/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-lopstr16/partial_lesser_bound.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 00:01:12,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 00:01:12,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 00:01:12,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 00:01:12,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 00:01:12,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 00:01:12,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 00:01:12,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 00:01:12,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 00:01:12,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 00:01:12,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 00:01:12,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 00:01:12,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 00:01:12,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 00:01:12,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 00:01:12,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 00:01:12,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 00:01:12,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 00:01:12,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 00:01:12,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 00:01:12,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 00:01:12,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 00:01:12,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 00:01:12,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 00:01:12,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 00:01:12,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 00:01:12,994 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 00:01:12,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 00:01:12,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 00:01:13,000 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 00:01:13,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 00:01:13,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 00:01:13,003 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 00:01:13,004 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 00:01:13,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 00:01:13,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 00:01:13,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 00:01:13,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 00:01:13,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 00:01:13,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 00:01:13,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 00:01:13,009 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 00:01:13,051 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 00:01:13,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 00:01:13,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 00:01:13,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 00:01:13,054 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 00:01:13,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 00:01:13,054 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 00:01:13,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 00:01:13,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 00:01:13,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 00:01:13,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 00:01:13,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 00:01:13,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 00:01:13,057 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 00:01:13,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 00:01:13,057 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 00:01:13,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 00:01:13,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 00:01:13,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 00:01:13,058 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 00:01:13,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 00:01:13,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 00:01:13,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 00:01:13,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 00:01:13,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 00:01:13,059 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 00:01:13,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 00:01:13,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 00:01:13,059 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 00:01:13,060 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; [2020-10-14 00:01:13,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 00:01:13,365 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 00:01:13,372 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 00:01:13,373 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 00:01:13,374 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 00:01:13,374 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/partial_lesser_bound.i [2020-10-14 00:01:13,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/45e338b88/cbebcba87779494f9bd314c0508aa499/FLAG251978d34 [2020-10-14 00:01:13,947 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 00:01:13,948 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/partial_lesser_bound.i [2020-10-14 00:01:13,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/45e338b88/cbebcba87779494f9bd314c0508aa499/FLAG251978d34 [2020-10-14 00:01:14,323 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/45e338b88/cbebcba87779494f9bd314c0508aa499 [2020-10-14 00:01:14,334 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 00:01:14,336 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 00:01:14,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 00:01:14,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 00:01:14,341 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 00:01:14,342 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 12:01:14" (1/1) ... [2020-10-14 00:01:14,345 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a018b04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:14, skipping insertion in model container [2020-10-14 00:01:14,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 12:01:14" (1/1) ... [2020-10-14 00:01:14,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 00:01:14,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 00:01:14,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 00:01:14,555 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 00:01:14,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 00:01:14,595 INFO L208 MainTranslator]: Completed translation [2020-10-14 00:01:14,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:14 WrapperNode [2020-10-14 00:01:14,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 00:01:14,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 00:01:14,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 00:01:14,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 00:01:14,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:14" (1/1) ... [2020-10-14 00:01:14,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:14" (1/1) ... [2020-10-14 00:01:14,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:14" (1/1) ... [2020-10-14 00:01:14,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:14" (1/1) ... [2020-10-14 00:01:14,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:14" (1/1) ... [2020-10-14 00:01:14,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:14" (1/1) ... [2020-10-14 00:01:14,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:14" (1/1) ... [2020-10-14 00:01:14,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 00:01:14,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 00:01:14,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 00:01:14,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 00:01:14,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 00:01:14,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 00:01:14,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 00:01:14,811 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 00:01:14,811 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 00:01:14,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 00:01:14,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 00:01:14,811 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 00:01:14,811 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 00:01:14,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 00:01:14,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-14 00:01:14,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-14 00:01:14,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 00:01:14,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 00:01:14,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 00:01:14,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 00:01:15,063 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 00:01:15,064 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-14 00:01:15,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 12:01:15 BoogieIcfgContainer [2020-10-14 00:01:15,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 00:01:15,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 00:01:15,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 00:01:15,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 00:01:15,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 12:01:14" (1/3) ... [2020-10-14 00:01:15,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd86732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 12:01:15, skipping insertion in model container [2020-10-14 00:01:15,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:14" (2/3) ... [2020-10-14 00:01:15,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd86732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 12:01:15, skipping insertion in model container [2020-10-14 00:01:15,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 12:01:15" (3/3) ... [2020-10-14 00:01:15,079 INFO L109 eAbstractionObserver]: Analyzing ICFG partial_lesser_bound.i [2020-10-14 00:01:15,092 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 00:01:15,101 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 00:01:15,118 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 00:01:15,147 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 00:01:15,147 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 00:01:15,147 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 00:01:15,148 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 00:01:15,148 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 00:01:15,148 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 00:01:15,148 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 00:01:15,148 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 00:01:15,170 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-14 00:01:15,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 00:01:15,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:15,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:15,179 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:15,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:15,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1778002988, now seen corresponding path program 1 times [2020-10-14 00:01:15,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:15,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913279517] [2020-10-14 00:01:15,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:15,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:15,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:15,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:15,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 00:01:15,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:01:15,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-14 00:01:15,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:15,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:15,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:15,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 00:01:15,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:15,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 00:01:15,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:15,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:15,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:15,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:15,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:15,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 00:01:15,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:15,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:15,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:15,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:15,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:15,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-14 00:01:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:01:15,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913279517] [2020-10-14 00:01:15,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 00:01:15,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 00:01:15,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782290021] [2020-10-14 00:01:15,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 00:01:15,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:15,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 00:01:15,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 00:01:15,710 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-14 00:01:15,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:15,811 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2020-10-14 00:01:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 00:01:15,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-14 00:01:15,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:15,822 INFO L225 Difference]: With dead ends: 46 [2020-10-14 00:01:15,823 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 00:01:15,827 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 [2020-10-14 00:01:15,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 00:01:15,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-14 00:01:15,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 00:01:15,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-14 00:01:15,872 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-10-14 00:01:15,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:15,873 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-14 00:01:15,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 00:01:15,873 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-14 00:01:15,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 00:01:15,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:15,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:15,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 00:01:15,875 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:15,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:15,875 INFO L82 PathProgramCache]: Analyzing trace with hash -262172122, now seen corresponding path program 1 times [2020-10-14 00:01:15,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:15,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923452292] [2020-10-14 00:01:15,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:15,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:15,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:16,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:16,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 00:01:16,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:01:16,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-14 00:01:16,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:16,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 00:01:16,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:01:16,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 00:01:16,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 00:01:16,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:16,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:16,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:16,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:16,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:16,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 00:01:16,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:16,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:16,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:16,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:16,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:16,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:01:16,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923452292] [2020-10-14 00:01:16,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 00:01:16,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 00:01:16,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560464563] [2020-10-14 00:01:16,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 00:01:16,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:16,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 00:01:16,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 00:01:16,203 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2020-10-14 00:01:16,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:16,333 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-10-14 00:01:16,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 00:01:16,334 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-14 00:01:16,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:16,335 INFO L225 Difference]: With dead ends: 50 [2020-10-14 00:01:16,335 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 00:01:16,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 00:01:16,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 00:01:16,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2020-10-14 00:01:16,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 00:01:16,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-14 00:01:16,345 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2020-10-14 00:01:16,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:16,346 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-14 00:01:16,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 00:01:16,346 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-14 00:01:16,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 00:01:16,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:16,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:16,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 00:01:16,348 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:16,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:16,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1323409058, now seen corresponding path program 1 times [2020-10-14 00:01:16,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:16,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385809261] [2020-10-14 00:01:16,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:16,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:16,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:16,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:17,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:17,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 00:01:17,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:01:17,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 770 [2020-10-14 00:01:17,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:17,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:17,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 00:01:17,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 00:01:17,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 00:01:17,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:17,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:17,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:17,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:17,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:17,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:17,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 00:01:17,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:17,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:17,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:17,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:17,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:17,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 00:01:17,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385809261] [2020-10-14 00:01:17,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:17,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 00:01:17,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350491805] [2020-10-14 00:01:17,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 00:01:17,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:17,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 00:01:17,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 00:01:17,212 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-10-14 00:01:17,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:17,403 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-10-14 00:01:17,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 00:01:17,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-14 00:01:17,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:17,405 INFO L225 Difference]: With dead ends: 65 [2020-10-14 00:01:17,405 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 00:01:17,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-14 00:01:17,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 00:01:17,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 28. [2020-10-14 00:01:17,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 00:01:17,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-14 00:01:17,414 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2020-10-14 00:01:17,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:17,415 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-14 00:01:17,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 00:01:17,415 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-14 00:01:17,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 00:01:17,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:17,416 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:17,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 00:01:17,417 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:17,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:17,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1582955806, now seen corresponding path program 2 times [2020-10-14 00:01:17,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:17,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919027930] [2020-10-14 00:01:17,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:17,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:17,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:17,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:18,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:18,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 00:01:18,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:01:18,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1518 [2020-10-14 00:01:18,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:18,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:18,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 00:01:18,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 00:01:18,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 00:01:18,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:19,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:19,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:19,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:19,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:19,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:19,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:01:19,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:19,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:19,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:19,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:19,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:19,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-14 00:01:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 00:01:19,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919027930] [2020-10-14 00:01:19,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:19,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 00:01:19,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069611178] [2020-10-14 00:01:19,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 00:01:19,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:19,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 00:01:19,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 00:01:19,051 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2020-10-14 00:01:19,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:19,277 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-10-14 00:01:19,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 00:01:19,278 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-14 00:01:19,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:19,280 INFO L225 Difference]: With dead ends: 81 [2020-10-14 00:01:19,280 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 00:01:19,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 00:01:19,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 00:01:19,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2020-10-14 00:01:19,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 00:01:19,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-14 00:01:19,288 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2020-10-14 00:01:19,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:19,289 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-14 00:01:19,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 00:01:19,289 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-14 00:01:19,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 00:01:19,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:19,290 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:19,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 00:01:19,291 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:19,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:19,291 INFO L82 PathProgramCache]: Analyzing trace with hash -657216102, now seen corresponding path program 3 times [2020-10-14 00:01:19,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:19,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811992948] [2020-10-14 00:01:19,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:19,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:19,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:19,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:22,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:22,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 00:01:22,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:01:22,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2771 [2020-10-14 00:01:22,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:22,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:22,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 00:01:22,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 00:01:22,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 00:01:22,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:22,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:22,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:22,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:22,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:22,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:22,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 00:01:22,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:22,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:22,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:22,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:22,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:22,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 00:01:22,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811992948] [2020-10-14 00:01:22,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:22,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 00:01:22,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754367788] [2020-10-14 00:01:22,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 00:01:22,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:22,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 00:01:22,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 00:01:22,162 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 7 states. [2020-10-14 00:01:22,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:22,484 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2020-10-14 00:01:22,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 00:01:22,485 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-14 00:01:22,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:22,486 INFO L225 Difference]: With dead ends: 97 [2020-10-14 00:01:22,486 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 00:01:22,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-14 00:01:22,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 00:01:22,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 36. [2020-10-14 00:01:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 00:01:22,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-14 00:01:22,494 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2020-10-14 00:01:22,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:22,495 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-14 00:01:22,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 00:01:22,495 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-14 00:01:22,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 00:01:22,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:22,496 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:22,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 00:01:22,497 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:22,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:22,497 INFO L82 PathProgramCache]: Analyzing trace with hash 702132246, now seen corresponding path program 4 times [2020-10-14 00:01:22,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:22,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459828357] [2020-10-14 00:01:22,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:22,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:22,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:23,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:27,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:27,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 00:01:27,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:01:27,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4820 [2020-10-14 00:01:27,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:27,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:27,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 00:01:27,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:01:27,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 00:01:27,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:27,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:27,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:27,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:27,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:27,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:27,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 00:01:27,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:27,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:27,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:27,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:27,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:27,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 00:01:27,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459828357] [2020-10-14 00:01:27,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:27,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 00:01:27,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447631331] [2020-10-14 00:01:27,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 00:01:27,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:27,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 00:01:27,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 00:01:27,487 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 8 states. [2020-10-14 00:01:27,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:27,930 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2020-10-14 00:01:27,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 00:01:27,931 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-14 00:01:27,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:27,933 INFO L225 Difference]: With dead ends: 113 [2020-10-14 00:01:27,933 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 00:01:27,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-14 00:01:27,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 00:01:27,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 40. [2020-10-14 00:01:27,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 00:01:27,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-14 00:01:27,950 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 31 [2020-10-14 00:01:27,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:27,951 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-14 00:01:27,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 00:01:27,951 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-14 00:01:27,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 00:01:27,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:27,953 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:27,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 00:01:27,953 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:27,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:27,954 INFO L82 PathProgramCache]: Analyzing trace with hash -294189934, now seen corresponding path program 5 times [2020-10-14 00:01:27,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:27,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433104406] [2020-10-14 00:01:27,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:27,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:28,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:28,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:32,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:32,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 00:01:32,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:01:32,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 00:01:32,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:32,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:32,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 00:01:32,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:01:32,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 00:01:32,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:33,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:33,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:33,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:33,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:33,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:33,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:01:33,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:33,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:33,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:33,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:33,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:33,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 00:01:33,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433104406] [2020-10-14 00:01:33,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:33,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 00:01:33,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672350350] [2020-10-14 00:01:33,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 00:01:33,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:33,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 00:01:33,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 00:01:33,076 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-10-14 00:01:33,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:33,476 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2020-10-14 00:01:33,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 00:01:33,476 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-14 00:01:33,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:33,478 INFO L225 Difference]: With dead ends: 129 [2020-10-14 00:01:33,478 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 00:01:33,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-14 00:01:33,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 00:01:33,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 44. [2020-10-14 00:01:33,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 00:01:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-14 00:01:33,494 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 35 [2020-10-14 00:01:33,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:33,495 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-14 00:01:33,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 00:01:33,496 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-14 00:01:33,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 00:01:33,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:33,497 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:33,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 00:01:33,497 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:33,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:33,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1966517006, now seen corresponding path program 6 times [2020-10-14 00:01:33,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:33,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100806197] [2020-10-14 00:01:33,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:33,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:33,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:34,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:38,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:38,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 00:01:38,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:01:38,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 00:01:38,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:38,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:38,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 00:01:38,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:01:38,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 00:01:38,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:38,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:38,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:38,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:38,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:38,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:38,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 00:01:38,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:38,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:38,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:38,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:38,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:38,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 00:01:38,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100806197] [2020-10-14 00:01:38,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:38,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 00:01:38,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568369826] [2020-10-14 00:01:38,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 00:01:38,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:38,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 00:01:38,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 00:01:38,618 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 10 states. [2020-10-14 00:01:39,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:39,085 INFO L93 Difference]: Finished difference Result 145 states and 150 transitions. [2020-10-14 00:01:39,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 00:01:39,086 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-14 00:01:39,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:39,087 INFO L225 Difference]: With dead ends: 145 [2020-10-14 00:01:39,087 INFO L226 Difference]: Without dead ends: 120 [2020-10-14 00:01:39,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-14 00:01:39,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-14 00:01:39,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 48. [2020-10-14 00:01:39,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 00:01:39,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-14 00:01:39,101 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 39 [2020-10-14 00:01:39,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:39,102 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-14 00:01:39,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 00:01:39,102 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-14 00:01:39,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 00:01:39,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:39,107 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:39,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 00:01:39,108 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:39,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:39,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1042523018, now seen corresponding path program 7 times [2020-10-14 00:01:39,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:39,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374808580] [2020-10-14 00:01:39,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:39,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:39,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:40,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:44,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:44,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 00:01:44,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:01:44,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 00:01:44,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:44,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:44,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 00:01:44,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:01:44,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 00:01:44,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:44,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:44,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:44,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:44,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:44,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:44,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:44,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:01:44,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:44,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:44,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:44,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:44,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:44,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-14 00:01:44,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374808580] [2020-10-14 00:01:44,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:44,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 00:01:44,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100742765] [2020-10-14 00:01:44,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 00:01:44,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:44,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 00:01:44,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 00:01:44,239 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 11 states. [2020-10-14 00:01:44,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:44,738 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2020-10-14 00:01:44,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 00:01:44,739 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-14 00:01:44,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:44,741 INFO L225 Difference]: With dead ends: 161 [2020-10-14 00:01:44,742 INFO L226 Difference]: Without dead ends: 134 [2020-10-14 00:01:44,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-14 00:01:44,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-14 00:01:44,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 52. [2020-10-14 00:01:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 00:01:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-14 00:01:44,750 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2020-10-14 00:01:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:44,750 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-14 00:01:44,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 00:01:44,751 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-14 00:01:44,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 00:01:44,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:44,752 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:44,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 00:01:44,752 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:44,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:44,753 INFO L82 PathProgramCache]: Analyzing trace with hash 2059988486, now seen corresponding path program 8 times [2020-10-14 00:01:44,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:44,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591278407] [2020-10-14 00:01:44,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:44,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:44,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:46,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:49,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:49,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 00:01:49,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:01:49,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 00:01:49,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:49,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:49,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 00:01:49,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 00:01:49,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 00:01:49,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:49,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:49,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:49,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:49,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:49,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:49,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:01:49,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:49,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:49,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:49,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:49,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:49,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-14 00:01:49,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591278407] [2020-10-14 00:01:49,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:49,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 00:01:49,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096815126] [2020-10-14 00:01:49,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 00:01:49,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:49,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 00:01:49,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 00:01:49,998 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 9 states. [2020-10-14 00:01:50,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:50,397 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-14 00:01:50,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 00:01:50,398 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-14 00:01:50,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:50,399 INFO L225 Difference]: With dead ends: 62 [2020-10-14 00:01:50,399 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 00:01:50,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-14 00:01:50,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 00:01:50,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-14 00:01:50,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 00:01:50,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-14 00:01:50,409 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 47 [2020-10-14 00:01:50,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:50,409 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-14 00:01:50,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 00:01:50,409 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-14 00:01:50,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 00:01:50,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:50,410 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:50,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 00:01:50,411 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:50,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:50,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1478506813, now seen corresponding path program 1 times [2020-10-14 00:01:50,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:50,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316605979] [2020-10-14 00:01:50,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:50,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:50,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:50,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:51,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:55,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:55,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 00:01:55,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:01:55,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 00:01:55,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:55,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:55,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 00:01:55,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 00:01:55,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 00:01:55,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:55,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:55,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:55,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:55,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:55,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:55,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:01:55,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:55,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:55,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:55,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:55,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:55,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:55,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-14 00:01:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:55,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:55,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:55,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:01:55,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:55,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:01:55,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:55,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:55,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:55,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:01:55,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:55,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:55,563 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-14 00:01:55,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316605979] [2020-10-14 00:01:55,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:55,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 00:01:55,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630570970] [2020-10-14 00:01:55,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 00:01:55,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:55,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 00:01:55,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 00:01:55,565 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 12 states. [2020-10-14 00:01:56,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:56,159 INFO L93 Difference]: Finished difference Result 181 states and 186 transitions. [2020-10-14 00:01:56,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 00:01:56,162 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-14 00:01:56,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:56,164 INFO L225 Difference]: With dead ends: 181 [2020-10-14 00:01:56,164 INFO L226 Difference]: Without dead ends: 146 [2020-10-14 00:01:56,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-14 00:01:56,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-14 00:01:56,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 62. [2020-10-14 00:01:56,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 00:01:56,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-14 00:01:56,177 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 55 [2020-10-14 00:01:56,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:56,177 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-14 00:01:56,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 00:01:56,178 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-14 00:01:56,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 00:01:56,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:56,179 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:56,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 00:01:56,179 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:56,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:56,180 INFO L82 PathProgramCache]: Analyzing trace with hash 139631033, now seen corresponding path program 2 times [2020-10-14 00:01:56,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:56,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156973594] [2020-10-14 00:01:56,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:56,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:56,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:56,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:58,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:01,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:01,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 00:02:01,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:02:01,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 00:02:01,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:01,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:01,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 00:02:01,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 00:02:01,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 00:02:01,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:01,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:01,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:01,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:01,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:01,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:01,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:01,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:01,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:01,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:01,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:01,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:01,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:01,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-14 00:02:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:01,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:01,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:01,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:01,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:01,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:02:01,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:01,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:01,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:01,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:01,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:01,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-14 00:02:01,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156973594] [2020-10-14 00:02:01,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:01,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 00:02:01,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306055329] [2020-10-14 00:02:01,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 00:02:01,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:01,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 00:02:01,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 00:02:01,324 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 13 states. [2020-10-14 00:02:01,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:01,989 INFO L93 Difference]: Finished difference Result 197 states and 202 transitions. [2020-10-14 00:02:01,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 00:02:01,989 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-10-14 00:02:01,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:01,991 INFO L225 Difference]: With dead ends: 197 [2020-10-14 00:02:01,991 INFO L226 Difference]: Without dead ends: 160 [2020-10-14 00:02:01,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-14 00:02:01,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-14 00:02:02,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 66. [2020-10-14 00:02:02,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 00:02:02,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-14 00:02:02,003 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 59 [2020-10-14 00:02:02,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:02,003 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-14 00:02:02,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 00:02:02,003 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-14 00:02:02,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 00:02:02,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:02,004 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:02,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 00:02:02,005 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:02,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:02,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1633766453, now seen corresponding path program 3 times [2020-10-14 00:02:02,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:02,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160328777] [2020-10-14 00:02:02,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:02,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:02,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:02,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:03,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:07,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:07,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 00:02:07,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:02:07,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 00:02:07,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:07,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:07,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 00:02:07,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 00:02:07,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 00:02:07,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:07,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:07,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:07,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:07,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:07,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:07,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:07,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:07,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:07,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:07,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:07,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:07,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:07,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-14 00:02:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:07,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:07,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:07,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:07,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:07,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:02:07,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:07,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:07,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:07,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:07,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:07,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-14 00:02:07,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160328777] [2020-10-14 00:02:07,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:07,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 00:02:07,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883631328] [2020-10-14 00:02:07,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 00:02:07,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:07,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 00:02:07,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 00:02:07,194 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 14 states. [2020-10-14 00:02:07,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:07,896 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2020-10-14 00:02:07,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 00:02:07,896 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-14 00:02:07,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:07,898 INFO L225 Difference]: With dead ends: 213 [2020-10-14 00:02:07,898 INFO L226 Difference]: Without dead ends: 174 [2020-10-14 00:02:07,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-14 00:02:07,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-14 00:02:07,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 70. [2020-10-14 00:02:07,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 00:02:07,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-14 00:02:07,910 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2020-10-14 00:02:07,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:07,911 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-14 00:02:07,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 00:02:07,911 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-14 00:02:07,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 00:02:07,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:07,912 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:07,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 00:02:07,913 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:07,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:07,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1851216049, now seen corresponding path program 4 times [2020-10-14 00:02:07,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:07,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217451839] [2020-10-14 00:02:07,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:07,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:07,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:08,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:10,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:12,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:12,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 00:02:12,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:02:12,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 00:02:12,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:12,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:12,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 00:02:12,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:02:12,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 00:02:12,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:13,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:13,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:13,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:13,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:13,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:13,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:02:13,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:13,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:13,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:13,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:13,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:13,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:13,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-14 00:02:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:13,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:13,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:13,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:13,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:13,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:02:13,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:13,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:13,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:13,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:13,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:13,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-10-14 00:02:13,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217451839] [2020-10-14 00:02:13,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:13,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 00:02:13,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216462014] [2020-10-14 00:02:13,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 00:02:13,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:13,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 00:02:13,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 00:02:13,113 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 15 states. [2020-10-14 00:02:14,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:14,118 INFO L93 Difference]: Finished difference Result 229 states and 234 transitions. [2020-10-14 00:02:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 00:02:14,119 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-10-14 00:02:14,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:14,122 INFO L225 Difference]: With dead ends: 229 [2020-10-14 00:02:14,122 INFO L226 Difference]: Without dead ends: 188 [2020-10-14 00:02:14,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-14 00:02:14,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-14 00:02:14,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 74. [2020-10-14 00:02:14,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-14 00:02:14,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-14 00:02:14,147 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 67 [2020-10-14 00:02:14,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:14,148 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-14 00:02:14,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 00:02:14,148 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-14 00:02:14,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 00:02:14,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:14,154 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:14,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 00:02:14,154 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:14,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:14,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1807722285, now seen corresponding path program 5 times [2020-10-14 00:02:14,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:14,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047962123] [2020-10-14 00:02:14,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:14,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:14,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:14,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:16,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:19,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:19,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 00:02:19,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:02:19,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 00:02:19,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:19,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:19,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 00:02:19,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:02:19,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 00:02:19,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:19,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:19,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:19,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:19,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:19,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:19,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:02:19,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:19,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:19,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:19,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:19,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:19,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:19,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-14 00:02:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:19,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:19,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:19,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:19,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:19,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:19,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:19,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:19,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:19,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:19,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:19,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-10-14 00:02:19,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047962123] [2020-10-14 00:02:19,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:19,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 00:02:19,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157325846] [2020-10-14 00:02:19,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 00:02:19,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:19,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 00:02:19,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 00:02:19,364 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 16 states. [2020-10-14 00:02:20,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:20,552 INFO L93 Difference]: Finished difference Result 245 states and 250 transitions. [2020-10-14 00:02:20,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 00:02:20,553 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-10-14 00:02:20,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:20,555 INFO L225 Difference]: With dead ends: 245 [2020-10-14 00:02:20,555 INFO L226 Difference]: Without dead ends: 202 [2020-10-14 00:02:20,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-14 00:02:20,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-14 00:02:20,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 78. [2020-10-14 00:02:20,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-14 00:02:20,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-14 00:02:20,579 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 71 [2020-10-14 00:02:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:20,580 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-14 00:02:20,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 00:02:20,580 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-14 00:02:20,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 00:02:20,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:20,590 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:20,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 00:02:20,591 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:20,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:20,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1202016169, now seen corresponding path program 6 times [2020-10-14 00:02:20,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:20,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222758146] [2020-10-14 00:02:20,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:20,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:20,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:22,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:24,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:26,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:26,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 00:02:26,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:02:26,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5926 [2020-10-14 00:02:26,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:26,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:26,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 00:02:26,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:02:26,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 00:02:26,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:26,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:26,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:26,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:26,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:26,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:26,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:02:26,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:26,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:26,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:26,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:26,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:26,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:26,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-14 00:02:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:26,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:26,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:26,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:26,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:26,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:26,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:26,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:26,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:26,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:26,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:26,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-14 00:02:26,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222758146] [2020-10-14 00:02:26,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:26,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 00:02:26,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482632898] [2020-10-14 00:02:26,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 00:02:26,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:26,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 00:02:26,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 00:02:26,730 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 17 states. [2020-10-14 00:02:27,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:27,724 INFO L93 Difference]: Finished difference Result 261 states and 266 transitions. [2020-10-14 00:02:27,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 00:02:27,725 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2020-10-14 00:02:27,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:27,727 INFO L225 Difference]: With dead ends: 261 [2020-10-14 00:02:27,727 INFO L226 Difference]: Without dead ends: 216 [2020-10-14 00:02:27,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-14 00:02:27,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-14 00:02:27,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 82. [2020-10-14 00:02:27,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 00:02:27,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-14 00:02:27,744 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 75 [2020-10-14 00:02:27,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:27,745 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-14 00:02:27,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 00:02:27,745 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-14 00:02:27,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 00:02:27,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:27,748 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:27,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 00:02:27,749 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:27,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:27,749 INFO L82 PathProgramCache]: Analyzing trace with hash 563300901, now seen corresponding path program 7 times [2020-10-14 00:02:27,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:27,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69475428] [2020-10-14 00:02:27,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:27,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:27,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:29,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:32,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:33,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:33,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 00:02:33,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:02:33,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5608 [2020-10-14 00:02:33,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:33,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:33,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 00:02:33,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:02:33,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 00:02:33,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:33,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:33,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:33,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:33,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:33,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:33,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:02:33,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:33,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:33,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:33,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:33,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:33,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:33,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-14 00:02:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:33,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:33,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:33,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:33,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:33,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:33,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:33,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:33,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:33,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:33,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:33,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-14 00:02:33,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69475428] [2020-10-14 00:02:33,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:33,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 00:02:33,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145261987] [2020-10-14 00:02:33,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 00:02:33,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:33,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 00:02:33,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 00:02:33,597 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 18 states. [2020-10-14 00:02:34,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:34,597 INFO L93 Difference]: Finished difference Result 277 states and 282 transitions. [2020-10-14 00:02:34,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 00:02:34,598 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-10-14 00:02:34,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:34,599 INFO L225 Difference]: With dead ends: 277 [2020-10-14 00:02:34,599 INFO L226 Difference]: Without dead ends: 230 [2020-10-14 00:02:34,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 00:02:34,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-14 00:02:34,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 86. [2020-10-14 00:02:34,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-14 00:02:34,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-14 00:02:34,616 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 79 [2020-10-14 00:02:34,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:34,617 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-14 00:02:34,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 00:02:34,617 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-14 00:02:34,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-14 00:02:34,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:34,618 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:34,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 00:02:34,618 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:34,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:34,618 INFO L82 PathProgramCache]: Analyzing trace with hash -896231775, now seen corresponding path program 8 times [2020-10-14 00:02:34,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:34,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557887546] [2020-10-14 00:02:34,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:34,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:34,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:34,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:36,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:39,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:39,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-14 00:02:39,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:02:39,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-14 00:02:39,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:39,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:39,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 00:02:39,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:02:39,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 00:02:39,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:39,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:39,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:39,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:39,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:39,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:39,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:39,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:39,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:39,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:39,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:39,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:39,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:39,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-14 00:02:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:39,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:39,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:39,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:39,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:39,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:39,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:39,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:39,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:39,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:39,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:39,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2020-10-14 00:02:39,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557887546] [2020-10-14 00:02:39,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:39,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 00:02:39,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434195362] [2020-10-14 00:02:39,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 00:02:39,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:39,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 00:02:39,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 00:02:39,893 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 19 states. [2020-10-14 00:02:41,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:41,014 INFO L93 Difference]: Finished difference Result 293 states and 298 transitions. [2020-10-14 00:02:41,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 00:02:41,015 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2020-10-14 00:02:41,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:41,017 INFO L225 Difference]: With dead ends: 293 [2020-10-14 00:02:41,017 INFO L226 Difference]: Without dead ends: 244 [2020-10-14 00:02:41,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 00:02:41,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-14 00:02:41,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 90. [2020-10-14 00:02:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-14 00:02:41,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-14 00:02:41,029 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 83 [2020-10-14 00:02:41,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:41,029 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-14 00:02:41,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 00:02:41,030 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-14 00:02:41,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-14 00:02:41,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:41,031 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:41,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 00:02:41,031 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:41,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:41,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1161049373, now seen corresponding path program 9 times [2020-10-14 00:02:41,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:41,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784748427] [2020-10-14 00:02:41,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:41,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:41,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:42,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:45,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:52,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:52,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-14 00:02:52,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:02:52,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10951 [2020-10-14 00:02:52,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:52,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:52,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 00:02:52,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-14 00:02:52,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 00:02:52,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:52,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:52,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:52,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:52,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:52,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:52,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:02:52,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:52,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:52,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:52,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:52,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:52,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:52,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-14 00:02:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:52,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:52,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:52,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:52,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:52,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:52,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:52,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:52,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:52,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:52,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:52,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2020-10-14 00:02:52,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784748427] [2020-10-14 00:02:52,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:52,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 00:02:52,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961979365] [2020-10-14 00:02:52,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 00:02:52,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:52,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 00:02:52,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 00:02:52,250 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 20 states. [2020-10-14 00:02:53,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:53,408 INFO L93 Difference]: Finished difference Result 309 states and 314 transitions. [2020-10-14 00:02:53,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 00:02:53,410 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 87 [2020-10-14 00:02:53,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:53,412 INFO L225 Difference]: With dead ends: 309 [2020-10-14 00:02:53,412 INFO L226 Difference]: Without dead ends: 258 [2020-10-14 00:02:53,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 00:02:53,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-14 00:02:53,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 94. [2020-10-14 00:02:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-14 00:02:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-14 00:02:53,424 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 87 [2020-10-14 00:02:53,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:53,425 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-14 00:02:53,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 00:02:53,425 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-14 00:02:53,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-14 00:02:53,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:53,426 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:53,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 00:02:53,426 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:53,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:53,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1165829529, now seen corresponding path program 10 times [2020-10-14 00:02:53,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:53,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042735070] [2020-10-14 00:02:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:53,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:53,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:56,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:59,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:59,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 00:02:59,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:02:59,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6430 [2020-10-14 00:02:59,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:59,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:59,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 00:02:59,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:02:59,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 00:02:59,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:00,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:00,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:00,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:00,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:00,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:00,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:03:00,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:00,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:00,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:00,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:00,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:00,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:00,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-14 00:03:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:00,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:00,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:00,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:03:00,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:00,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:03:00,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:00,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:00,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:00,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:03:00,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:00,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-10-14 00:03:00,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042735070] [2020-10-14 00:03:00,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:00,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 00:03:00,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800780622] [2020-10-14 00:03:00,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 00:03:00,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:00,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 00:03:00,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 00:03:00,136 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 21 states. [2020-10-14 00:03:01,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:01,385 INFO L93 Difference]: Finished difference Result 325 states and 330 transitions. [2020-10-14 00:03:01,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 00:03:01,386 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 91 [2020-10-14 00:03:01,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:01,389 INFO L225 Difference]: With dead ends: 325 [2020-10-14 00:03:01,389 INFO L226 Difference]: Without dead ends: 272 [2020-10-14 00:03:01,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 00:03:01,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-14 00:03:01,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 98. [2020-10-14 00:03:01,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-14 00:03:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-10-14 00:03:01,402 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 91 [2020-10-14 00:03:01,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:01,402 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-10-14 00:03:01,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 00:03:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-10-14 00:03:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-14 00:03:01,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:01,403 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:01,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 00:03:01,404 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:01,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:01,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1325766635, now seen corresponding path program 11 times [2020-10-14 00:03:01,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:01,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814115684] [2020-10-14 00:03:01,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:01,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:01,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:04,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:08,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:08,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-14 00:03:08,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:03:08,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6595 [2020-10-14 00:03:08,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:08,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:08,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 00:03:08,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:03:08,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 00:03:08,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:08,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:08,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:08,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:08,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:08,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:08,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:03:08,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:08,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:08,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:08,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:08,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:08,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:08,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-14 00:03:08,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:08,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:08,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:08,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:03:08,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:08,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:03:08,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:08,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:08,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:08,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:03:08,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:08,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2020-10-14 00:03:08,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814115684] [2020-10-14 00:03:08,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:08,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 00:03:08,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466759610] [2020-10-14 00:03:08,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 00:03:08,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:08,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 00:03:08,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 00:03:08,298 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 22 states. [2020-10-14 00:03:09,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:09,653 INFO L93 Difference]: Finished difference Result 341 states and 346 transitions. [2020-10-14 00:03:09,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 00:03:09,654 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 95 [2020-10-14 00:03:09,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:09,657 INFO L225 Difference]: With dead ends: 341 [2020-10-14 00:03:09,657 INFO L226 Difference]: Without dead ends: 286 [2020-10-14 00:03:09,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 00:03:09,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-14 00:03:09,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 102. [2020-10-14 00:03:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-14 00:03:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-10-14 00:03:09,669 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 95 [2020-10-14 00:03:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:09,670 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-10-14 00:03:09,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 00:03:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-10-14 00:03:09,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-14 00:03:09,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:09,671 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:09,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 00:03:09,671 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:09,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:09,672 INFO L82 PathProgramCache]: Analyzing trace with hash 515308689, now seen corresponding path program 12 times [2020-10-14 00:03:09,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:09,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050863422] [2020-10-14 00:03:09,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:09,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:09,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:10,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:17,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:17,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-14 00:03:17,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:03:17,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7626 [2020-10-14 00:03:17,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:17,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:17,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 00:03:17,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:03:17,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 00:03:17,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:17,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:17,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:17,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:17,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:17,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:17,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:03:17,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:17,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:17,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:17,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:17,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:17,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:17,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-14 00:03:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:17,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:17,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:17,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:03:17,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:17,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:03:17,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:17,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:17,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:17,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:03:17,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:17,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-10-14 00:03:17,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050863422] [2020-10-14 00:03:17,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:17,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 00:03:17,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202764788] [2020-10-14 00:03:17,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 00:03:17,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:17,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 00:03:17,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 00:03:17,605 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 23 states. [2020-10-14 00:03:19,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:19,111 INFO L93 Difference]: Finished difference Result 357 states and 362 transitions. [2020-10-14 00:03:19,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 00:03:19,114 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 99 [2020-10-14 00:03:19,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:19,116 INFO L225 Difference]: With dead ends: 357 [2020-10-14 00:03:19,116 INFO L226 Difference]: Without dead ends: 300 [2020-10-14 00:03:19,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 00:03:19,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-14 00:03:19,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 106. [2020-10-14 00:03:19,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-14 00:03:19,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-10-14 00:03:19,130 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 99 [2020-10-14 00:03:19,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:19,131 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-10-14 00:03:19,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 00:03:19,131 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-10-14 00:03:19,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-14 00:03:19,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:19,132 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:19,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 00:03:19,132 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:19,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1463673613, now seen corresponding path program 13 times [2020-10-14 00:03:19,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:19,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151986230] [2020-10-14 00:03:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:19,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:19,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:21,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:28,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:28,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-14 00:03:28,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:03:28,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9059 [2020-10-14 00:03:28,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:28,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:28,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 00:03:28,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 00:03:28,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 00:03:28,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:28,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:28,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:28,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:28,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:28,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:28,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:03:28,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:28,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:28,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:28,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:28,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:28,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:28,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-14 00:03:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:28,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:28,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:28,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:03:28,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:28,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:03:28,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:28,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:28,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:28,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:03:28,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:28,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2020-10-14 00:03:28,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151986230] [2020-10-14 00:03:28,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:28,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 00:03:28,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949456217] [2020-10-14 00:03:28,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 00:03:28,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:28,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 00:03:28,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 00:03:28,536 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 24 states. [2020-10-14 00:03:30,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:30,121 INFO L93 Difference]: Finished difference Result 373 states and 378 transitions. [2020-10-14 00:03:30,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 00:03:30,122 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 103 [2020-10-14 00:03:30,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:30,124 INFO L225 Difference]: With dead ends: 373 [2020-10-14 00:03:30,124 INFO L226 Difference]: Without dead ends: 314 [2020-10-14 00:03:30,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 00:03:30,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-14 00:03:30,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 110. [2020-10-14 00:03:30,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-14 00:03:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-10-14 00:03:30,139 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 103 [2020-10-14 00:03:30,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:30,140 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-10-14 00:03:30,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 00:03:30,140 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-10-14 00:03:30,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-14 00:03:30,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:30,141 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:30,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 00:03:30,141 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:30,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:30,142 INFO L82 PathProgramCache]: Analyzing trace with hash -728097911, now seen corresponding path program 14 times [2020-10-14 00:03:30,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:30,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120727078] [2020-10-14 00:03:30,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:30,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:30,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:34,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:40,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:40,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-14 00:03:40,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:03:40,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10469 [2020-10-14 00:03:40,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:40,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:40,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 00:03:40,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-14 00:03:40,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 00:03:40,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:40,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:40,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:40,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:40,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:40,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:40,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:03:40,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:40,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:40,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:40,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:40,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:40,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:40,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-14 00:03:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:40,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:40,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:40,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:03:40,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:40,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:03:40,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:40,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:40,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:40,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:03:40,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:40,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:41,001 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2020-10-14 00:03:41,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120727078] [2020-10-14 00:03:41,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:41,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 00:03:41,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012652953] [2020-10-14 00:03:41,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 00:03:41,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:41,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 00:03:41,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 00:03:41,002 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 25 states. [2020-10-14 00:03:42,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:42,702 INFO L93 Difference]: Finished difference Result 389 states and 394 transitions. [2020-10-14 00:03:42,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 00:03:42,703 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 107 [2020-10-14 00:03:42,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:42,705 INFO L225 Difference]: With dead ends: 389 [2020-10-14 00:03:42,705 INFO L226 Difference]: Without dead ends: 328 [2020-10-14 00:03:42,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 00:03:42,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-14 00:03:42,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 114. [2020-10-14 00:03:42,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-14 00:03:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-10-14 00:03:42,722 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 107 [2020-10-14 00:03:42,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:42,722 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-10-14 00:03:42,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 00:03:42,722 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-10-14 00:03:42,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-14 00:03:42,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:42,723 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:42,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 00:03:42,724 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:42,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:42,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1112974853, now seen corresponding path program 15 times [2020-10-14 00:03:42,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:42,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768650264] [2020-10-14 00:03:42,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:42,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:42,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:47,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:47,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-14 00:03:47,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:03:47,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 00:03:47,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:47,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:47,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 00:03:47,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-14 00:03:47,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 00:03:47,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:48,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:48,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:48,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:48,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:48,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:48,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:03:48,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:48,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:48,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:48,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:48,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:48,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:48,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-14 00:03:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:48,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:48,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:48,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:03:48,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:48,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:03:48,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:48,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:48,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:48,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:03:48,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:48,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2020-10-14 00:03:48,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768650264] [2020-10-14 00:03:48,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:48,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 00:03:48,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965287505] [2020-10-14 00:03:48,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 00:03:48,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:48,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 00:03:48,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 00:03:48,135 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 26 states. [2020-10-14 00:03:49,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:49,884 INFO L93 Difference]: Finished difference Result 405 states and 410 transitions. [2020-10-14 00:03:49,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 00:03:49,885 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 111 [2020-10-14 00:03:49,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:49,887 INFO L225 Difference]: With dead ends: 405 [2020-10-14 00:03:49,888 INFO L226 Difference]: Without dead ends: 342 [2020-10-14 00:03:49,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 00:03:49,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-10-14 00:03:49,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 118. [2020-10-14 00:03:49,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-14 00:03:49,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2020-10-14 00:03:49,905 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 111 [2020-10-14 00:03:49,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:49,906 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2020-10-14 00:03:49,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 00:03:49,906 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2020-10-14 00:03:49,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-14 00:03:49,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:49,907 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:49,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 00:03:49,908 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:49,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:49,908 INFO L82 PathProgramCache]: Analyzing trace with hash -42040703, now seen corresponding path program 16 times [2020-10-14 00:03:49,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:49,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463497384] [2020-10-14 00:03:49,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:49,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:49,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:55,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:55,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-14 00:03:55,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:03:55,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5138 [2020-10-14 00:03:55,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:55,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:55,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 00:03:55,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:03:55,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 00:03:55,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:55,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:55,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:55,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:55,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:55,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:55,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:03:55,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:55,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:55,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:55,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:55,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:55,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:55,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-14 00:03:55,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:55,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:55,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:55,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:03:55,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:55,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:03:55,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:55,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:55,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:55,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:03:55,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:55,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:55,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2020-10-14 00:03:55,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463497384] [2020-10-14 00:03:55,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:55,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 00:03:55,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301655594] [2020-10-14 00:03:55,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 00:03:55,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:55,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 00:03:55,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 00:03:55,467 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 27 states. [2020-10-14 00:03:57,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:57,339 INFO L93 Difference]: Finished difference Result 421 states and 426 transitions. [2020-10-14 00:03:57,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 00:03:57,340 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 115 [2020-10-14 00:03:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:57,343 INFO L225 Difference]: With dead ends: 421 [2020-10-14 00:03:57,343 INFO L226 Difference]: Without dead ends: 356 [2020-10-14 00:03:57,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 00:03:57,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-14 00:03:57,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 122. [2020-10-14 00:03:57,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-14 00:03:57,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2020-10-14 00:03:57,360 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 115 [2020-10-14 00:03:57,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:57,360 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2020-10-14 00:03:57,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 00:03:57,360 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2020-10-14 00:03:57,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-14 00:03:57,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:57,361 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:57,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 00:03:57,362 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:57,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:57,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1801670403, now seen corresponding path program 17 times [2020-10-14 00:03:57,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:57,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384603457] [2020-10-14 00:03:57,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:57,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:57,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:02,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:02,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-14 00:04:02,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:04:02,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-14 00:04:02,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:02,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:02,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 00:04:02,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:02,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 00:04:02,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:04:02,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:02,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:02,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:02,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:02,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:02,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:04:02,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:02,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:02,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:02,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:02,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:02,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:02,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-14 00:04:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:02,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:02,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:02,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:04:02,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:02,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:04:02,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:02,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:02,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:02,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:04:02,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:02,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2020-10-14 00:04:02,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384603457] [2020-10-14 00:04:02,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:02,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 00:04:02,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791172616] [2020-10-14 00:04:02,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 00:04:02,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:02,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 00:04:02,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 00:04:02,866 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 28 states. [2020-10-14 00:04:04,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:04,851 INFO L93 Difference]: Finished difference Result 437 states and 442 transitions. [2020-10-14 00:04:04,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-14 00:04:04,852 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 119 [2020-10-14 00:04:04,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:04,855 INFO L225 Difference]: With dead ends: 437 [2020-10-14 00:04:04,856 INFO L226 Difference]: Without dead ends: 370 [2020-10-14 00:04:04,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 00:04:04,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-14 00:04:04,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 126. [2020-10-14 00:04:04,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-14 00:04:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-10-14 00:04:04,875 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 119 [2020-10-14 00:04:04,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:04,875 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-10-14 00:04:04,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 00:04:04,876 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-10-14 00:04:04,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-14 00:04:04,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:04,877 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:04,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 00:04:04,877 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:04,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:04,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1203515769, now seen corresponding path program 18 times [2020-10-14 00:04:04,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:04,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352021389] [2020-10-14 00:04:04,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:04,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:04,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:04,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:09,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:09,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-14 00:04:09,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:04:09,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-14 00:04:09,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:09,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:09,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 00:04:09,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-14 00:04:09,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 00:04:09,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:10,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:10,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:10,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:10,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:10,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:10,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:10,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:04:10,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:10,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:10,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:10,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:10,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:10,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:10,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-10-14 00:04:10,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:10,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:10,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:10,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:04:10,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:10,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:04:10,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:10,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:10,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:10,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:04:10,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:10,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 2 proven. 625 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2020-10-14 00:04:10,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352021389] [2020-10-14 00:04:10,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:10,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 00:04:10,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862591066] [2020-10-14 00:04:10,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 00:04:10,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:10,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 00:04:10,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 00:04:10,407 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 29 states. [2020-10-14 00:04:12,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:12,749 INFO L93 Difference]: Finished difference Result 453 states and 458 transitions. [2020-10-14 00:04:12,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-14 00:04:12,749 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 123 [2020-10-14 00:04:12,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:12,752 INFO L225 Difference]: With dead ends: 453 [2020-10-14 00:04:12,752 INFO L226 Difference]: Without dead ends: 384 [2020-10-14 00:04:12,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 00:04:12,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-10-14 00:04:12,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 130. [2020-10-14 00:04:12,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-14 00:04:12,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2020-10-14 00:04:12,770 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 123 [2020-10-14 00:04:12,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:12,770 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2020-10-14 00:04:12,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 00:04:12,770 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2020-10-14 00:04:12,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-14 00:04:12,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:12,771 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:12,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 00:04:12,771 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:12,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:12,772 INFO L82 PathProgramCache]: Analyzing trace with hash -2006449163, now seen corresponding path program 19 times [2020-10-14 00:04:12,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:12,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456604341] [2020-10-14 00:04:12,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:12,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:12,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:17,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:17,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-14 00:04:17,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:04:17,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-14 00:04:17,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:17,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:17,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 00:04:17,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:17,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 00:04:17,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:18,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:18,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:18,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:18,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:18,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:18,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:04:18,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:18,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:18,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:18,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:18,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:18,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:18,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-14 00:04:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:18,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:18,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:18,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:04:18,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:18,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:04:18,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:18,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:18,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:18,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:04:18,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:18,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1356 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2020-10-14 00:04:18,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456604341] [2020-10-14 00:04:18,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:18,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 00:04:18,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020778256] [2020-10-14 00:04:18,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 00:04:18,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:18,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 00:04:18,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 00:04:18,325 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 30 states. [2020-10-14 00:04:20,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:20,644 INFO L93 Difference]: Finished difference Result 469 states and 474 transitions. [2020-10-14 00:04:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-14 00:04:20,644 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 127 [2020-10-14 00:04:20,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:20,647 INFO L225 Difference]: With dead ends: 469 [2020-10-14 00:04:20,647 INFO L226 Difference]: Without dead ends: 398 [2020-10-14 00:04:20,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 00:04:20,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-14 00:04:20,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 134. [2020-10-14 00:04:20,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-14 00:04:20,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-10-14 00:04:20,673 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 127 [2020-10-14 00:04:20,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:20,674 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-10-14 00:04:20,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 00:04:20,674 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-10-14 00:04:20,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-14 00:04:20,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:20,675 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:20,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 00:04:20,676 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:20,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:20,676 INFO L82 PathProgramCache]: Analyzing trace with hash 2041260145, now seen corresponding path program 20 times [2020-10-14 00:04:20,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:20,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554399881] [2020-10-14 00:04:20,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:20,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:20,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:25,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:25,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-14 00:04:25,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:04:25,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5182 [2020-10-14 00:04:25,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:25,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:25,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 00:04:25,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:25,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 00:04:25,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:26,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:26,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:26,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:26,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:26,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:26,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:04:26,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:26,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:26,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:26,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:26,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:26,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:26,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-14 00:04:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:26,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:26,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:26,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:04:26,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:26,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:04:26,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:26,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:26,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:26,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:04:26,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:26,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:04:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1462 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2020-10-14 00:04:26,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554399881] [2020-10-14 00:04:26,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:26,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 00:04:26,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822866541] [2020-10-14 00:04:26,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 00:04:26,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:26,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 00:04:26,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 00:04:26,412 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 31 states. [2020-10-14 00:04:28,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:28,846 INFO L93 Difference]: Finished difference Result 485 states and 490 transitions. [2020-10-14 00:04:28,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-14 00:04:28,846 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 131 [2020-10-14 00:04:28,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:28,849 INFO L225 Difference]: With dead ends: 485 [2020-10-14 00:04:28,849 INFO L226 Difference]: Without dead ends: 412 [2020-10-14 00:04:28,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 00:04:28,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-10-14 00:04:28,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 138. [2020-10-14 00:04:28,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-14 00:04:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2020-10-14 00:04:28,875 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 131 [2020-10-14 00:04:28,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:28,875 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2020-10-14 00:04:28,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 00:04:28,876 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2020-10-14 00:04:28,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-14 00:04:28,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:28,877 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:28,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 00:04:28,877 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:28,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:28,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1880137453, now seen corresponding path program 21 times [2020-10-14 00:04:28,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:28,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782333509] [2020-10-14 00:04:28,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:28,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:29,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:34,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:34,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-14 00:04:34,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:04:34,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5124 [2020-10-14 00:04:34,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:34,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:34,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 00:04:34,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-14 00:04:34,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 00:04:34,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:34,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:34,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:34,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:34,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:34,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:34,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 00:04:34,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:34,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:34,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:34,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:34,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:34,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:04:34,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-14 00:04:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:34,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:34,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:34,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:04:34,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:34,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:04:34,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:34,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:34,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:34,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:04:34,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:34,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:04:34,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1572 backedges. 2 proven. 784 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-10-14 00:04:34,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782333509] [2020-10-14 00:04:34,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:34,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 00:04:34,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371523813] [2020-10-14 00:04:34,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 00:04:34,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:34,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 00:04:34,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 00:04:34,737 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 32 states. [2020-10-14 00:04:37,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:37,600 INFO L93 Difference]: Finished difference Result 501 states and 506 transitions. [2020-10-14 00:04:37,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-14 00:04:37,601 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2020-10-14 00:04:37,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:37,603 INFO L225 Difference]: With dead ends: 501 [2020-10-14 00:04:37,604 INFO L226 Difference]: Without dead ends: 426 [2020-10-14 00:04:37,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 00:04:37,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-14 00:04:37,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 142. [2020-10-14 00:04:37,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-14 00:04:37,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2020-10-14 00:04:37,631 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 135 [2020-10-14 00:04:37,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:37,631 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2020-10-14 00:04:37,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 00:04:37,632 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2020-10-14 00:04:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-14 00:04:37,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:37,633 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:37,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 00:04:37,633 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:37,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:37,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1906534249, now seen corresponding path program 22 times [2020-10-14 00:04:37,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:37,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532655281] [2020-10-14 00:04:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:37,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:37,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:42,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:42,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-14 00:04:42,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:04:42,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5220 [2020-10-14 00:04:42,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:42,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:42,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 00:04:42,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:42,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 00:04:42,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:43,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:43,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:43,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:43,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:43,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:43,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:04:43,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:43,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:43,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:43,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:43,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:43,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:43,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-10-14 00:04:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:43,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:43,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:43,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:04:43,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:43,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:04:43,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:43,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:43,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:43,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:04:43,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:43,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1686 backedges. 2 proven. 841 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2020-10-14 00:04:43,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532655281] [2020-10-14 00:04:43,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:43,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 00:04:43,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588375654] [2020-10-14 00:04:43,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 00:04:43,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:43,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 00:04:43,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 00:04:43,541 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 33 states. [2020-10-14 00:04:46,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:46,323 INFO L93 Difference]: Finished difference Result 517 states and 522 transitions. [2020-10-14 00:04:46,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-14 00:04:46,324 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 139 [2020-10-14 00:04:46,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:46,326 INFO L225 Difference]: With dead ends: 517 [2020-10-14 00:04:46,326 INFO L226 Difference]: Without dead ends: 440 [2020-10-14 00:04:46,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 00:04:46,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-10-14 00:04:46,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 146. [2020-10-14 00:04:46,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-14 00:04:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2020-10-14 00:04:46,355 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 139 [2020-10-14 00:04:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:46,355 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2020-10-14 00:04:46,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 00:04:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2020-10-14 00:04:46,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-14 00:04:46,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:46,356 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:46,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 00:04:46,357 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:46,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:46,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1242660379, now seen corresponding path program 23 times [2020-10-14 00:04:46,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:46,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779544420] [2020-10-14 00:04:46,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:46,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:46,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:51,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:51,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-14 00:04:51,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:04:51,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-14 00:04:51,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:51,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:51,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 00:04:51,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:51,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 00:04:51,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:52,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:52,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:52,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:52,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:52,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:52,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:04:52,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:52,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:52,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:52,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:52,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:52,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:52,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-14 00:04:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:52,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:52,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:52,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:04:52,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:52,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:04:52,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:52,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:52,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:52,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:04:52,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:52,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1804 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked. [2020-10-14 00:04:52,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779544420] [2020-10-14 00:04:52,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:52,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 00:04:52,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504613790] [2020-10-14 00:04:52,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 00:04:52,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:52,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 00:04:52,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 00:04:52,091 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 34 states. [2020-10-14 00:04:54,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:54,983 INFO L93 Difference]: Finished difference Result 533 states and 538 transitions. [2020-10-14 00:04:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-14 00:04:54,984 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 143 [2020-10-14 00:04:54,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:54,987 INFO L225 Difference]: With dead ends: 533 [2020-10-14 00:04:54,987 INFO L226 Difference]: Without dead ends: 454 [2020-10-14 00:04:54,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-14 00:04:54,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-10-14 00:04:55,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 150. [2020-10-14 00:04:55,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-14 00:04:55,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2020-10-14 00:04:55,009 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 143 [2020-10-14 00:04:55,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:55,010 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2020-10-14 00:04:55,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 00:04:55,010 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2020-10-14 00:04:55,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-14 00:04:55,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:55,011 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:55,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 00:04:55,011 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:55,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:55,011 INFO L82 PathProgramCache]: Analyzing trace with hash 637333089, now seen corresponding path program 24 times [2020-10-14 00:04:55,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:55,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697304833] [2020-10-14 00:04:55,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:55,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:55,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:00,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:00,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-14 00:05:00,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:05:00,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-14 00:05:00,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:00,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:00,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 00:05:00,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:05:00,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 00:05:00,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:00,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:05:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:00,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:00,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:00,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:05:00,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:05:00,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:05:00,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:00,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:00,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:05:00,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:05:00,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:05:00,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:00,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-10-14 00:05:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:05:00,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:05:00,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:05:00,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:05:00,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:05:00,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:05:00,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:05:00,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:05:00,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:05:00,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:05:00,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:05:00,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:05:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 2 proven. 961 refuted. 0 times theorem prover too weak. 963 trivial. 0 not checked. [2020-10-14 00:05:00,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697304833] [2020-10-14 00:05:00,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:05:00,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 00:05:00,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769048704] [2020-10-14 00:05:00,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 00:05:00,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:05:00,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 00:05:00,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 00:05:00,803 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 35 states.