,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:34:55,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:34:55,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:34:55,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:55,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:55,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:55,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:55,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:55,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:55,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:34:55,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:55,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:55,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:55,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:55,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:55,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:55,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:55,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:55,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-21 12:34:55,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:55,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-09-21 12:34:55,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:55,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:34:55,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:34:55,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 12:34:55,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-21 12:34:55,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001083705] [2020-09-21 12:34:55,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:55,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:34:55,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693170291] [2020-09-21 12:34:55,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:34:55,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:55,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:34:55,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:34:55,731 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 10 states. [2020-09-21 12:34:55,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:55,900 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-09-21 12:34:55,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:34:55,900 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-09-21 12:34:55,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:55,901 INFO L225 Difference]: With dead ends: 82 [2020-09-21 12:34:55,901 INFO L226 Difference]: Without dead ends: 51 [2020-09-21 12:34:55,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:34:55,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-21 12:34:55,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-09-21 12:34:55,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-21 12:34:55,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-09-21 12:34:55,908 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 43 [2020-09-21 12:34:55,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:55,908 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-09-21 12:34:55,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:34:55,909 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-09-21 12:34:55,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 12:34:55,911 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:55,911 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 12:34:55,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 12:34:55,911 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:55,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:55,912 INFO L82 PathProgramCache]: Analyzing trace with hash -547171467, now seen corresponding path program 9 times [2020-09-21 12:34:55,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:55,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484692472] [2020-09-21 12:34:55,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:55,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:55,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:56,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:56,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:56,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-21 12:34:56,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:34:56,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-21 12:34:56,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:56,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 12:34:56,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-21 12:34:56,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 12:34:56,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:57,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:57,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:57,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:57,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:57,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:57,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:57,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:34:57,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:57,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:57,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:57,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:57,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:57,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:57,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:57,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:57,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:57,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:34:57,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:57,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-09-21 12:34:57,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:57,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:57,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:57,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:57,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-21 12:34:57,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484692472] [2020-09-21 12:34:57,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:57,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 12:34:57,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960495998] [2020-09-21 12:34:57,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 12:34:57,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:57,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 12:34:57,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-09-21 12:34:57,233 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 10 states. [2020-09-21 12:34:57,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:57,457 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2020-09-21 12:34:57,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 12:34:57,458 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-09-21 12:34:57,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:57,459 INFO L225 Difference]: With dead ends: 97 [2020-09-21 12:34:57,460 INFO L226 Difference]: Without dead ends: 85 [2020-09-21 12:34:57,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:34:57,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-21 12:34:57,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 53. [2020-09-21 12:34:57,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-21 12:34:57,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-09-21 12:34:57,466 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 45 [2020-09-21 12:34:57,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:57,466 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-09-21 12:34:57,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 12:34:57,467 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-09-21 12:34:57,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-21 12:34:57,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:57,468 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:34:57,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 12:34:57,468 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:57,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:57,468 INFO L82 PathProgramCache]: Analyzing trace with hash -785961488, now seen corresponding path program 10 times [2020-09-21 12:34:57,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:57,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709607666] [2020-09-21 12:34:57,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:57,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:57,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:58,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:58,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:58,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:58,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:58,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-21 12:34:58,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:34:58,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1104 [2020-09-21 12:34:58,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:58,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:34:58,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-21 12:34:58,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 12:34:58,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:34:58,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:34:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:58,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:58,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:58,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:34:58,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:34:58,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:34:58,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:58,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:58,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:58,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:58,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:58,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:34:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:58,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:58,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:58,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:34:58,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:34:58,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:34:58,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-09-21 12:34:58,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:34:58,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:34:58,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:34:58,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:34:58,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:34:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-21 12:34:58,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709607666] [2020-09-21 12:34:58,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:34:58,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 12:34:58,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652601748] [2020-09-21 12:34:58,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 12:34:58,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:34:58,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 12:34:58,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:34:58,947 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 11 states. [2020-09-21 12:34:59,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:34:59,182 INFO L93 Difference]: Finished difference Result 105 states and 124 transitions. [2020-09-21 12:34:59,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 12:34:59,183 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-09-21 12:34:59,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:34:59,184 INFO L225 Difference]: With dead ends: 105 [2020-09-21 12:34:59,184 INFO L226 Difference]: Without dead ends: 93 [2020-09-21 12:34:59,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:34:59,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-21 12:34:59,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2020-09-21 12:34:59,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-21 12:34:59,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-09-21 12:34:59,191 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 48 [2020-09-21 12:34:59,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:34:59,192 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-09-21 12:34:59,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 12:34:59,192 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-09-21 12:34:59,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-21 12:34:59,192 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:34:59,193 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:34:59,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 12:34:59,193 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:34:59,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:34:59,194 INFO L82 PathProgramCache]: Analyzing trace with hash -2113634923, now seen corresponding path program 11 times [2020-09-21 12:34:59,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:34:59,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367354077] [2020-09-21 12:34:59,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:34:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:34:59,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:59,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:59,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:34:59,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:00,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:00,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:00,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-21 12:35:00,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:35:00,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1086 [2020-09-21 12:35:00,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:00,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:35:00,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:35:00,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 12:35:00,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:00,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:00,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:00,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:00,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:00,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:00,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:00,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:35:00,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:00,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:00,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:00,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:00,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:00,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:35:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:00,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:00,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:00,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:35:00,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:00,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-09-21 12:35:00,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:00,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 12:35:00,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:35:00,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:35:00,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-21 12:35:00,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367354077] [2020-09-21 12:35:00,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:00,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 12:35:00,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301894854] [2020-09-21 12:35:00,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 12:35:00,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:00,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 12:35:00,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-21 12:35:00,781 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 11 states. [2020-09-21 12:35:00,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:00,973 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-09-21 12:35:00,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:35:00,974 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-09-21 12:35:00,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:00,975 INFO L225 Difference]: With dead ends: 96 [2020-09-21 12:35:00,975 INFO L226 Difference]: Without dead ends: 59 [2020-09-21 12:35:00,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-09-21 12:35:00,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-21 12:35:00,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-09-21 12:35:00,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-21 12:35:00,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-09-21 12:35:00,986 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 51 [2020-09-21 12:35:00,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:00,987 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-09-21 12:35:00,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 12:35:00,987 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-09-21 12:35:00,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-21 12:35:00,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:00,988 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:00,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 12:35:00,988 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:00,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:00,989 INFO L82 PathProgramCache]: Analyzing trace with hash 872985683, now seen corresponding path program 12 times [2020-09-21 12:35:00,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:00,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676282392] [2020-09-21 12:35:00,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:01,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:01,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:01,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:01,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:02,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:02,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-21 12:35:02,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:35:02,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-09-21 12:35:02,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:02,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:35:02,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:35:02,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 12:35:02,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:02,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:02,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:02,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:02,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:02,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:02,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:35:02,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:02,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:02,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:02,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:02,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:02,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:35:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:02,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:02,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:02,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 12:35:02,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:02,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-09-21 12:35:02,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:02,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:35:02,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:35:02,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 12:35:02,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-21 12:35:02,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676282392] [2020-09-21 12:35:02,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:02,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 12:35:02,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156370522] [2020-09-21 12:35:02,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 12:35:02,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:02,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 12:35:02,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:35:02,576 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 12 states. [2020-09-21 12:35:02,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:02,735 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-09-21 12:35:02,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 12:35:02,736 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-09-21 12:35:02,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:02,737 INFO L225 Difference]: With dead ends: 98 [2020-09-21 12:35:02,737 INFO L226 Difference]: Without dead ends: 61 [2020-09-21 12:35:02,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-21 12:35:02,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-21 12:35:02,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-09-21 12:35:02,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-21 12:35:02,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-09-21 12:35:02,745 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 53 [2020-09-21 12:35:02,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:02,745 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-09-21 12:35:02,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 12:35:02,745 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-09-21 12:35:02,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-21 12:35:02,746 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:02,746 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 12:35:02,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 12:35:02,748 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:02,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:02,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1977234321, now seen corresponding path program 13 times [2020-09-21 12:35:02,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:02,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030981625] [2020-09-21 12:35:02,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:02,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:02,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:02,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:03,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:03,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-21 12:35:03,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:35:03,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005 [2020-09-21 12:35:03,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:03,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:35:03,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-21 12:35:03,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 12:35:03,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:03,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:03,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:03,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:03,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:03,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:03,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:35:03,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:03,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:03,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:03,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:03,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:03,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:35:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:03,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:03,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:04,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:04,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-21 12:35:04,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:04,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-09-21 12:35:04,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:04,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:04,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:04,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:04,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:04,245 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-09-21 12:35:04,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030981625] [2020-09-21 12:35:04,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:04,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 12:35:04,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870555] [2020-09-21 12:35:04,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 12:35:04,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:04,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 12:35:04,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:35:04,247 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 12 states. [2020-09-21 12:35:04,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:04,455 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2020-09-21 12:35:04,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:35:04,456 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-09-21 12:35:04,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:04,458 INFO L225 Difference]: With dead ends: 117 [2020-09-21 12:35:04,458 INFO L226 Difference]: Without dead ends: 105 [2020-09-21 12:35:04,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:35:04,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-21 12:35:04,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 63. [2020-09-21 12:35:04,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-21 12:35:04,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-09-21 12:35:04,464 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 55 [2020-09-21 12:35:04,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:04,465 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-09-21 12:35:04,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 12:35:04,465 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-09-21 12:35:04,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-21 12:35:04,465 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:04,466 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:04,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 12:35:04,466 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:04,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:04,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1090484140, now seen corresponding path program 14 times [2020-09-21 12:35:04,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:04,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036344495] [2020-09-21 12:35:04,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:04,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:04,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:04,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:04,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:05,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:05,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:05,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-21 12:35:05,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:35:05,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1047 [2020-09-21 12:35:05,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:05,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 12:35:05,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-21 12:35:05,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-21 12:35:05,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:05,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:05,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:05,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:05,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:05,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:05,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:35:05,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:05,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:05,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:05,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:05,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:05,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:35:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:05,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:05,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:05,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:05,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-21 12:35:05,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:05,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-09-21 12:35:05,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:05,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:05,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:05,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:05,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:35:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-09-21 12:35:05,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036344495] [2020-09-21 12:35:05,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:05,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 12:35:05,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641345464] [2020-09-21 12:35:05,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 12:35:05,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:05,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 12:35:05,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:35:05,996 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 13 states. [2020-09-21 12:35:06,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:06,290 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2020-09-21 12:35:06,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 12:35:06,291 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2020-09-21 12:35:06,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:06,292 INFO L225 Difference]: With dead ends: 125 [2020-09-21 12:35:06,293 INFO L226 Difference]: Without dead ends: 113 [2020-09-21 12:35:06,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-21 12:35:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-21 12:35:06,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-09-21 12:35:06,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-21 12:35:06,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-09-21 12:35:06,308 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 58 [2020-09-21 12:35:06,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:06,309 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-09-21 12:35:06,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 12:35:06,309 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-09-21 12:35:06,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-21 12:35:06,310 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:06,310 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:06,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 12:35:06,311 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:06,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:06,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1117935793, now seen corresponding path program 15 times [2020-09-21 12:35:06,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:06,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091612395] [2020-09-21 12:35:06,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:06,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:06,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:06,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:06,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:07,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:07,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:07,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-21 12:35:07,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-21 12:35:07,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-09-21 12:35:07,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:07,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 12:35:07,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:35:07,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 12:35:07,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:07,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:07,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:07,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:07,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:07,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:07,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:35:07,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:07,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:07,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:07,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:07,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:07,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:35:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:07,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:07,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:07,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-21 12:35:07,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:07,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-09-21 12:35:07,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:07,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 12:35:07,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-21 12:35:07,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 12:35:07,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-09-21 12:35:07,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091612395] [2020-09-21 12:35:07,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:07,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 12:35:07,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679047605] [2020-09-21 12:35:07,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 12:35:07,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:07,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 12:35:07,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-21 12:35:07,836 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 13 states. [2020-09-21 12:35:08,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:08,050 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-09-21 12:35:08,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 12:35:08,050 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-09-21 12:35:08,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:08,052 INFO L225 Difference]: With dead ends: 112 [2020-09-21 12:35:08,052 INFO L226 Difference]: Without dead ends: 69 [2020-09-21 12:35:08,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-21 12:35:08,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-21 12:35:08,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-09-21 12:35:08,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-21 12:35:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2020-09-21 12:35:08,064 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 61 [2020-09-21 12:35:08,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:08,064 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2020-09-21 12:35:08,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 12:35:08,065 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2020-09-21 12:35:08,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-21 12:35:08,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:08,069 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:08,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 12:35:08,072 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:08,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:08,073 INFO L82 PathProgramCache]: Analyzing trace with hash -15222289, now seen corresponding path program 16 times [2020-09-21 12:35:08,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:08,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963647302] [2020-09-21 12:35:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:08,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:08,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:08,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:08,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:09,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:09,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-21 12:35:09,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:35:09,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1014 [2020-09-21 12:35:09,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:09,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 12:35:09,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-09-21 12:35:09,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-21 12:35:09,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:09,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:09,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:09,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:09,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:09,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:09,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 12:35:09,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:09,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:09,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:09,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:09,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:09,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:35:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:09,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:09,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:09,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:09,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 12:35:09,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:09,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-09-21 12:35:09,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:09,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:09,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:09,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:09,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-09-21 12:35:09,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963647302] [2020-09-21 12:35:09,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:09,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 12:35:09,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348750932] [2020-09-21 12:35:09,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 12:35:09,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:09,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 12:35:09,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-09-21 12:35:09,642 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 14 states. [2020-09-21 12:35:09,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:09,929 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2020-09-21 12:35:09,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 12:35:09,930 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-09-21 12:35:09,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:09,931 INFO L225 Difference]: With dead ends: 135 [2020-09-21 12:35:09,932 INFO L226 Difference]: Without dead ends: 123 [2020-09-21 12:35:09,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-09-21 12:35:09,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-21 12:35:09,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 71. [2020-09-21 12:35:09,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-21 12:35:09,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-09-21 12:35:09,945 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 63 [2020-09-21 12:35:09,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:09,946 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-09-21 12:35:09,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 12:35:09,946 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-09-21 12:35:09,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-21 12:35:09,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:35:09,947 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:35:09,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 12:35:09,947 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:35:09,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:35:09,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1917321930, now seen corresponding path program 17 times [2020-09-21 12:35:09,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:35:09,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506120553] [2020-09-21 12:35:09,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:35:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:09,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:10,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:10,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:10,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:10,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:10,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-21 12:35:10,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:35:10,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1015 [2020-09-21 12:35:10,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:10,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 12:35:10,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:35:10,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-21 12:35:10,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:11,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:35:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:11,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:11,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:11,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 12:35:11,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:35:11,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:35:11,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:11,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:35:11,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:11,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:35:11,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:11,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 12:35:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:35:11,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:11,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:35:11,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:35:11,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 12:35:11,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:35:11,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 723 [2020-09-21 12:35:11,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:35:11,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 12:35:11,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:35:11,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-21 12:35:11,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:35:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2020-09-21 12:35:12,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506120553] [2020-09-21 12:35:12,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 12:35:12,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 12:35:12,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630713433] [2020-09-21 12:35:12,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 12:35:12,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:35:12,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 12:35:12,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-09-21 12:35:12,002 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 12 states. [2020-09-21 12:35:12,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:35:12,315 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2020-09-21 12:35:12,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 12:35:12,316 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-09-21 12:35:12,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:35:12,316 INFO L225 Difference]: With dead ends: 71 [2020-09-21 12:35:12,316 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 12:35:12,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-09-21 12:35:12,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 12:35:12,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 12:35:12,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 12:35:12,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 12:35:12,318 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2020-09-21 12:35:12,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:35:12,318 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 12:35:12,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 12:35:12,318 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 12:35:12,319 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 12:35:12,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 12:35:12,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 12:35:12,626 INFO L264 CegarLoopResult]: At program point initENTRY(lines 9 16) the Hoare annotation is: (and (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|) (= |old(#length)| |#length|) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (= |old(#valid)| |#valid|)) [2020-09-21 12:35:12,626 INFO L268 CegarLoopResult]: For program point initEXIT(lines 9 16) no Hoare annotation was computed. [2020-09-21 12:35:12,626 INFO L268 CegarLoopResult]: For program point L12-2(lines 12 15) no Hoare annotation was computed. [2020-09-21 12:35:12,629 INFO L264 CegarLoopResult]: At program point L12-3(lines 12 15) the Hoare annotation is: (let ((.cse0 (= init_~a.offset |init_#in~a.offset|)) (.cse3 (<= |init_#in~size| init_~size)) (.cse5 (= init_~a.base |init_#in~a.base|)) (.cse4 (<= init_~size |init_#in~size|))) (or (let ((.cse1 (* 4 init_~i~0)) (.cse2 (* 4 init_~size))) (and .cse0 (<= .cse1 .cse2) .cse3 (or (< .cse1 .cse2) (not (= (select (select |#memory_$Pointer$.base| |init_#in~a.base|) (+ (* |init_#in~size| 4) |init_#in~a.offset| (- 4))) 0))) .cse4 .cse5)) (and .cse0 (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|) (<= (+ |init_#in~size| init_~i~0) init_~size) (= |old(#length)| |#length|) .cse3 .cse5 .cse4 (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (= |old(#valid)| |#valid|)))) [2020-09-21 12:35:12,629 INFO L268 CegarLoopResult]: For program point L12-4(lines 9 16) no Hoare annotation was computed. [2020-09-21 12:35:12,629 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-21 12:35:12,629 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-21 12:35:12,629 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:35:12,629 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:35:12,629 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 12:35:12,630 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 12:35:12,630 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 12:35:12,630 INFO L268 CegarLoopResult]: For program point L33(lines 33 34) no Hoare annotation was computed. [2020-09-21 12:35:12,630 INFO L268 CegarLoopResult]: For program point L31-2(lines 31 35) no Hoare annotation was computed. [2020-09-21 12:35:12,630 INFO L264 CegarLoopResult]: At program point L31-3(lines 31 35) the Hoare annotation is: (<= 1 main_~flag~0) [2020-09-21 12:35:12,630 INFO L268 CegarLoopResult]: For program point L31-4(lines 31 35) no Hoare annotation was computed. [2020-09-21 12:35:12,630 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 37) no Hoare annotation was computed. [2020-09-21 12:35:12,631 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-09-21 12:35:12,631 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-09-21 12:35:12,631 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 37) no Hoare annotation was computed. [2020-09-21 12:35:12,631 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: false [2020-09-21 12:35:12,631 INFO L268 CegarLoopResult]: For program point L34-1(line 34) no Hoare annotation was computed. [2020-09-21 12:35:12,631 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 17 37) the Hoare annotation is: (and (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|) (= |old(#length)| |#length|) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (= |old(#valid)| |#valid|)) [2020-09-21 12:35:12,631 INFO L268 CegarLoopResult]: For program point L26(lines 26 29) no Hoare annotation was computed. [2020-09-21 12:35:12,631 INFO L268 CegarLoopResult]: For program point L24-2(lines 24 30) no Hoare annotation was computed. [2020-09-21 12:35:12,632 INFO L264 CegarLoopResult]: At program point L24-3(lines 24 30) the Hoare annotation is: (or (<= 1 main_~flag~0) (and (not (= (select (select |#memory_$Pointer$.base| |main_~#a~0.base|) (+ |main_~#a~0.offset| 3999996)) 0)) (<= main_~i~1 999999))) [2020-09-21 12:35:12,632 INFO L268 CegarLoopResult]: For program point L24-4(lines 24 30) no Hoare annotation was computed. [2020-09-21 12:35:12,632 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-09-21 12:35:12,632 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-09-21 12:35:12,632 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-09-21 12:35:12,632 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-09-21 12:35:12,632 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-09-21 12:35:12,632 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-09-21 12:35:12,655 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:12,656 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,657 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:12,659 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,665 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:12,667 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-21 12:35:12,668 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-21 12:35:12,668 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:12,668 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:12,669 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,669 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,669 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,669 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-09-21 12:35:12,670 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-09-21 12:35:12,670 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,670 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,673 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:12,673 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-21 12:35:12,674 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-21 12:35:12,674 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:12,674 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:12,675 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,675 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,675 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,675 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-09-21 12:35:12,676 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-09-21 12:35:12,676 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,676 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:35:12 BoogieIcfgContainer [2020-09-21 12:35:12,684 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:35:12,687 INFO L168 Benchmark]: Toolchain (without parser) took 32953.04 ms. Allocated memory was 139.5 MB in the beginning and 442.5 MB in the end (delta: 303.0 MB). Free memory was 101.1 MB in the beginning and 183.2 MB in the end (delta: -82.1 MB). Peak memory consumption was 220.9 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:12,688 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 12:35:12,689 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.44 ms. Allocated memory is still 139.5 MB. Free memory was 100.5 MB in the beginning and 89.8 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:12,690 INFO L168 Benchmark]: Boogie Preprocessor took 150.32 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 89.8 MB in the beginning and 180.2 MB in the end (delta: -90.4 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:12,690 INFO L168 Benchmark]: RCFGBuilder took 402.02 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 163.5 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:12,691 INFO L168 Benchmark]: TraceAbstraction took 32053.44 ms. Allocated memory was 202.9 MB in the beginning and 442.5 MB in the end (delta: 239.6 MB). Free memory was 162.9 MB in the beginning and 183.2 MB in the end (delta: -20.3 MB). Peak memory consumption was 219.3 MB. Max. memory is 7.1 GB. [2020-09-21 12:35:12,694 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 334.44 ms. Allocated memory is still 139.5 MB. Free memory was 100.5 MB in the beginning and 89.8 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 150.32 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 89.8 MB in the beginning and 180.2 MB in the end (delta: -90.4 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 402.02 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 163.5 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 32053.44 ms. Allocated memory was 202.9 MB in the beginning and 442.5 MB in the end (delta: 239.6 MB). Free memory was 162.9 MB in the beginning and 183.2 MB in the end (delta: -20.3 MB). Peak memory consumption was 219.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #length - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_$Pointer$ * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: 1 <= flag - InvariantResult [Line: 24]: Loop Invariant [2020-09-21 12:35:12,702 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:12,702 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,703 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:12,703 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ Derived loop invariant: 1 <= flag || (!(#memory_$Pointer$[a][a + 3999996] == 0) && i <= 999999) - InvariantResult [Line: 12]: Loop Invariant [2020-09-21 12:35:12,703 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:12,704 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-21 12:35:12,704 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-21 12:35:12,704 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:12,704 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:12,705 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,705 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,705 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,705 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-09-21 12:35:12,705 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-09-21 12:35:12,706 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,706 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,706 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:12,707 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-21 12:35:12,707 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2020-09-21 12:35:12,707 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:12,707 WARN L417 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2020-09-21 12:35:12,708 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,708 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,708 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,708 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-09-21 12:35:12,708 WARN L1295 BoogieBacktranslator]: unknown boogie variable #length [2020-09-21 12:35:12,709 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ [2020-09-21 12:35:12,709 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_$Pointer$ Derived loop invariant: (((((a == a && 4 * i <= 4 * size) && \old(size) <= size) && (4 * i < 4 * size || !(#memory_$Pointer$[a][\old(size) * 4 + a + -4] == 0))) && size <= \old(size)) && a == a) || ((((((((a == a && #memory_$Pointer$ == \old(#memory_$Pointer$)) && \old(size) + i <= size) && \old(unknown-#length-unknown) == unknown-#length-unknown) && \old(size) <= size) && a == a) && size <= \old(size)) && #memory_$Pointer$ == \old(#memory_$Pointer$)) && \old(\valid) == \valid) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 31.5s, OverallIterations: 21, TraceHistogramMax: 10, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 568 SDtfs, 690 SDslu, 1672 SDs, 0 SdLazy, 2114 SolverSat, 357 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 290 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 312 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 31 PreInvPairs, 52 NumberOfFragments, 134 HoareAnnotationTreeSize, 31 FomulaSimplifications, 579 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 59 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 26.1s InterpolantComputationTime, 859 NumberOfCodeBlocks, 859 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 838 ConstructedInterpolants, 0 QuantifiedInterpolants, 138207 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 4 PerfectInterpolantSequences, 745/1333 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...