/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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-examples/standard_copy8_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:30:43,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:30:43,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:30:43,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:30:43,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:30:43,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:30:43,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:30:43,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:30:43,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:30:43,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:30:43,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:30:43,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:30:43,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:30:43,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:30:43,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:30:43,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:30:43,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:30:43,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:30:43,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:30:43,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:30:43,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:30:43,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:30:43,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:30:43,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:30:43,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:30:43,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:30:43,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:30:43,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:30:43,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:30:43,183 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:30:43,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:30:43,184 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:30:43,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:30:43,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:30:43,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:30:43,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:30:43,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:30:43,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:30:43,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:30:43,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:30:43,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:30:43,192 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 [2020-10-13 23:30:43,244 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:30:43,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:30:43,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:30:43,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:30:43,246 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:30:43,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:30:43,248 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:30:43,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:30:43,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:30:43,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:30:43,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:30:43,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:30:43,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:30:43,249 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:30:43,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:30:43,250 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:30:43,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:30:43,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:30:43,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:30:43,251 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:30:43,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:30:43,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:30:43,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:30:43,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:30:43,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:30:43,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:30:43,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:30:43,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:30:43,253 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:30:43,253 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:30:43,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:30:43,561 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:30:43,564 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:30:43,566 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:30:43,566 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:30:43,567 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2020-10-13 23:30:43,625 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/409011ff5/c44620a1b8fe45bd9387a1bc2e143063/FLAG39a0730a1 [2020-10-13 23:30:44,032 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:30:44,033 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2020-10-13 23:30:44,039 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/409011ff5/c44620a1b8fe45bd9387a1bc2e143063/FLAG39a0730a1 [2020-10-13 23:30:44,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/409011ff5/c44620a1b8fe45bd9387a1bc2e143063 [2020-10-13 23:30:44,401 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:30:44,403 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:30:44,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:30:44,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:30:44,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:30:44,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:30:44" (1/1) ... [2020-10-13 23:30:44,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4076c4d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:44, skipping insertion in model container [2020-10-13 23:30:44,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:30:44" (1/1) ... [2020-10-13 23:30:44,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:30:44,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:30:44,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:30:44,638 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:30:44,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:30:44,778 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:30:44,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:44 WrapperNode [2020-10-13 23:30:44,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:30:44,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:30:44,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:30:44,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:30:44,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:44" (1/1) ... [2020-10-13 23:30:44,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:44" (1/1) ... [2020-10-13 23:30:44,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:44" (1/1) ... [2020-10-13 23:30:44,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:44" (1/1) ... [2020-10-13 23:30:44,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:44" (1/1) ... [2020-10-13 23:30:44,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:44" (1/1) ... [2020-10-13 23:30:44,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:44" (1/1) ... [2020-10-13 23:30:44,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:30:44,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:30:44,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:30:44,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:30:44,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:44" (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 [2020-10-13 23:30:44,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:30:44,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:30:44,880 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:30:44,880 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:30:44,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:30:44,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:30:44,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:30:44,880 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:30:44,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:30:44,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:30:44,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:30:44,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:30:44,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:30:44,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:30:45,298 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:30:45,299 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-13 23:30:45,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:30:45 BoogieIcfgContainer [2020-10-13 23:30:45,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:30:45,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:30:45,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:30:45,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:30:45,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:30:44" (1/3) ... [2020-10-13 23:30:45,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a38613e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:30:45, skipping insertion in model container [2020-10-13 23:30:45,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:44" (2/3) ... [2020-10-13 23:30:45,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a38613e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:30:45, skipping insertion in model container [2020-10-13 23:30:45,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:30:45" (3/3) ... [2020-10-13 23:30:45,330 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-1.i [2020-10-13 23:30:45,340 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:30:45,347 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:30:45,358 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:30:45,379 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:30:45,379 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:30:45,380 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:30:45,380 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:30:45,380 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:30:45,380 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:30:45,380 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:30:45,380 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:30:45,397 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-10-13 23:30:45,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 23:30:45,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:45,404 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] [2020-10-13 23:30:45,404 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:45,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:45,408 INFO L82 PathProgramCache]: Analyzing trace with hash 661673386, now seen corresponding path program 1 times [2020-10-13 23:30:45,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:45,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523353158] [2020-10-13 23:30:45,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:45,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:45,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:45,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:45,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:45,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:45,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:45,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:45,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:46,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:47,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:47,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:30:47,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:30:47,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1822 [2020-10-13 23:30:47,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:47,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:47,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:47,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:30:47,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:47,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:30:47,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:47,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:47,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:47,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:47,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:47,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:30:47,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:47,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:47,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:47,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:47,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:47,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:30:47,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523353158] [2020-10-13 23:30:47,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:30:47,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:30:47,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381597730] [2020-10-13 23:30:47,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:30:47,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:47,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:30:47,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:30:47,477 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 3 states. [2020-10-13 23:30:47,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:47,649 INFO L93 Difference]: Finished difference Result 88 states and 127 transitions. [2020-10-13 23:30:47,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:30:47,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-13 23:30:47,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:47,661 INFO L225 Difference]: With dead ends: 88 [2020-10-13 23:30:47,661 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 23:30:47,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:30:47,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 23:30:47,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 23:30:47,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 23:30:47,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-10-13 23:30:47,710 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2020-10-13 23:30:47,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:47,710 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-10-13 23:30:47,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:30:47,710 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-10-13 23:30:47,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 23:30:47,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:47,712 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] [2020-10-13 23:30:47,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:30:47,713 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:47,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:47,713 INFO L82 PathProgramCache]: Analyzing trace with hash 904564754, now seen corresponding path program 1 times [2020-10-13 23:30:47,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:47,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275354539] [2020-10-13 23:30:47,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:47,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:47,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:47,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:47,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:47,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:47,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:47,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:47,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:48,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:52,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:52,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 23:30:52,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:30:52,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:30:52,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:52,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:52,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:30:52,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 23:30:52,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:30:52,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:52,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:52,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:52,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:52,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:52,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:52,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:30:52,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:52,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:52,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:52,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:52,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:52,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:30:52,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275354539] [2020-10-13 23:30:52,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:30:52,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:30:52,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915356077] [2020-10-13 23:30:52,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:30:52,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:52,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:30:52,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:30:52,792 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2020-10-13 23:30:52,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:52,988 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2020-10-13 23:30:52,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:30:52,989 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-13 23:30:52,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:52,990 INFO L225 Difference]: With dead ends: 91 [2020-10-13 23:30:52,990 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 23:30:52,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:30:52,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 23:30:53,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-10-13 23:30:53,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 23:30:53,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-10-13 23:30:53,012 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 29 [2020-10-13 23:30:53,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:53,013 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-10-13 23:30:53,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:30:53,014 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-10-13 23:30:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 23:30:53,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:53,017 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, 1, 1, 1, 1] [2020-10-13 23:30:53,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:30:53,018 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:53,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:53,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1500275198, now seen corresponding path program 1 times [2020-10-13 23:30:53,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:53,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729557022] [2020-10-13 23:30:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:53,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:53,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:53,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:53,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:53,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:53,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:53,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:56,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:58,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:58,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 23:30:58,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:30:58,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:30:58,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:58,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:58,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:30:58,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:30:58,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:30:58,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:58,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:58,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:58,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:58,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:58,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:58,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:30:58,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:58,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:58,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:58,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:58,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:58,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 23:30:58,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729557022] [2020-10-13 23:30:58,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:30:58,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:30:58,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516605226] [2020-10-13 23:30:58,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:30:58,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:58,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:30:58,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:30:58,089 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 4 states. [2020-10-13 23:30:58,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:58,198 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2020-10-13 23:30:58,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:30:58,199 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-13 23:30:58,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:58,200 INFO L225 Difference]: With dead ends: 96 [2020-10-13 23:30:58,200 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 23:30:58,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:30:58,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 23:30:58,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-13 23:30:58,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:30:58,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2020-10-13 23:30:58,209 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 45 [2020-10-13 23:30:58,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:58,209 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2020-10-13 23:30:58,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:30:58,210 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2020-10-13 23:30:58,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 23:30:58,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:58,211 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, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:58,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:30:58,212 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:58,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:58,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1518385952, now seen corresponding path program 1 times [2020-10-13 23:30:58,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:58,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68173395] [2020-10-13 23:30:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:58,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:58,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:58,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:58,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:58,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:58,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:58,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:59,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:03,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:03,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:31:03,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:31:03,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:31:03,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:03,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:03,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:31:03,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 23:31:03,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:31:03,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:31:03,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:03,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:03,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:03,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:03,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:03,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:03,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:03,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:03,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:03,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:03,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:03,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 23:31:03,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68173395] [2020-10-13 23:31:03,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:03,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:31:03,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641717512] [2020-10-13 23:31:03,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:31:03,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:03,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:31:03,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:31:03,285 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 5 states. [2020-10-13 23:31:03,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:03,562 INFO L93 Difference]: Finished difference Result 115 states and 139 transitions. [2020-10-13 23:31:03,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:31:03,563 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-13 23:31:03,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:03,564 INFO L225 Difference]: With dead ends: 115 [2020-10-13 23:31:03,564 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 23:31:03,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:31:03,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 23:31:03,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2020-10-13 23:31:03,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 23:31:03,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-10-13 23:31:03,583 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 47 [2020-10-13 23:31:03,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:03,585 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-10-13 23:31:03,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:31:03,585 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-10-13 23:31:03,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 23:31:03,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:03,588 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1] [2020-10-13 23:31:03,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:31:03,588 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:03,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:03,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1887654640, now seen corresponding path program 2 times [2020-10-13 23:31:03,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:03,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370393161] [2020-10-13 23:31:03,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:03,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:03,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:03,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:03,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:03,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:03,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:04,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:08,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:08,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 23:31:08,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:31:08,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:31:08,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:08,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:08,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:31:08,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 23:31:08,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:31:08,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:08,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:08,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:08,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:08,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:08,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:08,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:08,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:08,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:08,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:08,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:08,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:08,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-13 23:31:08,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370393161] [2020-10-13 23:31:08,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:08,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:31:08,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596730954] [2020-10-13 23:31:08,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:31:08,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:08,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:31:08,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:31:08,670 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 6 states. [2020-10-13 23:31:08,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:08,900 INFO L93 Difference]: Finished difference Result 145 states and 169 transitions. [2020-10-13 23:31:08,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:31:08,900 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-10-13 23:31:08,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:08,902 INFO L225 Difference]: With dead ends: 145 [2020-10-13 23:31:08,902 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 23:31:08,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:31:08,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 23:31:08,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-10-13 23:31:08,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 23:31:08,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2020-10-13 23:31:08,912 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 63 [2020-10-13 23:31:08,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:08,912 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2020-10-13 23:31:08,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:31:08,913 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2020-10-13 23:31:08,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 23:31:08,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:08,914 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1] [2020-10-13 23:31:08,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:31:08,915 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:08,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:08,915 INFO L82 PathProgramCache]: Analyzing trace with hash 364216064, now seen corresponding path program 3 times [2020-10-13 23:31:08,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:08,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043975880] [2020-10-13 23:31:08,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:08,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:08,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:08,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:08,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:08,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:09,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:12,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:13,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:13,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 23:31:13,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:31:13,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:31:13,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:13,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:13,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:31:13,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:13,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:31:13,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:13,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:13,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:13,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:13,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:13,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:13,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:31:13,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:13,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:13,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:13,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:13,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:13,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 23:31:13,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043975880] [2020-10-13 23:31:13,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:13,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:31:13,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063074714] [2020-10-13 23:31:13,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:31:13,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:13,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:31:13,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:31:13,999 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand 5 states. [2020-10-13 23:31:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:14,098 INFO L93 Difference]: Finished difference Result 162 states and 180 transitions. [2020-10-13 23:31:14,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:31:14,099 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-13 23:31:14,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:14,100 INFO L225 Difference]: With dead ends: 162 [2020-10-13 23:31:14,100 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 23:31:14,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:31:14,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 23:31:14,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-13 23:31:14,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 23:31:14,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2020-10-13 23:31:14,109 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 79 [2020-10-13 23:31:14,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:14,110 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2020-10-13 23:31:14,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:31:14,110 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2020-10-13 23:31:14,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 23:31:14,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:14,111 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:14,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:31:14,112 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:14,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:14,112 INFO L82 PathProgramCache]: Analyzing trace with hash 696374430, now seen corresponding path program 4 times [2020-10-13 23:31:14,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:14,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833060129] [2020-10-13 23:31:14,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:14,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:14,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:14,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:14,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:14,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:14,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:16,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:19,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:19,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 23:31:19,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:31:19,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:31:19,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:19,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:19,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:31:19,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:31:19,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:31:19,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:19,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:19,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:19,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:19,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:19,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:19,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:19,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:19,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:19,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:19,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:19,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:19,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-10-13 23:31:19,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833060129] [2020-10-13 23:31:19,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:19,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:31:19,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442049203] [2020-10-13 23:31:19,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:31:19,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:19,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:31:19,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:19,198 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 7 states. [2020-10-13 23:31:19,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:19,498 INFO L93 Difference]: Finished difference Result 177 states and 201 transitions. [2020-10-13 23:31:19,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:31:19,498 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2020-10-13 23:31:19,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:19,499 INFO L225 Difference]: With dead ends: 177 [2020-10-13 23:31:19,499 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 23:31:19,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:19,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 23:31:19,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2020-10-13 23:31:19,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 23:31:19,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2020-10-13 23:31:19,515 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 81 [2020-10-13 23:31:19,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:19,515 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2020-10-13 23:31:19,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:31:19,516 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2020-10-13 23:31:19,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 23:31:19,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:19,520 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-10-13 23:31:19,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:31:19,520 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:19,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:19,521 INFO L82 PathProgramCache]: Analyzing trace with hash 637831822, now seen corresponding path program 5 times [2020-10-13 23:31:19,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:19,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682805640] [2020-10-13 23:31:19,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:19,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:19,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:19,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:19,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:19,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:19,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:24,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:24,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 23:31:24,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:24,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:31:24,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:24,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:24,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:31:24,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:24,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:31:24,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:24,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:24,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:24,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:24,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:24,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:24,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:24,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:24,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:24,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:24,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:24,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:24,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-13 23:31:24,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682805640] [2020-10-13 23:31:24,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:24,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:31:24,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727837130] [2020-10-13 23:31:24,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:31:24,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:24,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:31:24,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:31:24,616 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand 6 states. [2020-10-13 23:31:24,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:24,714 INFO L93 Difference]: Finished difference Result 196 states and 214 transitions. [2020-10-13 23:31:24,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:31:24,715 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2020-10-13 23:31:24,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:24,716 INFO L225 Difference]: With dead ends: 196 [2020-10-13 23:31:24,716 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 23:31:24,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:31:24,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 23:31:24,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-13 23:31:24,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 23:31:24,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 113 transitions. [2020-10-13 23:31:24,737 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 113 transitions. Word has length 97 [2020-10-13 23:31:24,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:24,737 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 113 transitions. [2020-10-13 23:31:24,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:31:24,738 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 113 transitions. [2020-10-13 23:31:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 23:31:24,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:24,741 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:24,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:31:24,744 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:24,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:24,745 INFO L82 PathProgramCache]: Analyzing trace with hash -529664852, now seen corresponding path program 6 times [2020-10-13 23:31:24,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:24,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144585225] [2020-10-13 23:31:24,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:24,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:24,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:24,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:24,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:24,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:25,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:29,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:29,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 23:31:29,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:29,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 23:31:29,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:29,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:29,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:31:29,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:31:29,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:31:29,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:29,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:29,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:29,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:29,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:29,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:29,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:29,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:29,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:29,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:29,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:29,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:29,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 23:31:29,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144585225] [2020-10-13 23:31:29,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:29,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:31:29,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914215086] [2020-10-13 23:31:29,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:31:29,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:29,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:31:29,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:31:29,861 INFO L87 Difference]: Start difference. First operand 104 states and 113 transitions. Second operand 8 states. [2020-10-13 23:31:30,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:30,250 INFO L93 Difference]: Finished difference Result 209 states and 233 transitions. [2020-10-13 23:31:30,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:31:30,251 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2020-10-13 23:31:30,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:30,253 INFO L225 Difference]: With dead ends: 209 [2020-10-13 23:31:30,253 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 23:31:30,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:31:30,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 23:31:30,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-10-13 23:31:30,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 23:31:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2020-10-13 23:31:30,274 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 99 [2020-10-13 23:31:30,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:30,275 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2020-10-13 23:31:30,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:31:30,275 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2020-10-13 23:31:30,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 23:31:30,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:30,276 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2020-10-13 23:31:30,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:31:30,277 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:30,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:30,278 INFO L82 PathProgramCache]: Analyzing trace with hash 309956252, now seen corresponding path program 7 times [2020-10-13 23:31:30,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:30,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138807620] [2020-10-13 23:31:30,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:30,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:30,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:30,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:30,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:30,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:30,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:35,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:35,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 23:31:35,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:35,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 23:31:35,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:35,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:35,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:31:35,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:31:35,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:31:35,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:35,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:35,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:35,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:35,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:35,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:35,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:35,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:35,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:35,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:35,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:35,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:35,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-10-13 23:31:35,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138807620] [2020-10-13 23:31:35,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:35,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:31:35,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852488460] [2020-10-13 23:31:35,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:31:35,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:35,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:31:35,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:31:35,420 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand 9 states. [2020-10-13 23:31:35,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:35,763 INFO L93 Difference]: Finished difference Result 239 states and 263 transitions. [2020-10-13 23:31:35,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:31:35,764 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 115 [2020-10-13 23:31:35,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:35,765 INFO L225 Difference]: With dead ends: 239 [2020-10-13 23:31:35,765 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 23:31:35,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:31:35,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 23:31:35,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 136. [2020-10-13 23:31:35,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 23:31:35,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 145 transitions. [2020-10-13 23:31:35,778 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 145 transitions. Word has length 115 [2020-10-13 23:31:35,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:35,779 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 145 transitions. [2020-10-13 23:31:35,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:31:35,779 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 145 transitions. [2020-10-13 23:31:35,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 23:31:35,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:35,780 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2020-10-13 23:31:35,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:31:35,781 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:35,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:35,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1194461324, now seen corresponding path program 8 times [2020-10-13 23:31:35,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:35,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317369842] [2020-10-13 23:31:35,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:35,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:35,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:35,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:35,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:35,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:36,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:40,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:40,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 23:31:40,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:40,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-13 23:31:40,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:40,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:40,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:31:40,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:40,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:31:40,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:40,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:40,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:40,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:40,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:40,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:40,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:40,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:40,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:40,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:40,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:40,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:40,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-13 23:31:40,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317369842] [2020-10-13 23:31:40,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:40,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:31:40,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290148400] [2020-10-13 23:31:40,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:31:40,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:40,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:31:40,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:40,918 INFO L87 Difference]: Start difference. First operand 136 states and 145 transitions. Second operand 7 states. [2020-10-13 23:31:41,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:41,020 INFO L93 Difference]: Finished difference Result 262 states and 280 transitions. [2020-10-13 23:31:41,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:31:41,020 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2020-10-13 23:31:41,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:41,021 INFO L225 Difference]: With dead ends: 262 [2020-10-13 23:31:41,022 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 23:31:41,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:41,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 23:31:41,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-10-13 23:31:41,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 23:31:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 147 transitions. [2020-10-13 23:31:41,028 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 147 transitions. Word has length 131 [2020-10-13 23:31:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:41,028 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 147 transitions. [2020-10-13 23:31:41,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:31:41,028 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 147 transitions. [2020-10-13 23:31:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-13 23:31:41,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:41,030 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2020-10-13 23:31:41,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:31:41,030 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:41,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:41,031 INFO L82 PathProgramCache]: Analyzing trace with hash -198743254, now seen corresponding path program 9 times [2020-10-13 23:31:41,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:41,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762763969] [2020-10-13 23:31:41,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:41,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:41,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:41,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:41,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:41,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:41,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:46,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:46,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-13 23:31:46,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:46,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:31:46,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:46,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:46,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:31:46,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:31:46,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:31:46,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:46,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:46,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:46,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:46,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:46,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:46,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:46,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:46,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:46,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:46,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:46,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:46,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-10-13 23:31:46,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762763969] [2020-10-13 23:31:46,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:46,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:31:46,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208647381] [2020-10-13 23:31:46,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:31:46,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:46,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:31:46,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:31:46,146 INFO L87 Difference]: Start difference. First operand 138 states and 147 transitions. Second operand 10 states. [2020-10-13 23:31:46,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:46,499 INFO L93 Difference]: Finished difference Result 271 states and 295 transitions. [2020-10-13 23:31:46,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:31:46,500 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-10-13 23:31:46,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:46,501 INFO L225 Difference]: With dead ends: 271 [2020-10-13 23:31:46,501 INFO L226 Difference]: Without dead ends: 162 [2020-10-13 23:31:46,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:31:46,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-13 23:31:46,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 154. [2020-10-13 23:31:46,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 23:31:46,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 163 transitions. [2020-10-13 23:31:46,509 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 163 transitions. Word has length 133 [2020-10-13 23:31:46,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:46,509 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 163 transitions. [2020-10-13 23:31:46,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:31:46,509 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 163 transitions. [2020-10-13 23:31:46,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-13 23:31:46,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:46,511 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2020-10-13 23:31:46,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:31:46,511 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:46,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:46,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1428174566, now seen corresponding path program 10 times [2020-10-13 23:31:46,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:46,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262721349] [2020-10-13 23:31:46,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:46,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:46,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:46,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:46,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:46,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:46,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:51,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:51,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-13 23:31:51,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:51,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-13 23:31:51,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:51,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:51,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:31:51,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:51,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:31:51,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:51,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:51,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:51,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:51,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:51,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:51,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:51,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:51,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:51,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:51,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:51,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:51,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-13 23:31:51,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262721349] [2020-10-13 23:31:51,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:51,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:31:51,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933920999] [2020-10-13 23:31:51,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:31:51,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:51,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:31:51,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:31:51,648 INFO L87 Difference]: Start difference. First operand 154 states and 163 transitions. Second operand 8 states. [2020-10-13 23:31:51,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:51,803 INFO L93 Difference]: Finished difference Result 296 states and 314 transitions. [2020-10-13 23:31:51,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:31:51,803 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 149 [2020-10-13 23:31:51,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:51,805 INFO L225 Difference]: With dead ends: 296 [2020-10-13 23:31:51,805 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 23:31:51,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:31:51,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 23:31:51,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-10-13 23:31:51,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 23:31:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 165 transitions. [2020-10-13 23:31:51,813 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 165 transitions. Word has length 149 [2020-10-13 23:31:51,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:51,813 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 165 transitions. [2020-10-13 23:31:51,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:31:51,813 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 165 transitions. [2020-10-13 23:31:51,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 23:31:51,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:51,815 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:51,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:31:51,815 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:51,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:51,816 INFO L82 PathProgramCache]: Analyzing trace with hash 220790840, now seen corresponding path program 11 times [2020-10-13 23:31:51,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:51,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485453234] [2020-10-13 23:31:51,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:51,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:51,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:51,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:51,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:51,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:52,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:56,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:56,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-13 23:31:56,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:56,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:31:56,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:56,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:56,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:31:56,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 23:31:56,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:31:56,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:56,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:56,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:56,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:56,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:56,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:56,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:56,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:56,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:56,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:56,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:56,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:56,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:56,942 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-10-13 23:31:56,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485453234] [2020-10-13 23:31:56,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:56,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:31:56,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140412135] [2020-10-13 23:31:56,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:31:56,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:56,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:31:56,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:31:56,944 INFO L87 Difference]: Start difference. First operand 156 states and 165 transitions. Second operand 11 states. [2020-10-13 23:31:57,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:57,374 INFO L93 Difference]: Finished difference Result 303 states and 327 transitions. [2020-10-13 23:31:57,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:31:57,375 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 151 [2020-10-13 23:31:57,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:57,377 INFO L225 Difference]: With dead ends: 303 [2020-10-13 23:31:57,377 INFO L226 Difference]: Without dead ends: 180 [2020-10-13 23:31:57,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:31:57,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-13 23:31:57,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2020-10-13 23:31:57,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 23:31:57,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 181 transitions. [2020-10-13 23:31:57,385 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 181 transitions. Word has length 151 [2020-10-13 23:31:57,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:57,386 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 181 transitions. [2020-10-13 23:31:57,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:31:57,386 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 181 transitions. [2020-10-13 23:31:57,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-13 23:31:57,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:57,388 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2020-10-13 23:31:57,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:31:57,390 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:57,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:57,391 INFO L82 PathProgramCache]: Analyzing trace with hash 530596392, now seen corresponding path program 12 times [2020-10-13 23:31:57,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:57,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945271517] [2020-10-13 23:31:57,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:57,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:57,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:57,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:57,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:57,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:58,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:02,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:02,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-13 23:32:02,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:32:02,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:32:02,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:02,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:02,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:32:02,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:02,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:32:02,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:02,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:02,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:02,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:02,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:02,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:02,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:02,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:02,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:02,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:02,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:02,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:02,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-10-13 23:32:02,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945271517] [2020-10-13 23:32:02,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:02,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:32:02,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019995200] [2020-10-13 23:32:02,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:32:02,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:02,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:32:02,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:32:02,492 INFO L87 Difference]: Start difference. First operand 172 states and 181 transitions. Second operand 9 states. [2020-10-13 23:32:02,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:02,625 INFO L93 Difference]: Finished difference Result 330 states and 348 transitions. [2020-10-13 23:32:02,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:32:02,625 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 167 [2020-10-13 23:32:02,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:02,627 INFO L225 Difference]: With dead ends: 330 [2020-10-13 23:32:02,627 INFO L226 Difference]: Without dead ends: 175 [2020-10-13 23:32:02,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:32:02,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-13 23:32:02,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2020-10-13 23:32:02,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-13 23:32:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 183 transitions. [2020-10-13 23:32:02,636 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 183 transitions. Word has length 167 [2020-10-13 23:32:02,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:02,636 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 183 transitions. [2020-10-13 23:32:02,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:32:02,636 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 183 transitions. [2020-10-13 23:32:02,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-13 23:32:02,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:02,638 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2020-10-13 23:32:02,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:32:02,638 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:02,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:02,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1767821882, now seen corresponding path program 13 times [2020-10-13 23:32:02,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:02,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646290243] [2020-10-13 23:32:02,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:02,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:02,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:02,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:02,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:02,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:03,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:07,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:07,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-13 23:32:07,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:32:07,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 23:32:07,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:07,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:07,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:32:07,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 23:32:07,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:32:07,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:07,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:07,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:07,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:07,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:07,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:07,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:07,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:07,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:07,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:07,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:07,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:07,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-13 23:32:07,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646290243] [2020-10-13 23:32:07,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:07,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:32:07,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849728664] [2020-10-13 23:32:07,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:32:07,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:07,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:32:07,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:32:07,775 INFO L87 Difference]: Start difference. First operand 174 states and 183 transitions. Second operand 12 states. [2020-10-13 23:32:08,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:08,212 INFO L93 Difference]: Finished difference Result 335 states and 359 transitions. [2020-10-13 23:32:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:32:08,212 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 169 [2020-10-13 23:32:08,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:08,213 INFO L225 Difference]: With dead ends: 335 [2020-10-13 23:32:08,213 INFO L226 Difference]: Without dead ends: 198 [2020-10-13 23:32:08,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:32:08,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-13 23:32:08,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 190. [2020-10-13 23:32:08,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-13 23:32:08,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 199 transitions. [2020-10-13 23:32:08,221 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 199 transitions. Word has length 169 [2020-10-13 23:32:08,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:08,221 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 199 transitions. [2020-10-13 23:32:08,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:32:08,222 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 199 transitions. [2020-10-13 23:32:08,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-13 23:32:08,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:08,223 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2020-10-13 23:32:08,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:32:08,224 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:08,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:08,224 INFO L82 PathProgramCache]: Analyzing trace with hash 14046134, now seen corresponding path program 14 times [2020-10-13 23:32:08,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:08,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424681336] [2020-10-13 23:32:08,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:08,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:08,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:08,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:08,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:08,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:09,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:13,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:13,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-13 23:32:13,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:32:13,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 23:32:13,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:13,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:13,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:32:13,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 23:32:13,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:32:13,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:13,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:13,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:13,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:13,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:13,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:13,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:13,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:13,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:13,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:13,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:13,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:13,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:13,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:13,383 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 603 trivial. 0 not checked. [2020-10-13 23:32:13,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424681336] [2020-10-13 23:32:13,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:13,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:32:13,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366559751] [2020-10-13 23:32:13,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:32:13,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:13,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:32:13,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:13,385 INFO L87 Difference]: Start difference. First operand 190 states and 199 transitions. Second operand 13 states. [2020-10-13 23:32:13,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:13,830 INFO L93 Difference]: Finished difference Result 365 states and 389 transitions. [2020-10-13 23:32:13,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:32:13,831 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 185 [2020-10-13 23:32:13,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:13,832 INFO L225 Difference]: With dead ends: 365 [2020-10-13 23:32:13,832 INFO L226 Difference]: Without dead ends: 214 [2020-10-13 23:32:13,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:13,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-13 23:32:13,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 206. [2020-10-13 23:32:13,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-13 23:32:13,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 215 transitions. [2020-10-13 23:32:13,852 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 215 transitions. Word has length 185 [2020-10-13 23:32:13,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:13,852 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 215 transitions. [2020-10-13 23:32:13,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:32:13,853 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 215 transitions. [2020-10-13 23:32:13,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-13 23:32:13,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:13,858 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2020-10-13 23:32:13,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:32:13,858 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:13,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:13,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1239393882, now seen corresponding path program 15 times [2020-10-13 23:32:13,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:13,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925551005] [2020-10-13 23:32:13,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:13,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:13,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:13,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:14,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:14,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:15,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:18,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:18,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-13 23:32:18,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:32:18,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-13 23:32:18,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:18,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:18,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:32:18,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:18,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:32:18,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:19,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:19,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:19,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:19,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:19,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:19,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:19,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:19,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:19,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:19,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:19,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:19,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-10-13 23:32:19,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925551005] [2020-10-13 23:32:19,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:19,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:32:19,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213064806] [2020-10-13 23:32:19,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:32:19,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:19,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:32:19,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:32:19,030 INFO L87 Difference]: Start difference. First operand 206 states and 215 transitions. Second operand 10 states. [2020-10-13 23:32:19,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:19,152 INFO L93 Difference]: Finished difference Result 396 states and 414 transitions. [2020-10-13 23:32:19,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:32:19,153 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 201 [2020-10-13 23:32:19,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:19,154 INFO L225 Difference]: With dead ends: 396 [2020-10-13 23:32:19,155 INFO L226 Difference]: Without dead ends: 209 [2020-10-13 23:32:19,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:32:19,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-13 23:32:19,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2020-10-13 23:32:19,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-13 23:32:19,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 217 transitions. [2020-10-13 23:32:19,165 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 217 transitions. Word has length 201 [2020-10-13 23:32:19,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:19,165 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 217 transitions. [2020-10-13 23:32:19,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:32:19,165 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 217 transitions. [2020-10-13 23:32:19,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-13 23:32:19,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:19,167 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:19,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:32:19,167 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:19,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:19,168 INFO L82 PathProgramCache]: Analyzing trace with hash -554902076, now seen corresponding path program 16 times [2020-10-13 23:32:19,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:19,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542253773] [2020-10-13 23:32:19,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:19,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:19,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:19,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:19,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:19,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:20,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:24,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:24,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-13 23:32:24,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:32:24,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-13 23:32:24,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:24,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:24,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:32:24,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:32:24,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:32:24,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:24,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:24,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:24,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:24,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:24,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:24,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:24,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:24,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:24,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:24,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:24,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:24,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 749 trivial. 0 not checked. [2020-10-13 23:32:24,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542253773] [2020-10-13 23:32:24,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:24,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:32:24,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469516047] [2020-10-13 23:32:24,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:32:24,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:24,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:32:24,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:32:24,425 INFO L87 Difference]: Start difference. First operand 208 states and 217 transitions. Second operand 14 states. [2020-10-13 23:32:24,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:24,919 INFO L93 Difference]: Finished difference Result 397 states and 421 transitions. [2020-10-13 23:32:24,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:32:24,920 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 203 [2020-10-13 23:32:24,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:24,922 INFO L225 Difference]: With dead ends: 397 [2020-10-13 23:32:24,922 INFO L226 Difference]: Without dead ends: 232 [2020-10-13 23:32:24,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:32:24,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-13 23:32:24,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2020-10-13 23:32:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-13 23:32:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 233 transitions. [2020-10-13 23:32:24,932 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 233 transitions. Word has length 203 [2020-10-13 23:32:24,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:24,933 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 233 transitions. [2020-10-13 23:32:24,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:32:24,933 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 233 transitions. [2020-10-13 23:32:24,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-13 23:32:24,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:24,935 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:24,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:32:24,935 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:24,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:24,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1261160372, now seen corresponding path program 17 times [2020-10-13 23:32:24,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:24,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467217497] [2020-10-13 23:32:24,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:24,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:24,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:25,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:25,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:25,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:26,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:30,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:30,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-13 23:32:30,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:32:30,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5167 [2020-10-13 23:32:30,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:30,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:30,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:32:30,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:30,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:32:30,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:30,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:30,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:30,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:30,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:30,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:30,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:30,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:30,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:30,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:30,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:30,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:30,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:30,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2020-10-13 23:32:30,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467217497] [2020-10-13 23:32:30,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:30,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:32:30,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548785805] [2020-10-13 23:32:30,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:32:30,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:30,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:32:30,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:32:30,230 INFO L87 Difference]: Start difference. First operand 224 states and 233 transitions. Second operand 11 states. [2020-10-13 23:32:30,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:30,379 INFO L93 Difference]: Finished difference Result 430 states and 448 transitions. [2020-10-13 23:32:30,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:32:30,380 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 219 [2020-10-13 23:32:30,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:30,381 INFO L225 Difference]: With dead ends: 430 [2020-10-13 23:32:30,382 INFO L226 Difference]: Without dead ends: 227 [2020-10-13 23:32:30,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:32:30,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-13 23:32:30,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2020-10-13 23:32:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-13 23:32:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 235 transitions. [2020-10-13 23:32:30,391 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 235 transitions. Word has length 219 [2020-10-13 23:32:30,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:30,392 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 235 transitions. [2020-10-13 23:32:30,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:32:30,392 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 235 transitions. [2020-10-13 23:32:30,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-13 23:32:30,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:30,393 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:30,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:32:30,394 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:30,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:30,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1297530962, now seen corresponding path program 18 times [2020-10-13 23:32:30,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:30,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707003062] [2020-10-13 23:32:30,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:30,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:30,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:30,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:30,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:30,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:32,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:35,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:35,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-13 23:32:35,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:32:35,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:32:35,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:35,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:35,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:32:35,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 23:32:35,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:32:35,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:35,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:35,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:35,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:35,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:35,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:35,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:35,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:35,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:35,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:35,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:35,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:35,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:35,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 911 trivial. 0 not checked. [2020-10-13 23:32:35,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707003062] [2020-10-13 23:32:35,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:35,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:32:35,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525173144] [2020-10-13 23:32:35,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:32:35,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:35,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:32:35,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:32:35,594 INFO L87 Difference]: Start difference. First operand 226 states and 235 transitions. Second operand 15 states. [2020-10-13 23:32:36,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:36,091 INFO L93 Difference]: Finished difference Result 429 states and 453 transitions. [2020-10-13 23:32:36,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:32:36,091 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 221 [2020-10-13 23:32:36,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:36,094 INFO L225 Difference]: With dead ends: 429 [2020-10-13 23:32:36,094 INFO L226 Difference]: Without dead ends: 250 [2020-10-13 23:32:36,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:32:36,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-13 23:32:36,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 242. [2020-10-13 23:32:36,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-13 23:32:36,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 251 transitions. [2020-10-13 23:32:36,111 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 251 transitions. Word has length 221 [2020-10-13 23:32:36,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:36,113 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 251 transitions. [2020-10-13 23:32:36,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:32:36,113 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 251 transitions. [2020-10-13 23:32:36,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-13 23:32:36,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:36,116 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:36,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:32:36,117 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:36,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:36,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1492545982, now seen corresponding path program 19 times [2020-10-13 23:32:36,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:36,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077547029] [2020-10-13 23:32:36,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:36,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:36,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:36,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:36,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:36,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:38,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:41,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:41,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-13 23:32:41,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:32:41,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5152 [2020-10-13 23:32:41,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:41,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:41,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:32:41,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-13 23:32:41,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:32:41,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:41,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:41,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:41,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:41,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:41,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:41,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:41,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:41,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:41,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:41,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:41,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:41,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2020-10-13 23:32:41,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077547029] [2020-10-13 23:32:41,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:41,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:32:41,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488298918] [2020-10-13 23:32:41,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:32:41,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:41,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:32:41,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:32:41,501 INFO L87 Difference]: Start difference. First operand 242 states and 251 transitions. Second operand 16 states. [2020-10-13 23:32:42,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:42,094 INFO L93 Difference]: Finished difference Result 459 states and 483 transitions. [2020-10-13 23:32:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:32:42,097 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 237 [2020-10-13 23:32:42,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:42,099 INFO L225 Difference]: With dead ends: 459 [2020-10-13 23:32:42,099 INFO L226 Difference]: Without dead ends: 266 [2020-10-13 23:32:42,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:32:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-13 23:32:42,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 258. [2020-10-13 23:32:42,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-13 23:32:42,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 267 transitions. [2020-10-13 23:32:42,109 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 267 transitions. Word has length 237 [2020-10-13 23:32:42,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:42,109 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 267 transitions. [2020-10-13 23:32:42,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:32:42,109 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 267 transitions. [2020-10-13 23:32:42,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-13 23:32:42,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:42,111 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:42,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:32:42,111 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:42,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:42,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1254015950, now seen corresponding path program 20 times [2020-10-13 23:32:42,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:42,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637939341] [2020-10-13 23:32:42,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:42,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:42,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:42,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:42,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:42,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:45,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:47,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:47,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-13 23:32:47,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:32:47,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5122 [2020-10-13 23:32:47,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:47,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:47,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:32:47,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:47,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:32:47,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:47,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:47,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:47,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:47,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:47,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:47,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:47,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:47,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:47,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:47,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:47,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:47,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2020-10-13 23:32:47,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637939341] [2020-10-13 23:32:47,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:47,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:32:47,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920065069] [2020-10-13 23:32:47,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:32:47,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:47,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:32:47,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:32:47,371 INFO L87 Difference]: Start difference. First operand 258 states and 267 transitions. Second operand 12 states. [2020-10-13 23:32:47,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:47,508 INFO L93 Difference]: Finished difference Result 496 states and 514 transitions. [2020-10-13 23:32:47,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:32:47,509 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 253 [2020-10-13 23:32:47,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:47,510 INFO L225 Difference]: With dead ends: 496 [2020-10-13 23:32:47,510 INFO L226 Difference]: Without dead ends: 261 [2020-10-13 23:32:47,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:32:47,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-13 23:32:47,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 260. [2020-10-13 23:32:47,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-13 23:32:47,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 269 transitions. [2020-10-13 23:32:47,519 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 269 transitions. Word has length 253 [2020-10-13 23:32:47,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:47,520 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 269 transitions. [2020-10-13 23:32:47,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:32:47,520 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 269 transitions. [2020-10-13 23:32:47,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-13 23:32:47,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:47,522 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:47,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:32:47,522 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:47,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:47,522 INFO L82 PathProgramCache]: Analyzing trace with hash 544509264, now seen corresponding path program 21 times [2020-10-13 23:32:47,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:47,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161694605] [2020-10-13 23:32:47,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:47,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:47,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:47,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:47,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:47,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:51,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:52,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:52,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-13 23:32:52,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:32:52,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5083 [2020-10-13 23:32:52,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:52,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:52,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:32:52,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-13 23:32:52,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:32:52,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:52,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:52,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:52,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:52,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:52,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:52,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:52,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:52,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:52,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:52,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:52,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:52,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1264 trivial. 0 not checked. [2020-10-13 23:32:52,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161694605] [2020-10-13 23:32:52,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:52,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:32:52,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449911220] [2020-10-13 23:32:52,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:32:52,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:52,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:32:52,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:32:52,841 INFO L87 Difference]: Start difference. First operand 260 states and 269 transitions. Second operand 17 states. [2020-10-13 23:32:53,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:53,455 INFO L93 Difference]: Finished difference Result 491 states and 515 transitions. [2020-10-13 23:32:53,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:32:53,456 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 255 [2020-10-13 23:32:53,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:53,458 INFO L225 Difference]: With dead ends: 491 [2020-10-13 23:32:53,458 INFO L226 Difference]: Without dead ends: 284 [2020-10-13 23:32:53,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:32:53,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-13 23:32:53,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 276. [2020-10-13 23:32:53,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-13 23:32:53,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 285 transitions. [2020-10-13 23:32:53,468 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 285 transitions. Word has length 255 [2020-10-13 23:32:53,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:53,468 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 285 transitions. [2020-10-13 23:32:53,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:32:53,468 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 285 transitions. [2020-10-13 23:32:53,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-13 23:32:53,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:53,470 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:53,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:32:53,471 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:53,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:53,471 INFO L82 PathProgramCache]: Analyzing trace with hash -170451136, now seen corresponding path program 22 times [2020-10-13 23:32:53,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:53,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100431867] [2020-10-13 23:32:53,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:53,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:53,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:53,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:53,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:53,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:58,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:58,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 279 [2020-10-13 23:32:58,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:58,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-13 23:32:58,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:58,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:58,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:32:58,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:58,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:32:58,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:58,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:58,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:58,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:58,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:58,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:58,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:58,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:58,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:58,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:58,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:58,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:58,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:58,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1649 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2020-10-13 23:32:58,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100431867] [2020-10-13 23:32:58,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:58,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:32:58,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714953514] [2020-10-13 23:32:58,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:32:58,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:58,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:32:58,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:58,668 INFO L87 Difference]: Start difference. First operand 276 states and 285 transitions. Second operand 13 states. [2020-10-13 23:32:58,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:58,826 INFO L93 Difference]: Finished difference Result 530 states and 548 transitions. [2020-10-13 23:32:58,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:32:58,827 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 271 [2020-10-13 23:32:58,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:58,828 INFO L225 Difference]: With dead ends: 530 [2020-10-13 23:32:58,829 INFO L226 Difference]: Without dead ends: 279 [2020-10-13 23:32:58,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:58,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-13 23:32:58,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 278. [2020-10-13 23:32:58,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-13 23:32:58,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 287 transitions. [2020-10-13 23:32:58,839 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 287 transitions. Word has length 271 [2020-10-13 23:32:58,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:58,839 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 287 transitions. [2020-10-13 23:32:58,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:32:58,839 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 287 transitions. [2020-10-13 23:32:58,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-10-13 23:32:58,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:58,841 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:58,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:32:58,841 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:58,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:58,842 INFO L82 PathProgramCache]: Analyzing trace with hash 489661662, now seen corresponding path program 23 times [2020-10-13 23:32:58,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:58,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674631996] [2020-10-13 23:32:58,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:58,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:58,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:58,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:58,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:59,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:04,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:04,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-13 23:33:04,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:04,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5283 [2020-10-13 23:33:04,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:04,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:04,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:33:04,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-13 23:33:04,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:33:04,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:04,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:04,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:04,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:04,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:04,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:04,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:04,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:04,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:04,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:04,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:04,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:04,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1668 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1472 trivial. 0 not checked. [2020-10-13 23:33:04,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674631996] [2020-10-13 23:33:04,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:04,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:33:04,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567827045] [2020-10-13 23:33:04,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:33:04,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:04,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:33:04,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:33:04,404 INFO L87 Difference]: Start difference. First operand 278 states and 287 transitions. Second operand 18 states. [2020-10-13 23:33:05,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:05,008 INFO L93 Difference]: Finished difference Result 523 states and 547 transitions. [2020-10-13 23:33:05,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:33:05,009 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 273 [2020-10-13 23:33:05,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:05,011 INFO L225 Difference]: With dead ends: 523 [2020-10-13 23:33:05,011 INFO L226 Difference]: Without dead ends: 302 [2020-10-13 23:33:05,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:33:05,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-10-13 23:33:05,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 294. [2020-10-13 23:33:05,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-13 23:33:05,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 303 transitions. [2020-10-13 23:33:05,025 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 303 transitions. Word has length 273 [2020-10-13 23:33:05,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:05,025 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 303 transitions. [2020-10-13 23:33:05,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:33:05,025 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 303 transitions. [2020-10-13 23:33:05,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-13 23:33:05,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:05,027 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:05,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:33:05,028 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash -356771122, now seen corresponding path program 24 times [2020-10-13 23:33:05,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:05,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144679110] [2020-10-13 23:33:05,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:05,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:05,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:05,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:05,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:05,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:10,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:10,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 297 [2020-10-13 23:33:10,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:10,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5142 [2020-10-13 23:33:10,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:10,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:10,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:33:10,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:10,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:33:10,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:10,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:10,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:10,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:10,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:10,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:10,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:10,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:10,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:10,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:10,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:10,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:10,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:10,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-13 23:33:10,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144679110] [2020-10-13 23:33:10,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:10,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:33:10,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153366977] [2020-10-13 23:33:10,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:33:10,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:10,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:33:10,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:33:10,352 INFO L87 Difference]: Start difference. First operand 294 states and 303 transitions. Second operand 14 states. [2020-10-13 23:33:10,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:10,504 INFO L93 Difference]: Finished difference Result 564 states and 582 transitions. [2020-10-13 23:33:10,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:33:10,505 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 289 [2020-10-13 23:33:10,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:10,507 INFO L225 Difference]: With dead ends: 564 [2020-10-13 23:33:10,507 INFO L226 Difference]: Without dead ends: 297 [2020-10-13 23:33:10,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:33:10,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-13 23:33:10,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 296. [2020-10-13 23:33:10,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-13 23:33:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 305 transitions. [2020-10-13 23:33:10,518 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 305 transitions. Word has length 289 [2020-10-13 23:33:10,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:10,518 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 305 transitions. [2020-10-13 23:33:10,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:33:10,519 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 305 transitions. [2020-10-13 23:33:10,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-13 23:33:10,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:10,521 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:10,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:33:10,521 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:10,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:10,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1610986732, now seen corresponding path program 25 times [2020-10-13 23:33:10,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:10,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014322962] [2020-10-13 23:33:10,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:10,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:10,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:10,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:10,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:10,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:14,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:15,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:15,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-13 23:33:15,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:33:15,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 23:33:15,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:15,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:15,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:33:15,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-10-13 23:33:15,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:33:15,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:15,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:15,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:15,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:15,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:15,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:15,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:33:15,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:15,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:15,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:15,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:15,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:15,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:33:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1921 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1696 trivial. 0 not checked. [2020-10-13 23:33:15,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014322962] [2020-10-13 23:33:15,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:15,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:33:15,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171508441] [2020-10-13 23:33:15,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:33:15,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:15,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:33:15,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:33:15,964 INFO L87 Difference]: Start difference. First operand 296 states and 305 transitions. Second operand 19 states. [2020-10-13 23:33:16,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:16,738 INFO L93 Difference]: Finished difference Result 555 states and 579 transitions. [2020-10-13 23:33:16,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:33:16,739 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 291 [2020-10-13 23:33:16,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:16,740 INFO L225 Difference]: With dead ends: 555 [2020-10-13 23:33:16,740 INFO L226 Difference]: Without dead ends: 320 [2020-10-13 23:33:16,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:33:16,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-13 23:33:16,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 312. [2020-10-13 23:33:16,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-13 23:33:16,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 321 transitions. [2020-10-13 23:33:16,751 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 321 transitions. Word has length 291 [2020-10-13 23:33:16,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:16,751 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 321 transitions. [2020-10-13 23:33:16,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:33:16,751 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 321 transitions. [2020-10-13 23:33:16,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-13 23:33:16,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:16,753 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:16,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:33:16,754 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:16,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:16,754 INFO L82 PathProgramCache]: Analyzing trace with hash 687541980, now seen corresponding path program 26 times [2020-10-13 23:33:16,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:16,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339494148] [2020-10-13 23:33:16,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:16,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:16,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:16,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:17,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:17,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:22,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:22,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-13 23:33:22,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:22,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5292 [2020-10-13 23:33:22,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:22,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:22,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:33:22,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-13 23:33:22,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:33:22,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:22,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:22,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:22,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:22,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:22,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:22,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:22,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:22,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:22,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:22,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:22,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:22,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:33:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2169 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1913 trivial. 0 not checked. [2020-10-13 23:33:22,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339494148] [2020-10-13 23:33:22,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:22,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:33:22,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996499138] [2020-10-13 23:33:22,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:33:22,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:22,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:33:22,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:33:22,469 INFO L87 Difference]: Start difference. First operand 312 states and 321 transitions. Second operand 20 states. [2020-10-13 23:33:23,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:23,267 INFO L93 Difference]: Finished difference Result 585 states and 609 transitions. [2020-10-13 23:33:23,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:33:23,268 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 307 [2020-10-13 23:33:23,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:23,270 INFO L225 Difference]: With dead ends: 585 [2020-10-13 23:33:23,271 INFO L226 Difference]: Without dead ends: 336 [2020-10-13 23:33:23,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:33:23,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-13 23:33:23,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 328. [2020-10-13 23:33:23,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-10-13 23:33:23,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 337 transitions. [2020-10-13 23:33:23,283 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 337 transitions. Word has length 307 [2020-10-13 23:33:23,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:23,283 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 337 transitions. [2020-10-13 23:33:23,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:33:23,283 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 337 transitions. [2020-10-13 23:33:23,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-13 23:33:23,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:23,285 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:23,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:33:23,286 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:23,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:23,286 INFO L82 PathProgramCache]: Analyzing trace with hash 215828684, now seen corresponding path program 27 times [2020-10-13 23:33:23,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:23,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588592120] [2020-10-13 23:33:23,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:23,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:23,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:23,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:23,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:23,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:28,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:28,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-13 23:33:28,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:28,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5132 [2020-10-13 23:33:28,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:28,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:28,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:33:28,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:28,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:33:28,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:28,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:28,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:28,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:28,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:28,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:28,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:28,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:28,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:28,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:28,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:28,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:28,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:28,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2433 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2020-10-13 23:33:28,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588592120] [2020-10-13 23:33:28,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:28,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:33:28,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628321821] [2020-10-13 23:33:28,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:33:28,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:28,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:33:28,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:33:28,685 INFO L87 Difference]: Start difference. First operand 328 states and 337 transitions. Second operand 15 states. [2020-10-13 23:33:28,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:28,839 INFO L93 Difference]: Finished difference Result 630 states and 648 transitions. [2020-10-13 23:33:28,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:33:28,840 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 323 [2020-10-13 23:33:28,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:28,842 INFO L225 Difference]: With dead ends: 630 [2020-10-13 23:33:28,842 INFO L226 Difference]: Without dead ends: 331 [2020-10-13 23:33:28,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:33:28,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-13 23:33:28,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 330. [2020-10-13 23:33:28,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-13 23:33:28,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 339 transitions. [2020-10-13 23:33:28,853 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 339 transitions. Word has length 323 [2020-10-13 23:33:28,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:28,854 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 339 transitions. [2020-10-13 23:33:28,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:33:28,854 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 339 transitions. [2020-10-13 23:33:28,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-13 23:33:28,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:28,856 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:28,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:33:28,856 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:28,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:28,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1621547882, now seen corresponding path program 28 times [2020-10-13 23:33:28,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:28,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953524095] [2020-10-13 23:33:28,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:28,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:28,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:29,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:29,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:29,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:34,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:34,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-13 23:33:34,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:34,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5474 [2020-10-13 23:33:34,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:34,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:34,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:33:34,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-13 23:33:34,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:33:34,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:34,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:34,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:34,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:34,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:34,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:34,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:34,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:34,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:34,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:34,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:34,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:34,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2456 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2167 trivial. 0 not checked. [2020-10-13 23:33:34,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953524095] [2020-10-13 23:33:34,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:34,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:33:34,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040632646] [2020-10-13 23:33:34,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:33:34,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:34,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:33:34,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:33:34,662 INFO L87 Difference]: Start difference. First operand 330 states and 339 transitions. Second operand 21 states. [2020-10-13 23:33:35,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:35,407 INFO L93 Difference]: Finished difference Result 617 states and 641 transitions. [2020-10-13 23:33:35,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:33:35,408 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 325 [2020-10-13 23:33:35,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:35,410 INFO L225 Difference]: With dead ends: 617 [2020-10-13 23:33:35,410 INFO L226 Difference]: Without dead ends: 354 [2020-10-13 23:33:35,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:33:35,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-13 23:33:35,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 346. [2020-10-13 23:33:35,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2020-10-13 23:33:35,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 355 transitions. [2020-10-13 23:33:35,421 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 355 transitions. Word has length 325 [2020-10-13 23:33:35,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:35,422 INFO L479 AbstractCegarLoop]: Abstraction has 346 states and 355 transitions. [2020-10-13 23:33:35,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:33:35,422 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 355 transitions. [2020-10-13 23:33:35,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-13 23:33:35,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:35,424 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:35,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:33:35,425 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:35,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:35,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1013512538, now seen corresponding path program 29 times [2020-10-13 23:33:35,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:35,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719135255] [2020-10-13 23:33:35,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:35,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:35,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:35,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:35,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:35,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:40,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:40,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 349 [2020-10-13 23:33:40,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:40,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5099 [2020-10-13 23:33:40,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:40,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:40,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:33:40,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:40,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:33:40,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:40,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:40,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:40,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:40,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:40,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:40,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:40,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:40,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:40,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:40,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:40,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:40,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2736 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2020-10-13 23:33:40,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719135255] [2020-10-13 23:33:40,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:40,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:33:40,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865617436] [2020-10-13 23:33:40,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:33:40,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:40,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:33:40,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:33:40,774 INFO L87 Difference]: Start difference. First operand 346 states and 355 transitions. Second operand 16 states. [2020-10-13 23:33:40,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:40,951 INFO L93 Difference]: Finished difference Result 664 states and 682 transitions. [2020-10-13 23:33:40,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:33:40,952 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 341 [2020-10-13 23:33:40,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:40,953 INFO L225 Difference]: With dead ends: 664 [2020-10-13 23:33:40,953 INFO L226 Difference]: Without dead ends: 349 [2020-10-13 23:33:40,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:33:40,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-13 23:33:40,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 348. [2020-10-13 23:33:40,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-10-13 23:33:40,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 357 transitions. [2020-10-13 23:33:40,963 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 357 transitions. Word has length 341 [2020-10-13 23:33:40,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:40,963 INFO L479 AbstractCegarLoop]: Abstraction has 348 states and 357 transitions. [2020-10-13 23:33:40,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:33:40,964 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 357 transitions. [2020-10-13 23:33:40,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-10-13 23:33:40,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:40,966 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:40,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:33:40,966 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:40,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:40,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1428529032, now seen corresponding path program 30 times [2020-10-13 23:33:40,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:40,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453593969] [2020-10-13 23:33:40,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:41,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:41,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:41,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:41,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:41,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:46,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:46,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 351 [2020-10-13 23:33:46,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:46,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5280 [2020-10-13 23:33:46,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:46,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:46,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:33:46,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 23:33:46,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:33:46,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:46,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:46,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:46,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:46,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:46,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:46,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:46,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:46,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:46,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:46,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:46,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:46,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2761 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2437 trivial. 0 not checked. [2020-10-13 23:33:46,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453593969] [2020-10-13 23:33:46,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:46,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:33:46,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556305420] [2020-10-13 23:33:46,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:33:46,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:46,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:33:46,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:33:46,589 INFO L87 Difference]: Start difference. First operand 348 states and 357 transitions. Second operand 22 states. [2020-10-13 23:33:47,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:47,399 INFO L93 Difference]: Finished difference Result 649 states and 673 transitions. [2020-10-13 23:33:47,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:33:47,400 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 343 [2020-10-13 23:33:47,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:47,402 INFO L225 Difference]: With dead ends: 649 [2020-10-13 23:33:47,402 INFO L226 Difference]: Without dead ends: 372 [2020-10-13 23:33:47,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:33:47,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-10-13 23:33:47,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 364. [2020-10-13 23:33:47,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-10-13 23:33:47,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 373 transitions. [2020-10-13 23:33:47,413 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 373 transitions. Word has length 343 [2020-10-13 23:33:47,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:47,414 INFO L479 AbstractCegarLoop]: Abstraction has 364 states and 373 transitions. [2020-10-13 23:33:47,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:33:47,414 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 373 transitions. [2020-10-13 23:33:47,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-10-13 23:33:47,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:47,416 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:47,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:33:47,417 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:47,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:47,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1673829784, now seen corresponding path program 31 times [2020-10-13 23:33:47,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:47,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436962133] [2020-10-13 23:33:47,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:47,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:47,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:47,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:47,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:47,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:53,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:53,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 367 [2020-10-13 23:33:53,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:53,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6272 [2020-10-13 23:33:53,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:53,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:53,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:33:53,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-13 23:33:53,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:33:53,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:54,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:54,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:54,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:54,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:54,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:54,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:54,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:54,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:54,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:54,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:54,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:54,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3057 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2696 trivial. 0 not checked. [2020-10-13 23:33:54,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436962133] [2020-10-13 23:33:54,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:54,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:33:54,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520000908] [2020-10-13 23:33:54,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:33:54,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:54,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:33:54,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:33:54,095 INFO L87 Difference]: Start difference. First operand 364 states and 373 transitions. Second operand 23 states. [2020-10-13 23:33:54,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:54,971 INFO L93 Difference]: Finished difference Result 679 states and 703 transitions. [2020-10-13 23:33:54,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:33:54,971 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 359 [2020-10-13 23:33:54,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:54,974 INFO L225 Difference]: With dead ends: 679 [2020-10-13 23:33:54,974 INFO L226 Difference]: Without dead ends: 388 [2020-10-13 23:33:54,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:33:54,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-10-13 23:33:54,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 380. [2020-10-13 23:33:54,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2020-10-13 23:33:54,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 389 transitions. [2020-10-13 23:33:54,984 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 389 transitions. Word has length 359 [2020-10-13 23:33:54,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:54,985 INFO L479 AbstractCegarLoop]: Abstraction has 380 states and 389 transitions. [2020-10-13 23:33:54,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:33:54,985 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 389 transitions. [2020-10-13 23:33:54,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-10-13 23:33:54,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:54,987 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:54,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:33:54,988 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:54,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:54,988 INFO L82 PathProgramCache]: Analyzing trace with hash -906410920, now seen corresponding path program 32 times [2020-10-13 23:33:54,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:54,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117989568] [2020-10-13 23:33:54,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:55,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:55,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:55,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:55,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:55,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:00,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:00,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 383 [2020-10-13 23:34:00,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:34:00,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5430 [2020-10-13 23:34:00,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:00,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:00,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:34:00,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:00,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:34:00,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:00,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:00,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:00,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:00,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:00,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:00,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:00,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:00,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:00,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:00,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:00,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:00,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:00,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3369 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 3200 trivial. 0 not checked. [2020-10-13 23:34:00,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117989568] [2020-10-13 23:34:00,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:00,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:34:00,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134065020] [2020-10-13 23:34:00,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:34:00,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:00,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:34:00,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:34:00,680 INFO L87 Difference]: Start difference. First operand 380 states and 389 transitions. Second operand 17 states. [2020-10-13 23:34:00,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:00,853 INFO L93 Difference]: Finished difference Result 730 states and 748 transitions. [2020-10-13 23:34:00,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:34:00,853 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 375 [2020-10-13 23:34:00,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:00,856 INFO L225 Difference]: With dead ends: 730 [2020-10-13 23:34:00,856 INFO L226 Difference]: Without dead ends: 383 [2020-10-13 23:34:00,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:34:00,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-10-13 23:34:00,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 382. [2020-10-13 23:34:00,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2020-10-13 23:34:00,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 391 transitions. [2020-10-13 23:34:00,865 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 391 transitions. Word has length 375 [2020-10-13 23:34:00,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:00,865 INFO L479 AbstractCegarLoop]: Abstraction has 382 states and 391 transitions. [2020-10-13 23:34:00,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:34:00,866 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 391 transitions. [2020-10-13 23:34:00,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-13 23:34:00,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:00,868 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:00,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:34:00,868 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:00,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:00,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1632148490, now seen corresponding path program 33 times [2020-10-13 23:34:00,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:00,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601167599] [2020-10-13 23:34:00,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:00,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:00,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:01,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:01,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:01,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:06,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:06,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 385 [2020-10-13 23:34:06,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:34:06,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5587 [2020-10-13 23:34:06,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:06,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:06,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:34:06,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 125 [2020-10-13 23:34:06,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:34:06,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:06,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:06,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:06,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:06,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:06,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:06,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:06,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:06,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:06,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:06,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:06,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:06,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3396 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2996 trivial. 0 not checked. [2020-10-13 23:34:06,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601167599] [2020-10-13 23:34:06,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:06,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:34:06,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542246024] [2020-10-13 23:34:06,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:34:06,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:06,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:34:06,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:34:06,878 INFO L87 Difference]: Start difference. First operand 382 states and 391 transitions. Second operand 24 states. [2020-10-13 23:34:07,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:07,797 INFO L93 Difference]: Finished difference Result 711 states and 735 transitions. [2020-10-13 23:34:07,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:34:07,798 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 377 [2020-10-13 23:34:07,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:07,800 INFO L225 Difference]: With dead ends: 711 [2020-10-13 23:34:07,800 INFO L226 Difference]: Without dead ends: 406 [2020-10-13 23:34:07,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:34:07,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-10-13 23:34:07,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 398. [2020-10-13 23:34:07,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398 states. [2020-10-13 23:34:07,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 407 transitions. [2020-10-13 23:34:07,810 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 407 transitions. Word has length 377 [2020-10-13 23:34:07,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:07,810 INFO L479 AbstractCegarLoop]: Abstraction has 398 states and 407 transitions. [2020-10-13 23:34:07,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:34:07,810 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 407 transitions. [2020-10-13 23:34:07,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-10-13 23:34:07,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:07,813 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:07,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:34:07,814 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:07,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:07,814 INFO L82 PathProgramCache]: Analyzing trace with hash 957032934, now seen corresponding path program 34 times [2020-10-13 23:34:07,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:07,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999761159] [2020-10-13 23:34:07,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:07,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:07,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:08,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:08,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:08,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:14,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:14,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 401 [2020-10-13 23:34:14,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:34:14,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6665 [2020-10-13 23:34:14,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:14,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:14,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:34:14,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:14,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:34:14,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:14,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:14,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:14,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:14,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:14,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:14,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:14,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:14,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:14,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:14,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:14,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:14,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3724 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2020-10-13 23:34:14,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999761159] [2020-10-13 23:34:14,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:14,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:34:14,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060247867] [2020-10-13 23:34:14,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:34:14,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:14,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:34:14,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:34:14,855 INFO L87 Difference]: Start difference. First operand 398 states and 407 transitions. Second operand 18 states. [2020-10-13 23:34:14,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:14,991 INFO L93 Difference]: Finished difference Result 764 states and 782 transitions. [2020-10-13 23:34:14,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:34:14,992 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 393 [2020-10-13 23:34:14,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:14,994 INFO L225 Difference]: With dead ends: 764 [2020-10-13 23:34:14,994 INFO L226 Difference]: Without dead ends: 401 [2020-10-13 23:34:14,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:34:14,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-10-13 23:34:15,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 400. [2020-10-13 23:34:15,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-10-13 23:34:15,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 409 transitions. [2020-10-13 23:34:15,004 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 409 transitions. Word has length 393 [2020-10-13 23:34:15,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:15,005 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 409 transitions. [2020-10-13 23:34:15,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:34:15,005 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 409 transitions. [2020-10-13 23:34:15,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-10-13 23:34:15,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:15,008 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:15,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:34:15,008 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:15,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:15,008 INFO L82 PathProgramCache]: Analyzing trace with hash 726130180, now seen corresponding path program 35 times [2020-10-13 23:34:15,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:15,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739058289] [2020-10-13 23:34:15,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:15,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:15,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:15,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:15,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:15,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:20,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:20,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 403 [2020-10-13 23:34:20,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:34:20,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5171 [2020-10-13 23:34:20,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:20,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:20,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:34:20,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-13 23:34:20,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:34:20,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:20,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:20,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:20,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:20,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:20,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:20,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:20,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:20,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:20,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:20,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:20,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:20,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3753 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 3312 trivial. 0 not checked. [2020-10-13 23:34:20,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739058289] [2020-10-13 23:34:20,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:20,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:34:20,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308307075] [2020-10-13 23:34:20,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:34:20,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:20,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:34:20,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:34:20,663 INFO L87 Difference]: Start difference. First operand 400 states and 409 transitions. Second operand 25 states. [2020-10-13 23:34:21,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:21,561 INFO L93 Difference]: Finished difference Result 743 states and 767 transitions. [2020-10-13 23:34:21,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:34:21,562 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 395 [2020-10-13 23:34:21,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:21,565 INFO L225 Difference]: With dead ends: 743 [2020-10-13 23:34:21,565 INFO L226 Difference]: Without dead ends: 424 [2020-10-13 23:34:21,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:34:21,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-10-13 23:34:21,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 416. [2020-10-13 23:34:21,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-10-13 23:34:21,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 425 transitions. [2020-10-13 23:34:21,575 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 425 transitions. Word has length 395 [2020-10-13 23:34:21,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:21,575 INFO L479 AbstractCegarLoop]: Abstraction has 416 states and 425 transitions. [2020-10-13 23:34:21,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:34:21,576 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 425 transitions. [2020-10-13 23:34:21,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-10-13 23:34:21,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:21,578 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:21,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:34:21,579 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:21,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:21,579 INFO L82 PathProgramCache]: Analyzing trace with hash 712017908, now seen corresponding path program 36 times [2020-10-13 23:34:21,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:21,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013433399] [2020-10-13 23:34:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:21,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:21,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:21,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:21,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:22,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:26,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:26,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 419 [2020-10-13 23:34:26,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:34:26,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5381 [2020-10-13 23:34:26,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:26,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:26,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:34:26,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:26,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:34:26,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:27,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:27,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:27,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:27,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:27,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:27,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:34:27,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:27,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:27,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:27,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:27,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:27,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4097 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2020-10-13 23:34:27,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013433399] [2020-10-13 23:34:27,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:27,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:34:27,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915416785] [2020-10-13 23:34:27,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:34:27,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:27,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:34:27,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:34:27,342 INFO L87 Difference]: Start difference. First operand 416 states and 425 transitions. Second operand 19 states. [2020-10-13 23:34:27,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:27,485 INFO L93 Difference]: Finished difference Result 798 states and 816 transitions. [2020-10-13 23:34:27,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:34:27,486 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 411 [2020-10-13 23:34:27,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:27,488 INFO L225 Difference]: With dead ends: 798 [2020-10-13 23:34:27,488 INFO L226 Difference]: Without dead ends: 419 [2020-10-13 23:34:27,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:34:27,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2020-10-13 23:34:27,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 418. [2020-10-13 23:34:27,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2020-10-13 23:34:27,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 427 transitions. [2020-10-13 23:34:27,498 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 427 transitions. Word has length 411 [2020-10-13 23:34:27,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:27,499 INFO L479 AbstractCegarLoop]: Abstraction has 418 states and 427 transitions. [2020-10-13 23:34:27,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:34:27,499 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 427 transitions. [2020-10-13 23:34:27,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-10-13 23:34:27,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:27,502 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:27,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:34:27,502 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:27,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:27,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1818210450, now seen corresponding path program 37 times [2020-10-13 23:34:27,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:27,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [487154628] [2020-10-13 23:34:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:27,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:27,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:27,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:27,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:27,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:33,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:33,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 421 [2020-10-13 23:34:33,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:34:33,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5861 [2020-10-13 23:34:33,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:33,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:33,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:34:33,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 137 [2020-10-13 23:34:33,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:34:33,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:33,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:33,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:33,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:33,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:33,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:33,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:33,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:33,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:33,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:33,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:33,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:33,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:33,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4128 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3644 trivial. 0 not checked. [2020-10-13 23:34:33,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [487154628] [2020-10-13 23:34:33,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:33,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:34:33,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192591419] [2020-10-13 23:34:33,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:34:33,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:33,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:34:33,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:34:33,855 INFO L87 Difference]: Start difference. First operand 418 states and 427 transitions. Second operand 26 states. [2020-10-13 23:34:34,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:34,900 INFO L93 Difference]: Finished difference Result 775 states and 799 transitions. [2020-10-13 23:34:34,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:34:34,901 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 413 [2020-10-13 23:34:34,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:34,903 INFO L225 Difference]: With dead ends: 775 [2020-10-13 23:34:34,903 INFO L226 Difference]: Without dead ends: 442 [2020-10-13 23:34:34,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:34:34,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-10-13 23:34:34,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 434. [2020-10-13 23:34:34,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2020-10-13 23:34:34,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 443 transitions. [2020-10-13 23:34:34,914 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 443 transitions. Word has length 413 [2020-10-13 23:34:34,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:34,914 INFO L479 AbstractCegarLoop]: Abstraction has 434 states and 443 transitions. [2020-10-13 23:34:34,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:34:34,915 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 443 transitions. [2020-10-13 23:34:34,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-10-13 23:34:34,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:34,918 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:34,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:34:34,918 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:34,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:34,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1255947906, now seen corresponding path program 38 times [2020-10-13 23:34:34,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:34,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963194523] [2020-10-13 23:34:34,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:34,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:35,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:35,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:35,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking...