/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/res2o.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:12:32,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:12:32,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:12:32,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:12:32,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:12:32,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:12:32,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:12:32,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:12:32,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:12:32,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:12:32,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:12:32,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:12:32,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:12:32,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:12:32,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:12:32,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:12:32,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:12:32,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:12:32,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:12:32,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:12:32,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:12:32,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:12:32,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:12:32,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:12:32,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:12:32,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:12:32,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:12:32,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:12:32,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:12:32,103 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:12:32,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:12:32,104 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:12:32,105 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:12:32,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:12:32,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:12:32,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:12:32,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:12:32,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:12:32,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:12:32,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:12:32,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:12:32,110 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 18:12:32,149 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:12:32,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:12:32,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:12:32,153 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:12:32,153 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:12:32,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:12:32,153 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:12:32,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:12:32,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:12:32,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:12:32,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:12:32,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:12:32,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:12:32,154 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:12:32,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:12:32,155 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:12:32,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:12:32,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:12:32,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:12:32,156 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:12:32,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:12:32,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:12:32,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:12:32,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:12:32,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:12:32,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:12:32,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:12:32,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:12:32,159 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:12:32,159 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 18:12:32,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:12:32,451 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:12:32,454 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:12:32,456 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:12:32,456 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:12:32,457 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res2o.c [2020-10-14 18:12:32,528 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00345b135/4048fff62de5403480889e9732f9c31f/FLAG3c16f8179 [2020-10-14 18:12:32,986 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:12:32,987 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/res2o.c [2020-10-14 18:12:32,994 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00345b135/4048fff62de5403480889e9732f9c31f/FLAG3c16f8179 [2020-10-14 18:12:33,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00345b135/4048fff62de5403480889e9732f9c31f [2020-10-14 18:12:33,359 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:12:33,361 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:12:33,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:12:33,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:12:33,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:12:33,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:12:33" (1/1) ... [2020-10-14 18:12:33,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52db61f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:33, skipping insertion in model container [2020-10-14 18:12:33,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:12:33" (1/1) ... [2020-10-14 18:12:33,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:12:33,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:12:33,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:12:33,607 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:12:33,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:12:33,737 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:12:33,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:33 WrapperNode [2020-10-14 18:12:33,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:12:33,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:12:33,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:12:33,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:12:33,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:33" (1/1) ... [2020-10-14 18:12:33,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:33" (1/1) ... [2020-10-14 18:12:33,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:33" (1/1) ... [2020-10-14 18:12:33,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:33" (1/1) ... [2020-10-14 18:12:33,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:33" (1/1) ... [2020-10-14 18:12:33,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:33" (1/1) ... [2020-10-14 18:12:33,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:33" (1/1) ... [2020-10-14 18:12:33,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:12:33,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:12:33,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:12:33,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:12:33,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:12:33,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:12:33,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:12:33,841 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 18:12:33,841 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:12:33,841 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:12:33,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:12:33,841 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 18:12:33,841 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 18:12:33,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:12:33,842 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 18:12:33,842 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 18:12:33,842 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:12:33,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 18:12:33,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 18:12:33,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 18:12:33,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 18:12:33,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:12:33,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:12:33,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:12:34,134 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:12:34,135 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-14 18:12:34,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:12:34 BoogieIcfgContainer [2020-10-14 18:12:34,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:12:34,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:12:34,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:12:34,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:12:34,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:12:33" (1/3) ... [2020-10-14 18:12:34,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64eef85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:12:34, skipping insertion in model container [2020-10-14 18:12:34,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:12:33" (2/3) ... [2020-10-14 18:12:34,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64eef85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:12:34, skipping insertion in model container [2020-10-14 18:12:34,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:12:34" (3/3) ... [2020-10-14 18:12:34,148 INFO L109 eAbstractionObserver]: Analyzing ICFG res2o.c [2020-10-14 18:12:34,159 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:12:34,167 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:12:34,186 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:12:34,241 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:12:34,241 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:12:34,242 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:12:34,242 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:12:34,242 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:12:34,242 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:12:34,242 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:12:34,242 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:12:34,266 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-14 18:12:34,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 18:12:34,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:34,273 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] [2020-10-14 18:12:34,273 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:34,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:34,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1797528887, now seen corresponding path program 1 times [2020-10-14 18:12:34,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:34,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431389234] [2020-10-14 18:12:34,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:34,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:34,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:34,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:34,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:34,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:34,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:35,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:35,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:35,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:35,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 18:12:35,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:12:35,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1368 [2020-10-14 18:12:35,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:35,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:35,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:12:35,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:12:35,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 18:12:35,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 18:12:35,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:35,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:35,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:35,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:35,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:35,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:12:35,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:35,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:35,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:35,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:35,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:35,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:35,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:35,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:35,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:35,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:35,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:35,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:12:35,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:12:35,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:35,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:35,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:35,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:35,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:35,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:12:35,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431389234] [2020-10-14 18:12:35,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:12:35,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-14 18:12:35,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101643400] [2020-10-14 18:12:36,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:12:36,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:36,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:12:36,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:12:36,026 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 8 states. [2020-10-14 18:12:36,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:36,387 INFO L93 Difference]: Finished difference Result 98 states and 138 transitions. [2020-10-14 18:12:36,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:12:36,389 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-14 18:12:36,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:36,398 INFO L225 Difference]: With dead ends: 98 [2020-10-14 18:12:36,398 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 18:12:36,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:12:36,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 18:12:36,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-14 18:12:36,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 18:12:36,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2020-10-14 18:12:36,448 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 29 [2020-10-14 18:12:36,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:36,449 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2020-10-14 18:12:36,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:12:36,449 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2020-10-14 18:12:36,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 18:12:36,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:36,451 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] [2020-10-14 18:12:36,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:12:36,452 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:36,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:36,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1710123337, now seen corresponding path program 1 times [2020-10-14 18:12:36,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:36,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300777394] [2020-10-14 18:12:36,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:36,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:36,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:36,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:36,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:36,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:36,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:37,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:37,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:37,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:37,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:39,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:39,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 18:12:39,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 18:12:39,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3107 [2020-10-14 18:12:39,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:39,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:39,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:12:39,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:12:39,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 18:12:39,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:12:39,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:39,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:39,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:39,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:39,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:39,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:12:39,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:39,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:39,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:39,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:39,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:39,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:39,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:39,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:39,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:39,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:39,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:39,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:12:39,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:39,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:39,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:12:39,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:39,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:12:39,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:12:39,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300777394] [2020-10-14 18:12:39,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:12:39,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 18:12:39,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473361374] [2020-10-14 18:12:39,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 18:12:39,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:39,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 18:12:39,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:12:39,669 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 5 states. [2020-10-14 18:12:39,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:39,866 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2020-10-14 18:12:39,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 18:12:39,867 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-14 18:12:39,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:39,869 INFO L225 Difference]: With dead ends: 72 [2020-10-14 18:12:39,870 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 18:12:39,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:12:39,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 18:12:39,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-14 18:12:39,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-14 18:12:39,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-14 18:12:39,889 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 31 [2020-10-14 18:12:39,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:39,890 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-14 18:12:39,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 18:12:39,890 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-14 18:12:39,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 18:12:39,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:39,893 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, 1, 1, 1, 1, 1] [2020-10-14 18:12:39,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:12:39,893 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:39,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:39,894 INFO L82 PathProgramCache]: Analyzing trace with hash -774790125, now seen corresponding path program 1 times [2020-10-14 18:12:39,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:39,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735169031] [2020-10-14 18:12:39,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:39,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:40,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:40,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:41,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:42,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:43,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:43,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:44,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:44,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:44,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:44,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:44,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 18:12:44,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 18:12:44,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:12:44,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:44,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:44,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:12:44,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:44,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 18:12:44,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:45,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:45,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:45,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:45,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:45,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:45,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:12:45,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:45,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:45,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:45,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:45,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:45,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:45,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:45,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:45,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:45,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:45,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:45,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:12:45,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:45,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:45,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:45,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:45,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:45,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:12:46,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735169031] [2020-10-14 18:12:46,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:46,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:12:46,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415753438] [2020-10-14 18:12:46,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:12:46,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:46,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:12:46,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:12:46,016 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 18 states. [2020-10-14 18:12:46,903 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2020-10-14 18:12:47,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:47,550 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-10-14 18:12:47,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:12:47,550 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-10-14 18:12:47,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:47,552 INFO L225 Difference]: With dead ends: 61 [2020-10-14 18:12:47,552 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 18:12:47,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:12:47,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 18:12:47,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-10-14 18:12:47,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 18:12:47,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-10-14 18:12:47,562 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 41 [2020-10-14 18:12:47,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:47,563 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-10-14 18:12:47,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:12:47,563 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-10-14 18:12:47,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 18:12:47,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:47,565 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:47,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:12:47,565 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:47,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:47,565 INFO L82 PathProgramCache]: Analyzing trace with hash 96401429, now seen corresponding path program 2 times [2020-10-14 18:12:47,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:47,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086291508] [2020-10-14 18:12:47,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:47,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:47,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:47,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:47,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:49,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:52,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:52,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 18:12:52,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:12:52,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 18:12:52,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:52,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:52,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:12:52,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 18:12:52,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 18:12:52,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:52,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:52,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:52,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:52,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:52,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:52,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:52,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:52,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:52,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:52,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:52,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:52,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:52,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:52,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:52,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:52,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:52,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:52,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:52,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:52,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:52,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:52,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:52,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:52,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:52,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:12:52,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086291508] [2020-10-14 18:12:52,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:52,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:12:52,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126621734] [2020-10-14 18:12:52,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:12:52,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:52,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:12:52,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:12:52,666 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 8 states. [2020-10-14 18:12:52,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:52,998 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2020-10-14 18:12:52,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:12:52,998 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-14 18:12:52,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:53,000 INFO L225 Difference]: With dead ends: 105 [2020-10-14 18:12:53,000 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 18:12:53,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:12:53,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 18:12:53,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2020-10-14 18:12:53,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 18:12:53,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2020-10-14 18:12:53,012 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 43 [2020-10-14 18:12:53,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:53,013 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2020-10-14 18:12:53,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:12:53,013 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2020-10-14 18:12:53,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 18:12:53,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:53,015 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:53,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:12:53,015 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:53,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:53,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1819715733, now seen corresponding path program 3 times [2020-10-14 18:12:53,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:53,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831352027] [2020-10-14 18:12:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:53,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:53,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:53,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:53,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:53,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:58,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:58,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 18:12:58,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:12:58,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:12:58,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:58,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:58,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:12:58,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:58,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:12:58,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:58,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:58,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:58,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:58,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:58,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:58,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:12:58,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:58,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:58,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:58,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:58,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:58,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:58,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:58,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:58,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:58,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:58,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:58,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:58,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:58,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:58,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:58,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:58,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:58,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:12:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:12:58,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831352027] [2020-10-14 18:12:58,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:58,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:12:58,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935324925] [2020-10-14 18:12:58,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:12:58,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:58,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:12:58,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:12:58,100 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand 8 states. [2020-10-14 18:12:58,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:58,356 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2020-10-14 18:12:58,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:12:58,357 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-14 18:12:58,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:58,358 INFO L225 Difference]: With dead ends: 112 [2020-10-14 18:12:58,358 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 18:12:58,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:12:58,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 18:12:58,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-10-14 18:12:58,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 18:12:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-14 18:12:58,372 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 43 [2020-10-14 18:12:58,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:58,375 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-14 18:12:58,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:12:58,375 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-14 18:12:58,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 18:12:58,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:58,378 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:58,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:12:58,379 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:58,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:58,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1021500449, now seen corresponding path program 4 times [2020-10-14 18:12:58,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:58,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446928308] [2020-10-14 18:12:58,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:58,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:58,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:59,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:00,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:00,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:02,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:02,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:03,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:03,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:03,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 18:13:03,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:13:03,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 18:13:03,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:03,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:03,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 18:13:03,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:13:03,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 18:13:03,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:13:04,310 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-14 18:13:04,588 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-14 18:13:04,746 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-14 18:13:04,910 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-14 18:13:05,045 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-14 18:13:05,231 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-14 18:13:06,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:06,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:06,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:06,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:06,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:06,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:06,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:06,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:06,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:06,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:06,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:06,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:06,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:06,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:06,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:06,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:06,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:06,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:06,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:06,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:06,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:06,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:06,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:06,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:13:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:13:06,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446928308] [2020-10-14 18:13:06,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:06,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 18:13:06,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687160696] [2020-10-14 18:13:06,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 18:13:06,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:06,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 18:13:06,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:13:06,457 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 30 states. [2020-10-14 18:13:07,607 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-14 18:13:08,421 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 70 [2020-10-14 18:13:08,867 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 70 [2020-10-14 18:13:09,125 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 70 [2020-10-14 18:13:09,328 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2020-10-14 18:13:10,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:10,406 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2020-10-14 18:13:10,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 18:13:10,407 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 53 [2020-10-14 18:13:10,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:10,409 INFO L225 Difference]: With dead ends: 77 [2020-10-14 18:13:10,409 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 18:13:10,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=393, Invalid=2799, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 18:13:10,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 18:13:10,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2020-10-14 18:13:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 18:13:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-10-14 18:13:10,422 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 53 [2020-10-14 18:13:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:10,423 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-10-14 18:13:10,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 18:13:10,423 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-10-14 18:13:10,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 18:13:10,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:10,424 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:10,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:13:10,424 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:10,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:10,424 INFO L82 PathProgramCache]: Analyzing trace with hash 526443745, now seen corresponding path program 5 times [2020-10-14 18:13:10,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:10,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325628502] [2020-10-14 18:13:10,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:10,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:10,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:10,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:10,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:12,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:15,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:15,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 18:13:15,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:13:15,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:13:15,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:15,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:15,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:13:15,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-14 18:13:15,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 18:13:15,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:15,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:15,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:15,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:15,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:15,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:15,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:15,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:15,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:15,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:15,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:15,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:15,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:15,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:15,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:15,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:15,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:15,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:15,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:13:15,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:15,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:15,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:15,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:15,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:15,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 18:13:15,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325628502] [2020-10-14 18:13:15,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:15,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:13:15,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143694857] [2020-10-14 18:13:15,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:13:15,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:15,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:13:15,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:13:15,531 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 10 states. [2020-10-14 18:13:16,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:16,035 INFO L93 Difference]: Finished difference Result 137 states and 157 transitions. [2020-10-14 18:13:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:13:16,035 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-14 18:13:16,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:16,037 INFO L225 Difference]: With dead ends: 137 [2020-10-14 18:13:16,037 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 18:13:16,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:13:16,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 18:13:16,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 85. [2020-10-14 18:13:16,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-14 18:13:16,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-10-14 18:13:16,058 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 55 [2020-10-14 18:13:16,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:16,059 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-10-14 18:13:16,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:13:16,059 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-10-14 18:13:16,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 18:13:16,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:16,060 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:16,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:13:16,060 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:16,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:16,061 INFO L82 PathProgramCache]: Analyzing trace with hash 954295649, now seen corresponding path program 6 times [2020-10-14 18:13:16,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:16,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092241254] [2020-10-14 18:13:16,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:16,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:16,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:16,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:16,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:16,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:21,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:21,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 18:13:21,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:13:21,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:13:21,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:21,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:21,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:13:21,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 18:13:21,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 18:13:21,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:21,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:21,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:21,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:21,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:21,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:21,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:21,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:21,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:21,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:21,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:21,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:21,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:21,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:21,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:21,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:21,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:21,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:21,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:21,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:21,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:21,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:21,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:21,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:21,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 18:13:21,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092241254] [2020-10-14 18:13:21,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:21,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:13:21,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623015855] [2020-10-14 18:13:21,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:13:21,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:21,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:13:21,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:13:21,160 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 10 states. [2020-10-14 18:13:21,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:21,497 INFO L93 Difference]: Finished difference Result 142 states and 156 transitions. [2020-10-14 18:13:21,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:13:21,498 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-14 18:13:21,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:21,499 INFO L225 Difference]: With dead ends: 142 [2020-10-14 18:13:21,499 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 18:13:21,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:13:21,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 18:13:21,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2020-10-14 18:13:21,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 18:13:21,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-10-14 18:13:21,524 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 55 [2020-10-14 18:13:21,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:21,524 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-10-14 18:13:21,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:13:21,525 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-10-14 18:13:21,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 18:13:21,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:21,526 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:21,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:13:21,526 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:21,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:21,527 INFO L82 PathProgramCache]: Analyzing trace with hash 739017131, now seen corresponding path program 7 times [2020-10-14 18:13:21,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:21,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471820943] [2020-10-14 18:13:21,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:21,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:22,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:23,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:24,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:25,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:26,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:26,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 18:13:26,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:13:26,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 18:13:26,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:26,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:26,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 18:13:26,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:13:26,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 18:13:26,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:27,210 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2020-10-14 18:13:27,333 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-14 18:13:27,606 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-14 18:13:27,765 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-14 18:13:27,939 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-10-14 18:13:28,105 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-10-14 18:13:28,280 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-10-14 18:13:28,445 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-14 18:13:28,660 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-10-14 18:13:28,946 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-10-14 18:13:29,186 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-14 18:13:29,417 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-14 18:13:29,642 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-10-14 18:13:29,833 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-14 18:13:30,062 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2020-10-14 18:13:30,322 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2020-10-14 18:13:30,562 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2020-10-14 18:13:30,756 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-10-14 18:13:30,979 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-14 18:13:32,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:32,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:32,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:32,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:32,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:32,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:32,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:32,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:32,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:32,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:32,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:32,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:32,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:32,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:32,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:32,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:32,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:32,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:13:32,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:32,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:32,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:32,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:32,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:32,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:13:32,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471820943] [2020-10-14 18:13:32,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:32,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 18:13:32,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011675821] [2020-10-14 18:13:32,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 18:13:32,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:32,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 18:13:32,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1562, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:13:32,817 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 42 states. [2020-10-14 18:13:33,567 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-14 18:13:34,649 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2020-10-14 18:13:36,196 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 84 [2020-10-14 18:13:36,956 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 85 [2020-10-14 18:13:37,311 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 78 [2020-10-14 18:13:37,784 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 87 [2020-10-14 18:13:38,139 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 76 [2020-10-14 18:13:38,432 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2020-10-14 18:13:39,049 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2020-10-14 18:13:39,278 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-14 18:13:39,485 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-14 18:13:40,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:40,386 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2020-10-14 18:13:40,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 18:13:40,387 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 65 [2020-10-14 18:13:40,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:40,388 INFO L225 Difference]: With dead ends: 93 [2020-10-14 18:13:40,388 INFO L226 Difference]: Without dead ends: 87 [2020-10-14 18:13:40,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=581, Invalid=5581, Unknown=0, NotChecked=0, Total=6162 [2020-10-14 18:13:40,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-14 18:13:40,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2020-10-14 18:13:40,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 18:13:40,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2020-10-14 18:13:40,418 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 65 [2020-10-14 18:13:40,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:40,418 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2020-10-14 18:13:40,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 18:13:40,419 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2020-10-14 18:13:40,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 18:13:40,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:40,420 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:13:40,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:13:40,420 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:40,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:40,421 INFO L82 PathProgramCache]: Analyzing trace with hash -116183123, now seen corresponding path program 8 times [2020-10-14 18:13:40,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:40,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222249839] [2020-10-14 18:13:40,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:40,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:40,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:40,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:40,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:45,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:45,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 18:13:45,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:13:45,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 18:13:45,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:45,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:45,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:13:45,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:13:45,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 18:13:45,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:45,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:45,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:45,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:45,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:45,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:45,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:45,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:45,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:45,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:45,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:45,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:45,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:45,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:45,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:45,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:45,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:45,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:45,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:13:45,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:45,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:45,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:45,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:45,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:45,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:13:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 18:13:45,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222249839] [2020-10-14 18:13:45,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:45,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:13:45,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545132693] [2020-10-14 18:13:45,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:13:45,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:45,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:13:45,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:13:45,553 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 12 states. [2020-10-14 18:13:46,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:46,018 INFO L93 Difference]: Finished difference Result 191 states and 212 transitions. [2020-10-14 18:13:46,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:13:46,019 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-10-14 18:13:46,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:46,020 INFO L225 Difference]: With dead ends: 191 [2020-10-14 18:13:46,020 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 18:13:46,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:13:46,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 18:13:46,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 84. [2020-10-14 18:13:46,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-14 18:13:46,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2020-10-14 18:13:46,033 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 67 [2020-10-14 18:13:46,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:46,033 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2020-10-14 18:13:46,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:13:46,034 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2020-10-14 18:13:46,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 18:13:46,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:46,035 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-10-14 18:13:46,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:13:46,035 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:46,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:46,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1365961421, now seen corresponding path program 9 times [2020-10-14 18:13:46,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:46,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537606093] [2020-10-14 18:13:46,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:46,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:46,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:46,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:46,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:51,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:51,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 18:13:51,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:13:51,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:13:51,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:51,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:51,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:13:51,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:13:51,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 18:13:51,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:51,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:13:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:51,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:51,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:51,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:13:51,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:51,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:51,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:51,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:51,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:51,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:51,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:51,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:13:51,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:13:51,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:51,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:51,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:51,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:13:51,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:13:51,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:13:51,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:51,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:51,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:13:51,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:13:51,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:13:51,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:13:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-14 18:13:51,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537606093] [2020-10-14 18:13:51,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:13:51,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:13:51,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665709378] [2020-10-14 18:13:51,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:13:51,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:13:51,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:13:51,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:13:51,209 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 12 states. [2020-10-14 18:13:51,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:13:51,855 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-10-14 18:13:51,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:13:51,856 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-10-14 18:13:51,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:13:51,857 INFO L225 Difference]: With dead ends: 92 [2020-10-14 18:13:51,857 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 18:13:51,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:13:51,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 18:13:51,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-14 18:13:51,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-14 18:13:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-10-14 18:13:51,877 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 73 [2020-10-14 18:13:51,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:13:51,878 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-10-14 18:13:51,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:13:51,878 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-10-14 18:13:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 18:13:51,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:13:51,880 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2020-10-14 18:13:51,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:13:51,881 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:13:51,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:13:51,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1709261449, now seen corresponding path program 10 times [2020-10-14 18:13:51,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:13:51,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758606496] [2020-10-14 18:13:51,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:13:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:13:51,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:53,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:54,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:56,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:13:57,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:13:57,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 18:13:57,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:13:57,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5392 [2020-10-14 18:13:57,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:13:57,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:13:57,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-14 18:13:57,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:13:57,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 18:13:57,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:13:57,825 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2020-10-14 18:13:57,950 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2020-10-14 18:13:58,082 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-10-14 18:13:58,222 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-10-14 18:13:58,358 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-14 18:13:58,652 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2020-10-14 18:13:58,823 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2020-10-14 18:13:59,012 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2020-10-14 18:13:59,204 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2020-10-14 18:13:59,417 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2020-10-14 18:13:59,622 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2020-10-14 18:13:59,826 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-14 18:14:00,010 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-14 18:14:00,257 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-10-14 18:14:00,512 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-14 18:14:00,774 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-14 18:14:01,027 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-14 18:14:01,293 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-10-14 18:14:01,549 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-10-14 18:14:02,216 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-10-14 18:14:02,442 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-14 18:14:02,742 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2020-10-14 18:14:03,186 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-10-14 18:14:03,591 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2020-10-14 18:14:03,967 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-10-14 18:14:06,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:14:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:06,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:06,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:06,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:14:06,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:06,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:14:06,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:06,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:06,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:06,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:06,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:06,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:06,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:14:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:06,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:06,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:06,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:06,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:06,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:14:06,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:06,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:06,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:06,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:06,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:06,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:14:06,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758606496] [2020-10-14 18:14:06,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:14:06,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-14 18:14:06,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300770996] [2020-10-14 18:14:06,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-14 18:14:06,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:14:06,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-14 18:14:06,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=2645, Unknown=0, NotChecked=0, Total=2862 [2020-10-14 18:14:06,494 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 54 states. [2020-10-14 18:14:08,060 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-14 18:14:10,091 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2020-10-14 18:14:11,683 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-14 18:14:12,223 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-14 18:14:13,059 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 97 [2020-10-14 18:14:13,469 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 18:14:13,921 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-10-14 18:14:14,739 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 95 [2020-10-14 18:14:15,552 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 94 [2020-10-14 18:14:16,434 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 99 [2020-10-14 18:14:17,324 WARN L193 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 98 [2020-10-14 18:14:18,185 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 98 [2020-10-14 18:14:19,057 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 94 [2020-10-14 18:14:19,642 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 80 [2020-10-14 18:14:19,970 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-10-14 18:14:20,259 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-14 18:14:20,723 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 74 [2020-10-14 18:14:21,037 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-14 18:14:21,606 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-14 18:14:23,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:14:23,327 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2020-10-14 18:14:23,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-14 18:14:23,328 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 77 [2020-10-14 18:14:23,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:14:23,329 INFO L225 Difference]: With dead ends: 109 [2020-10-14 18:14:23,329 INFO L226 Difference]: Without dead ends: 103 [2020-10-14 18:14:23,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2896 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=816, Invalid=9896, Unknown=0, NotChecked=0, Total=10712 [2020-10-14 18:14:23,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-14 18:14:23,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2020-10-14 18:14:23,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 18:14:23,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2020-10-14 18:14:23,345 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 77 [2020-10-14 18:14:23,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:14:23,346 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2020-10-14 18:14:23,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-14 18:14:23,346 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2020-10-14 18:14:23,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 18:14:23,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:14:23,347 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2020-10-14 18:14:23,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:14:23,347 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:14:23,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:14:23,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1248536455, now seen corresponding path program 11 times [2020-10-14 18:14:23,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:14:23,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797767890] [2020-10-14 18:14:23,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:14:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:23,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:23,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:23,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:23,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:28,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:28,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 18:14:28,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:14:28,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:14:28,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:28,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:28,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:14:28,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:14:28,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:14:28,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:28,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:14:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:28,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:28,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:28,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:14:28,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:28,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:14:28,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:28,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:28,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:28,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:28,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:28,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:14:28,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:14:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:28,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:28,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:28,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:28,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:28,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:14:28,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:28,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:28,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:28,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:28,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:28,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:14:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 18:14:28,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797767890] [2020-10-14 18:14:28,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:14:28,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:14:28,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770217218] [2020-10-14 18:14:28,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:14:28,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:14:28,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:14:28,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:14:28,566 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand 14 states. [2020-10-14 18:14:29,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:14:29,290 INFO L93 Difference]: Finished difference Result 225 states and 246 transitions. [2020-10-14 18:14:29,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:14:29,291 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 79 [2020-10-14 18:14:29,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:14:29,292 INFO L225 Difference]: With dead ends: 225 [2020-10-14 18:14:29,292 INFO L226 Difference]: Without dead ends: 112 [2020-10-14 18:14:29,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:14:29,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-14 18:14:29,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 98. [2020-10-14 18:14:29,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-14 18:14:29,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2020-10-14 18:14:29,305 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 79 [2020-10-14 18:14:29,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:14:29,305 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2020-10-14 18:14:29,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:14:29,305 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2020-10-14 18:14:29,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-14 18:14:29,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:14:29,306 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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] [2020-10-14 18:14:29,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:14:29,307 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:14:29,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:14:29,307 INFO L82 PathProgramCache]: Analyzing trace with hash 721478911, now seen corresponding path program 12 times [2020-10-14 18:14:29,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:14:29,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084613239] [2020-10-14 18:14:29,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:14:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:29,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:29,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:29,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:29,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:34,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:34,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-14 18:14:34,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:14:34,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 18:14:34,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:34,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:34,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:14:34,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:14:34,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 18:14:34,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:34,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:14:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:34,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:34,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:34,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:14:34,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:34,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:14:34,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:34,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:34,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:34,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:34,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:34,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:14:34,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:14:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:34,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:34,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:34,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:34,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:34,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:14:34,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:34,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:34,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:34,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:34,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:34,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-14 18:14:34,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084613239] [2020-10-14 18:14:34,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:14:34,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:14:34,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292543202] [2020-10-14 18:14:34,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:14:34,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:14:34,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:14:34,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:14:34,509 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand 14 states. [2020-10-14 18:14:35,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:14:35,198 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-10-14 18:14:35,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:14:35,199 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 85 [2020-10-14 18:14:35,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:14:35,201 INFO L225 Difference]: With dead ends: 106 [2020-10-14 18:14:35,201 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 18:14:35,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:14:35,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 18:14:35,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-14 18:14:35,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-14 18:14:35,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-10-14 18:14:35,212 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 85 [2020-10-14 18:14:35,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:14:35,212 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-10-14 18:14:35,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:14:35,212 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-10-14 18:14:35,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-14 18:14:35,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:14:35,213 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2020-10-14 18:14:35,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:14:35,213 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:14:35,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:14:35,214 INFO L82 PathProgramCache]: Analyzing trace with hash -682436797, now seen corresponding path program 13 times [2020-10-14 18:14:35,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:14:35,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143245244] [2020-10-14 18:14:35,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:14:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:35,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:37,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:40,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:40,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-14 18:14:40,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:14:40,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 18:14:40,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:40,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:40,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-14 18:14:40,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:14:40,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-14 18:14:40,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:40,789 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-14 18:14:40,901 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-14 18:14:41,036 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-14 18:14:41,165 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-14 18:14:41,330 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2020-10-14 18:14:41,485 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2020-10-14 18:14:41,641 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-14 18:14:41,805 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-14 18:14:41,981 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-14 18:14:42,144 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-14 18:14:42,371 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2020-10-14 18:14:42,596 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2020-10-14 18:14:42,855 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 62 [2020-10-14 18:14:43,139 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 62 [2020-10-14 18:14:43,471 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 72 [2020-10-14 18:14:43,792 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 72 [2020-10-14 18:14:44,074 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 66 [2020-10-14 18:14:44,359 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 66 [2020-10-14 18:14:44,629 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-14 18:14:44,918 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-10-14 18:14:45,279 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 71 [2020-10-14 18:14:45,620 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2020-10-14 18:14:45,943 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2020-10-14 18:14:46,265 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2020-10-14 18:14:46,696 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 76 [2020-10-14 18:14:47,063 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 76 [2020-10-14 18:14:47,532 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2020-10-14 18:14:47,891 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2020-10-14 18:14:48,283 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2020-10-14 18:14:48,600 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-14 18:14:49,015 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2020-10-14 18:14:49,309 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-10-14 18:14:49,726 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-10-14 18:14:50,024 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-14 18:14:50,423 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 84 [2020-10-14 18:14:50,712 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-10-14 18:14:51,085 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2020-10-14 18:14:51,347 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-14 18:14:51,644 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-14 18:14:51,871 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-14 18:14:52,166 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-14 18:14:52,623 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-10-14 18:14:53,146 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-14 18:14:53,627 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-14 18:14:56,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:14:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:56,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:56,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:56,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:14:56,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:56,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:14:56,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:56,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:56,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:56,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:56,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:56,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:56,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:14:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:14:56,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:14:56,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:14:56,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:14:56,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:14:56,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:14:56,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:14:56,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:14:56,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:14:56,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:14:56,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:14:56,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:14:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:14:56,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143245244] [2020-10-14 18:14:56,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:14:56,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-14 18:14:56,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286529719] [2020-10-14 18:14:56,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-14 18:14:56,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:14:56,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-14 18:14:56,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=4037, Unknown=0, NotChecked=0, Total=4290 [2020-10-14 18:14:56,538 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 66 states. [2020-10-14 18:14:58,802 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-14 18:15:02,058 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2020-10-14 18:15:02,802 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-10-14 18:15:03,411 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-14 18:15:04,092 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-14 18:15:04,541 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-10-14 18:15:04,927 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-14 18:15:05,268 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-14 18:15:05,624 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-14 18:15:06,622 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 97 [2020-10-14 18:15:07,075 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-10-14 18:15:07,630 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-10-14 18:15:09,126 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 201 DAG size of output: 108 [2020-10-14 18:15:10,539 WARN L193 SmtUtils]: Spent 999.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 107 [2020-10-14 18:15:11,849 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 109 [2020-10-14 18:15:13,143 WARN L193 SmtUtils]: Spent 879.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 105 [2020-10-14 18:15:14,090 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 106 [2020-10-14 18:15:15,107 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 100 [2020-10-14 18:15:15,804 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 99 [2020-10-14 18:15:16,436 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 91 [2020-10-14 18:15:16,943 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 81 [2020-10-14 18:15:17,304 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2020-10-14 18:15:17,612 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-14 18:15:18,410 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 81 [2020-10-14 18:15:19,102 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-14 18:15:21,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:15:21,506 INFO L93 Difference]: Finished difference Result 125 states and 132 transitions. [2020-10-14 18:15:21,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-14 18:15:21,507 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 89 [2020-10-14 18:15:21,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:15:21,508 INFO L225 Difference]: With dead ends: 125 [2020-10-14 18:15:21,508 INFO L226 Difference]: Without dead ends: 119 [2020-10-14 18:15:21,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3822 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=865, Invalid=13415, Unknown=0, NotChecked=0, Total=14280 [2020-10-14 18:15:21,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-14 18:15:21,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 107. [2020-10-14 18:15:21,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 18:15:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2020-10-14 18:15:21,529 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 89 [2020-10-14 18:15:21,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:15:21,529 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2020-10-14 18:15:21,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-14 18:15:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2020-10-14 18:15:21,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-14 18:15:21,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:15:21,530 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 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] [2020-10-14 18:15:21,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:15:21,530 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:15:21,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:15:21,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1411702597, now seen corresponding path program 14 times [2020-10-14 18:15:21,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:15:21,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59353734] [2020-10-14 18:15:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:15:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:15:21,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:21,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:21,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:21,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:26,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:15:26,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 18:15:26,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:15:26,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 18:15:26,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:15:26,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:15:26,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:15:26,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:15:26,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 18:15:26,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:15:26,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:15:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:15:26,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:26,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:15:26,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:15:26,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:15:26,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:15:26,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:15:26,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:15:26,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:15:26,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:15:26,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:15:26,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:15:26,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:15:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:15:26,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:26,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:15:26,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:15:26,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:15:26,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:15:26,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:15:26,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:15:26,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:15:26,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:15:26,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:15:26,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:15:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 18:15:26,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59353734] [2020-10-14 18:15:26,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:15:26,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:15:26,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566699568] [2020-10-14 18:15:26,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:15:26,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:15:26,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:15:26,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:15:26,779 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand 16 states. [2020-10-14 18:15:27,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:15:27,702 INFO L93 Difference]: Finished difference Result 259 states and 280 transitions. [2020-10-14 18:15:27,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:15:27,704 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 91 [2020-10-14 18:15:27,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:15:27,705 INFO L225 Difference]: With dead ends: 259 [2020-10-14 18:15:27,705 INFO L226 Difference]: Without dead ends: 126 [2020-10-14 18:15:27,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:15:27,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-14 18:15:27,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2020-10-14 18:15:27,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-14 18:15:27,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2020-10-14 18:15:27,720 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 91 [2020-10-14 18:15:27,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:15:27,720 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2020-10-14 18:15:27,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:15:27,720 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2020-10-14 18:15:27,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-14 18:15:27,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:15:27,721 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 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] [2020-10-14 18:15:27,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:15:27,721 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:15:27,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:15:27,722 INFO L82 PathProgramCache]: Analyzing trace with hash 758158027, now seen corresponding path program 15 times [2020-10-14 18:15:27,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:15:27,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127813871] [2020-10-14 18:15:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:15:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:15:27,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:27,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:27,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:27,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:32,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:15:32,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-14 18:15:32,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:15:32,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-14 18:15:32,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:15:32,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:15:32,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:15:32,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:15:32,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 18:15:32,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:15:32,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:15:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:15:32,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:32,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:15:32,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:15:32,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:15:32,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:15:32,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:15:32,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:15:32,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:15:33,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:15:33,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:15:33,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:15:33,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:15:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:15:33,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:33,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:15:33,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:15:33,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:15:33,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:15:33,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:15:33,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:15:33,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:15:33,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:15:33,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:15:33,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:15:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-10-14 18:15:33,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127813871] [2020-10-14 18:15:33,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:15:33,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:15:33,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377793849] [2020-10-14 18:15:33,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:15:33,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:15:33,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:15:33,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:15:33,011 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand 16 states. [2020-10-14 18:15:34,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:15:34,074 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-10-14 18:15:34,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:15:34,075 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-10-14 18:15:34,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:15:34,076 INFO L225 Difference]: With dead ends: 120 [2020-10-14 18:15:34,076 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 18:15:34,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:15:34,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 18:15:34,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-14 18:15:34,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-14 18:15:34,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-10-14 18:15:34,091 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 97 [2020-10-14 18:15:34,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:15:34,092 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-10-14 18:15:34,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:15:34,092 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-10-14 18:15:34,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-14 18:15:34,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:15:34,093 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-14 18:15:34,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 18:15:34,093 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:15:34,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:15:34,093 INFO L82 PathProgramCache]: Analyzing trace with hash -366489841, now seen corresponding path program 16 times [2020-10-14 18:15:34,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:15:34,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880464122] [2020-10-14 18:15:34,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:15:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:15:34,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:37,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:15:40,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:15:40,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-14 18:15:40,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:15:40,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6064 [2020-10-14 18:15:40,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:15:40,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:15:40,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 79 [2020-10-14 18:15:40,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:15:40,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-14 18:15:40,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:15:41,145 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-14 18:15:41,267 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-14 18:15:41,442 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2020-10-14 18:15:41,595 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2020-10-14 18:15:41,805 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50 [2020-10-14 18:15:42,090 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50 [2020-10-14 18:15:42,350 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-14 18:15:42,551 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 46 [2020-10-14 18:15:42,791 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-10-14 18:15:43,085 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-10-14 18:15:43,377 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2020-10-14 18:15:43,707 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2020-10-14 18:15:43,986 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-10-14 18:15:44,371 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 74 [2020-10-14 18:15:44,728 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 74 [2020-10-14 18:15:45,155 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 79 [2020-10-14 18:15:45,581 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 79 [2020-10-14 18:15:46,020 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 81 [2020-10-14 18:15:46,462 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 81 [2020-10-14 18:15:46,917 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 82 [2020-10-14 18:15:47,353 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 82 [2020-10-14 18:15:47,868 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 89 [2020-10-14 18:15:48,350 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 89 [2020-10-14 18:15:48,975 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 96 [2020-10-14 18:15:49,456 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 89 [2020-10-14 18:15:50,053 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 101 [2020-10-14 18:15:50,638 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 101 [2020-10-14 18:15:51,317 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 105 [2020-10-14 18:15:51,944 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 105 [2020-10-14 18:15:52,692 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 104 [2020-10-14 18:15:53,340 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 104 [2020-10-14 18:15:54,047 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 109 [2020-10-14 18:15:54,760 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 118 [2020-10-14 18:15:55,540 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 116 [2020-10-14 18:15:56,253 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 116 [2020-10-14 18:15:56,990 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 109 [2020-10-14 18:15:57,645 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 101 [2020-10-14 18:15:58,355 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 102 [2020-10-14 18:15:59,002 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 94 [2020-10-14 18:15:59,928 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 109 [2020-10-14 18:16:00,756 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 105 [2020-10-14 18:16:01,498 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 109 [2020-10-14 18:16:02,132 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 102 [2020-10-14 18:16:02,891 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 106 [2020-10-14 18:16:03,514 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 99 [2020-10-14 18:16:04,276 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 106 [2020-10-14 18:16:04,946 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 100 [2020-10-14 18:16:05,754 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 101 [2020-10-14 18:16:06,358 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 90 [2020-10-14 18:16:07,077 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 91 [2020-10-14 18:16:07,462 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-14 18:16:07,984 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-10-14 18:16:08,413 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2020-10-14 18:16:08,884 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-10-14 18:16:09,640 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-10-14 18:16:10,353 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-14 18:16:12,314 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 54 [2020-10-14 18:16:12,746 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2020-10-14 18:16:16,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:16:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:16,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:16,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:16,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:16:16,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:16,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:16:16,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:16,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:16,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:16:16,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:16,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:16:16,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:16:16,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:16:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:16:16,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:16:16,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:16:16,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:16:16,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:16:16,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:16:16,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:16:16,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:16:16,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:16:16,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:16:16,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:16:16,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:16:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:16:16,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880464122] [2020-10-14 18:16:16,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:16:16,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-10-14 18:16:16,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450841358] [2020-10-14 18:16:16,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-10-14 18:16:16,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:16:16,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-10-14 18:16:16,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=6007, Unknown=0, NotChecked=0, Total=6480 [2020-10-14 18:16:16,538 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 81 states. [2020-10-14 18:16:17,834 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2020-10-14 18:16:18,213 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-14 18:16:18,634 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2020-10-14 18:16:19,115 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2020-10-14 18:16:19,579 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-14 18:16:20,102 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 54 [2020-10-14 18:16:20,772 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 57 [2020-10-14 18:16:22,243 WARN L193 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 116 [2020-10-14 18:16:23,773 WARN L193 SmtUtils]: Spent 754.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 104 [2020-10-14 18:16:25,109 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 111 [2020-10-14 18:16:26,346 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 107 [2020-10-14 18:16:27,197 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 71 [2020-10-14 18:16:29,451 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 174 DAG size of output: 118 [2020-10-14 18:16:30,294 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 67