/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 01:08:35,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 01:08:35,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 01:08:35,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 01:08:35,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 01:08:35,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 01:08:35,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 01:08:35,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 01:08:35,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 01:08:35,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 01:08:35,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 01:08:35,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 01:08:35,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 01:08:35,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 01:08:35,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 01:08:35,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 01:08:35,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 01:08:35,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 01:08:35,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 01:08:35,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 01:08:35,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 01:08:35,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 01:08:35,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 01:08:35,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 01:08:35,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 01:08:35,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 01:08:35,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 01:08:35,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 01:08:35,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 01:08:35,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 01:08:35,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 01:08:35,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 01:08:35,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 01:08:35,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 01:08:35,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 01:08:35,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 01:08:35,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 01:08:35,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 01:08:35,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 01:08:35,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 01:08:35,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 01:08:35,217 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 01:08:35,244 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 01:08:35,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 01:08:35,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 01:08:35,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 01:08:35,246 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 01:08:35,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 01:08:35,246 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 01:08:35,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 01:08:35,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 01:08:35,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 01:08:35,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 01:08:35,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 01:08:35,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 01:08:35,248 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 01:08:35,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 01:08:35,248 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 01:08:35,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 01:08:35,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 01:08:35,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 01:08:35,249 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 01:08:35,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 01:08:35,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 01:08:35,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 01:08:35,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 01:08:35,250 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 01:08:35,250 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 01:08:35,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 01:08:35,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 01:08:35,251 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 01:08:35,251 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true; [2020-09-25 01:08:35,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 01:08:35,790 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 01:08:35,794 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 01:08:35,796 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 01:08:35,796 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 01:08:35,797 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-25 01:08:35,882 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9739ba0da/caa6f7926ee14a18b0efbe2dba6759bb/FLAG649cabd2f [2020-09-25 01:08:36,420 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 01:08:36,421 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-25 01:08:36,430 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9739ba0da/caa6f7926ee14a18b0efbe2dba6759bb/FLAG649cabd2f [2020-09-25 01:08:36,773 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9739ba0da/caa6f7926ee14a18b0efbe2dba6759bb [2020-09-25 01:08:36,792 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 01:08:36,801 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 01:08:36,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 01:08:36,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 01:08:36,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 01:08:36,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:08:36" (1/1) ... [2020-09-25 01:08:36,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68901205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:36, skipping insertion in model container [2020-09-25 01:08:36,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:08:36" (1/1) ... [2020-09-25 01:08:36,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 01:08:36,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 01:08:37,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:08:37,105 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 01:08:37,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:08:37,144 INFO L208 MainTranslator]: Completed translation [2020-09-25 01:08:37,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:37 WrapperNode [2020-09-25 01:08:37,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 01:08:37,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 01:08:37,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 01:08:37,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 01:08:37,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:37" (1/1) ... [2020-09-25 01:08:37,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:37" (1/1) ... [2020-09-25 01:08:37,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:37" (1/1) ... [2020-09-25 01:08:37,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:37" (1/1) ... [2020-09-25 01:08:37,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:37" (1/1) ... [2020-09-25 01:08:37,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:37" (1/1) ... [2020-09-25 01:08:37,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:37" (1/1) ... [2020-09-25 01:08:37,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 01:08:37,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 01:08:37,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 01:08:37,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 01:08:37,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 01:08:37,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 01:08:37,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 01:08:37,357 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 01:08:37,357 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-25 01:08:37,357 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 01:08:37,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 01:08:37,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 01:08:37,358 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 01:08:37,358 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-09-25 01:08:37,358 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 01:08:37,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 01:08:37,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 01:08:37,359 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 01:08:37,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 01:08:37,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 01:08:37,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 01:08:37,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 01:08:37,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 01:08:37,693 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 01:08:37,694 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 01:08:37,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:08:37 BoogieIcfgContainer [2020-09-25 01:08:37,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 01:08:37,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 01:08:37,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 01:08:37,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 01:08:37,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:08:36" (1/3) ... [2020-09-25 01:08:37,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ffd65b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:08:37, skipping insertion in model container [2020-09-25 01:08:37,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:08:37" (2/3) ... [2020-09-25 01:08:37,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ffd65b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:08:37, skipping insertion in model container [2020-09-25 01:08:37,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:08:37" (3/3) ... [2020-09-25 01:08:37,726 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-09-25 01:08:37,749 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 01:08:37,758 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 01:08:37,780 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 01:08:37,807 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 01:08:37,807 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 01:08:37,807 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 01:08:37,808 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 01:08:37,808 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 01:08:37,808 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 01:08:37,808 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 01:08:37,808 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 01:08:37,831 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-25 01:08:37,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 01:08:37,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:37,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:08:37,840 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:37,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:37,847 INFO L82 PathProgramCache]: Analyzing trace with hash -2004589429, now seen corresponding path program 1 times [2020-09-25 01:08:37,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:37,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561514351] [2020-09-25 01:08:37,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:38,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:38,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:38,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:38,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 01:08:38,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:08:38,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 298 [2020-09-25 01:08:38,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:38,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 01:08:38,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 01:08:38,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 01:08:38,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 01:08:38,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:38,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:38,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:38,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:08:38,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:38,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 01:08:38,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:38,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:38,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:38,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:38,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:38,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 01:08:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:38,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:38,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:38,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:38,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 01:08:38,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:08:38,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 01:08:38,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:38,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:38,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 01:08:38,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:38,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:08:38,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561514351] [2020-09-25 01:08:38,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:08:38,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 01:08:38,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835206991] [2020-09-25 01:08:38,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 01:08:38,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:38,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 01:08:38,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 01:08:38,498 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 5 states. [2020-09-25 01:08:38,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:38,759 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2020-09-25 01:08:38,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 01:08:38,762 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-09-25 01:08:38,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:38,778 INFO L225 Difference]: With dead ends: 109 [2020-09-25 01:08:38,778 INFO L226 Difference]: Without dead ends: 68 [2020-09-25 01:08:38,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 01:08:38,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-25 01:08:38,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-09-25 01:08:38,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 01:08:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-25 01:08:38,846 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-25 01:08:38,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:38,847 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-25 01:08:38,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 01:08:38,847 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-25 01:08:38,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 01:08:38,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:38,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:08:38,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 01:08:38,852 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:38,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:38,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1596363536, now seen corresponding path program 1 times [2020-09-25 01:08:38,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:38,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812924288] [2020-09-25 01:08:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:38,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:38,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:39,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:40,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:40,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 01:08:40,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:08:40,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1664 [2020-09-25 01:08:40,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:40,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 01:08:40,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 01:08:40,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 01:08:40,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 01:08:40,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:40,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:40,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:40,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:08:40,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:40,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 01:08:40,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:40,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:40,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:40,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:40,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:40,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 01:08:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:40,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:40,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:40,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:40,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 01:08:40,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:08:40,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 01:08:40,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:40,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 01:08:40,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 01:08:40,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 01:08:40,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:08:40,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812924288] [2020-09-25 01:08:40,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:08:40,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 01:08:40,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229205112] [2020-09-25 01:08:40,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 01:08:40,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:40,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 01:08:40,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-25 01:08:40,761 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 10 states. [2020-09-25 01:08:41,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:41,249 INFO L93 Difference]: Finished difference Result 106 states and 119 transitions. [2020-09-25 01:08:41,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 01:08:41,250 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-09-25 01:08:41,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:41,252 INFO L225 Difference]: With dead ends: 106 [2020-09-25 01:08:41,252 INFO L226 Difference]: Without dead ends: 78 [2020-09-25 01:08:41,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-25 01:08:41,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-25 01:08:41,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2020-09-25 01:08:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 01:08:41,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-09-25 01:08:41,264 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 36 [2020-09-25 01:08:41,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:41,265 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-09-25 01:08:41,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 01:08:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-09-25 01:08:41,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 01:08:41,267 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:41,267 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:08:41,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 01:08:41,267 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:41,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:41,268 INFO L82 PathProgramCache]: Analyzing trace with hash -625919587, now seen corresponding path program 1 times [2020-09-25 01:08:41,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:41,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886945479] [2020-09-25 01:08:41,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:41,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:41,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:41,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:42,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:44,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:45,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:46,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:46,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 01:08:46,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 01:08:46,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 01:08:46,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:46,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 01:08:46,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-25 01:08:46,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 01:08:46,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:46,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:46,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:46,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:46,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:08:46,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:46,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 01:08:46,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:46,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:46,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:46,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:46,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:46,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 01:08:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:46,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:46,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:46,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:46,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 01:08:46,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:08:46,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-09-25 01:08:46,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:46,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 01:08:46,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 01:08:46,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 01:08:46,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:08:46,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886945479] [2020-09-25 01:08:46,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:08:46,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 01:08:46,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238771364] [2020-09-25 01:08:46,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 01:08:46,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:46,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 01:08:46,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-09-25 01:08:46,635 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 14 states. [2020-09-25 01:08:47,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:47,133 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2020-09-25 01:08:47,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 01:08:47,134 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-09-25 01:08:47,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:47,135 INFO L225 Difference]: With dead ends: 130 [2020-09-25 01:08:47,136 INFO L226 Difference]: Without dead ends: 93 [2020-09-25 01:08:47,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2020-09-25 01:08:47,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-25 01:08:47,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 75. [2020-09-25 01:08:47,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-25 01:08:47,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2020-09-25 01:08:47,148 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 49 [2020-09-25 01:08:47,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:47,148 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2020-09-25 01:08:47,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 01:08:47,148 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2020-09-25 01:08:47,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 01:08:47,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:47,151 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:08:47,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 01:08:47,154 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:47,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:47,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1626257912, now seen corresponding path program 2 times [2020-09-25 01:08:47,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:47,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546826639] [2020-09-25 01:08:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:47,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:47,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:47,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:47,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:47,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:52,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:52,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 01:08:52,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 01:08:52,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-09-25 01:08:52,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:52,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 01:08:52,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 01:08:52,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 01:08:52,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:52,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:52,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:52,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:52,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:52,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:08:52,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:52,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 01:08:52,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:52,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:52,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:52,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:52,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:08:52,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 01:08:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:52,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:52,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:52,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:52,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 01:08:52,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:08:52,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-09-25 01:08:52,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:52,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 01:08:52,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 01:08:52,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 01:08:52,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:08:52,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546826639] [2020-09-25 01:08:52,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:08:52,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 01:08:52,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006297623] [2020-09-25 01:08:52,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 01:08:52,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:52,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 01:08:52,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-09-25 01:08:52,856 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 18 states. [2020-09-25 01:08:53,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:08:53,550 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2020-09-25 01:08:53,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-25 01:08:53,551 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-09-25 01:08:53,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:08:53,553 INFO L225 Difference]: With dead ends: 154 [2020-09-25 01:08:53,553 INFO L226 Difference]: Without dead ends: 108 [2020-09-25 01:08:53,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2020-09-25 01:08:53,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-25 01:08:53,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 90. [2020-09-25 01:08:53,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-25 01:08:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2020-09-25 01:08:53,575 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 62 [2020-09-25 01:08:53,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:08:53,578 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2020-09-25 01:08:53,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 01:08:53,578 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2020-09-25 01:08:53,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-25 01:08:53,582 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:08:53,583 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:08:53,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 01:08:53,586 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:08:53,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:08:53,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1360689845, now seen corresponding path program 3 times [2020-09-25 01:08:53,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:08:53,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091148956] [2020-09-25 01:08:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:08:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:53,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:53,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:53,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:53,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:54,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:54,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:54,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:54,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:55,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:55,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:58,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:58,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-25 01:08:58,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 01:08:58,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 01:08:58,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:58,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 01:08:58,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-25 01:08:58,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 01:08:58,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:08:58,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:08:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:58,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:58,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:58,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:08:58,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:08:58,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 01:08:58,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:58,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:08:58,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:08:58,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:08:58,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 01:08:58,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 01:08:58,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:08:58,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:58,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:08:58,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:08:58,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 01:08:58,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:08:58,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-09-25 01:08:58,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:08:58,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 01:08:58,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 01:08:58,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 01:08:58,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 01:08:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:08:59,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091148956] [2020-09-25 01:08:59,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:08:59,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-25 01:08:59,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585740723] [2020-09-25 01:08:59,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-25 01:08:59,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:08:59,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-25 01:08:59,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2020-09-25 01:08:59,147 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand 22 states. [2020-09-25 01:09:00,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:00,054 INFO L93 Difference]: Finished difference Result 178 states and 197 transitions. [2020-09-25 01:09:00,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-25 01:09:00,054 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 75 [2020-09-25 01:09:00,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:00,056 INFO L225 Difference]: With dead ends: 178 [2020-09-25 01:09:00,056 INFO L226 Difference]: Without dead ends: 123 [2020-09-25 01:09:00,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=288, Invalid=1604, Unknown=0, NotChecked=0, Total=1892 [2020-09-25 01:09:00,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-25 01:09:00,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2020-09-25 01:09:00,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-25 01:09:00,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2020-09-25 01:09:00,078 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 75 [2020-09-25 01:09:00,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:00,078 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2020-09-25 01:09:00,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-25 01:09:00,083 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2020-09-25 01:09:00,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-09-25 01:09:00,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:00,084 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:00,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 01:09:00,085 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:00,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:00,085 INFO L82 PathProgramCache]: Analyzing trace with hash -2008928032, now seen corresponding path program 4 times [2020-09-25 01:09:00,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:00,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692139133] [2020-09-25 01:09:00,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:00,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:00,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:00,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:00,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:00,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:00,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:01,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:02,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:02,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:04,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:05,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:05,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-25 01:09:05,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 01:09:05,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-25 01:09:05,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:05,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 01:09:05,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-25 01:09:05,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 01:09:05,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:05,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:05,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:05,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:05,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:09:05,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:05,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 01:09:05,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:05,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:05,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:05,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:05,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:05,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 01:09:05,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:05,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:05,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:05,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:05,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-25 01:09:05,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:09:05,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-09-25 01:09:05,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:05,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 01:09:05,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 01:09:05,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 01:09:05,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:05,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692139133] [2020-09-25 01:09:05,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:05,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-25 01:09:05,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234434897] [2020-09-25 01:09:05,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-25 01:09:05,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:05,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-25 01:09:05,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2020-09-25 01:09:05,981 INFO L87 Difference]: Start difference. First operand 105 states and 113 transitions. Second operand 26 states. [2020-09-25 01:09:07,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:07,130 INFO L93 Difference]: Finished difference Result 202 states and 223 transitions. [2020-09-25 01:09:07,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-25 01:09:07,131 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 88 [2020-09-25 01:09:07,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:07,132 INFO L225 Difference]: With dead ends: 202 [2020-09-25 01:09:07,133 INFO L226 Difference]: Without dead ends: 138 [2020-09-25 01:09:07,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=405, Invalid=2247, Unknown=0, NotChecked=0, Total=2652 [2020-09-25 01:09:07,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-25 01:09:07,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 120. [2020-09-25 01:09:07,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-25 01:09:07,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2020-09-25 01:09:07,151 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 88 [2020-09-25 01:09:07,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:07,152 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2020-09-25 01:09:07,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-25 01:09:07,152 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2020-09-25 01:09:07,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-09-25 01:09:07,154 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:07,154 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:07,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 01:09:07,154 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:07,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:07,155 INFO L82 PathProgramCache]: Analyzing trace with hash 470559693, now seen corresponding path program 5 times [2020-09-25 01:09:07,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:07,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991487239] [2020-09-25 01:09:07,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:07,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:07,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:07,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:07,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:08,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:08,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:09,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:09,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:10,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:11,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:11,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:12,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:12,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-09-25 01:09:12,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 01:09:12,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 01:09:12,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:12,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 01:09:12,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 01:09:12,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 01:09:12,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:12,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:12,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:12,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:12,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 01:09:12,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:12,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 01:09:12,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:12,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:12,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:12,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:12,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:12,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 01:09:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:12,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:12,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:12,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:13,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:13,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:13,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:14,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:14,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:14,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:15,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:15,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:17,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:17,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 01:09:17,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 01:09:17,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-25 01:09:17,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:17,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 01:09:17,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 01:09:17,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 01:09:17,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:17,593 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 16 proven. 65 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-09-25 01:09:17,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991487239] [2020-09-25 01:09:17,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:17,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 01:09:17,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096915096] [2020-09-25 01:09:17,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 01:09:17,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:17,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 01:09:17,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2020-09-25 01:09:17,596 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand 20 states. [2020-09-25 01:09:18,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:18,245 INFO L93 Difference]: Finished difference Result 203 states and 221 transitions. [2020-09-25 01:09:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 01:09:18,245 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-09-25 01:09:18,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:18,247 INFO L225 Difference]: With dead ends: 203 [2020-09-25 01:09:18,247 INFO L226 Difference]: Without dead ends: 130 [2020-09-25 01:09:18,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=326, Invalid=1234, Unknown=0, NotChecked=0, Total=1560 [2020-09-25 01:09:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-25 01:09:18,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-09-25 01:09:18,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-25 01:09:18,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2020-09-25 01:09:18,256 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 101 [2020-09-25 01:09:18,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:18,256 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2020-09-25 01:09:18,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 01:09:18,257 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2020-09-25 01:09:18,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-25 01:09:18,258 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:18,258 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:18,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 01:09:18,258 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:18,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:18,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1859478071, now seen corresponding path program 6 times [2020-09-25 01:09:18,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:18,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208042931] [2020-09-25 01:09:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:18,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:18,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:18,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:18,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:19,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking...