/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:58:32,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:58:32,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:58:32,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:58:32,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:58:32,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:58:32,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:58:32,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:58:32,646 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:58:32,649 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:58:32,650 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:58:32,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:58:32,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:58:32,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:58:32,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:58:32,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:58:32,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:58:32,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:58:32,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:58:32,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:58:32,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:58:32,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:58:32,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:58:32,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:58:32,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:58:32,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:58:32,692 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:58:32,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:58:32,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:58:32,694 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:58:32,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:58:32,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:58:32,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:58:32,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:58:32,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:58:32,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:58:32,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:58:32,704 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:58:32,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:58:32,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:58:32,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:58:32,707 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 23:58:32,743 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:58:32,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:58:32,746 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:58:32,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:58:32,746 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:58:32,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:58:32,746 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:58:32,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:58:32,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:58:32,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:58:32,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:58:32,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:58:32,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:58:32,749 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:58:32,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:58:32,749 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:58:32,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:58:32,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:58:32,750 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:58:32,750 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:58:32,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:58:32,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:58:32,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:58:32,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:58:32,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:58:32,751 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:58:32,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:58:32,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:58:32,752 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:58:32,752 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:58:33,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:58:33,087 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:58:33,093 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:58:33,095 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:58:33,095 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:58:33,096 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c [2020-10-14 23:58:33,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd066bd91/861d2cb9da92422ea9dc8f96881d7d7a/FLAG728d74073 [2020-10-14 23:58:33,632 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:58:33,633 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de52.c [2020-10-14 23:58:33,638 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd066bd91/861d2cb9da92422ea9dc8f96881d7d7a/FLAG728d74073 [2020-10-14 23:58:34,011 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd066bd91/861d2cb9da92422ea9dc8f96881d7d7a [2020-10-14 23:58:34,021 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:58:34,022 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:58:34,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:58:34,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:58:34,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:58:34,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:34" (1/1) ... [2020-10-14 23:58:34,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78323104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:34, skipping insertion in model container [2020-10-14 23:58:34,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:34" (1/1) ... [2020-10-14 23:58:34,040 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:58:34,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:58:34,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:58:34,236 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:58:34,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:58:34,269 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:58:34,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:34 WrapperNode [2020-10-14 23:58:34,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:58:34,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:58:34,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:58:34,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:58:34,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:34" (1/1) ... [2020-10-14 23:58:34,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:34" (1/1) ... [2020-10-14 23:58:34,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:34" (1/1) ... [2020-10-14 23:58:34,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:34" (1/1) ... [2020-10-14 23:58:34,374 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:34" (1/1) ... [2020-10-14 23:58:34,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:34" (1/1) ... [2020-10-14 23:58:34,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:34" (1/1) ... [2020-10-14 23:58:34,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:58:34,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:58:34,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:58:34,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:58:34,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:34" (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 23:58:34,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:58:34,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:58:34,449 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 23:58:34,449 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:58:34,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:58:34,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-14 23:58:34,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 23:58:34,449 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:58:34,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:58:34,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:58:34,694 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:58:34,694 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-14 23:58:34,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:34 BoogieIcfgContainer [2020-10-14 23:58:34,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:58:34,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:58:34,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:58:34,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:58:34,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:58:34" (1/3) ... [2020-10-14 23:58:34,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:34, skipping insertion in model container [2020-10-14 23:58:34,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:34" (2/3) ... [2020-10-14 23:58:34,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:34, skipping insertion in model container [2020-10-14 23:58:34,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:34" (3/3) ... [2020-10-14 23:58:34,710 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de52.c [2020-10-14 23:58:34,726 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:58:34,735 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:58:34,771 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:58:34,800 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:58:34,800 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:58:34,800 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:58:34,801 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:58:34,801 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:58:34,801 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:58:34,801 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:58:34,801 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:58:34,823 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-14 23:58:34,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 23:58:34,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:34,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:34,833 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:34,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:34,842 INFO L82 PathProgramCache]: Analyzing trace with hash -255424134, now seen corresponding path program 1 times [2020-10-14 23:58:34,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:34,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946221665] [2020-10-14 23:58:34,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:34,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:35,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:35,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:35,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:35,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:35,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:35,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 23:58:35,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:58:35,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 317 [2020-10-14 23:58:35,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:35,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:35,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:58:35,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:35,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:58:35,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:58:35,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:35,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:35,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:35,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:35,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:35,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:58:35,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:35,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:35,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:35,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:35,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:35,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:35,452 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 23:58:35,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946221665] [2020-10-14 23:58:35,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:58:35,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 23:58:35,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643450557] [2020-10-14 23:58:35,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:58:35,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:35,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:58:35,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:58:35,481 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-10-14 23:58:35,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:35,596 INFO L93 Difference]: Finished difference Result 54 states and 85 transitions. [2020-10-14 23:58:35,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:58:35,598 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-14 23:58:35,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:35,608 INFO L225 Difference]: With dead ends: 54 [2020-10-14 23:58:35,608 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 23:58:35,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:58:35,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 23:58:35,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-14 23:58:35,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 23:58:35,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2020-10-14 23:58:35,651 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 15 [2020-10-14 23:58:35,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:35,651 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2020-10-14 23:58:35,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:58:35,651 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2020-10-14 23:58:35,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:58:35,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:35,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:35,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:58:35,653 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:35,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:35,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1439862098, now seen corresponding path program 1 times [2020-10-14 23:58:35,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:35,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441950463] [2020-10-14 23:58:35,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:35,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:35,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:35,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:58:35,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:35,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-14 23:58:35,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:35,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:35,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:58:35,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:58:35,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 23:58:35,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:35,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:35,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:35,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:35,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:35,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:35,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:58:35,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:35,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:35,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:35,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:35,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:35,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:35,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441950463] [2020-10-14 23:58:35,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:58:35,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 23:58:35,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428846500] [2020-10-14 23:58:35,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 23:58:35,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:35,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 23:58:35,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:58:35,764 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand 3 states. [2020-10-14 23:58:35,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:35,812 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2020-10-14 23:58:35,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 23:58:35,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-14 23:58:35,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:35,818 INFO L225 Difference]: With dead ends: 35 [2020-10-14 23:58:35,818 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 23:58:35,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 23:58:35,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 23:58:35,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-14 23:58:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 23:58:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-14 23:58:35,840 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 16 [2020-10-14 23:58:35,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:35,841 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-14 23:58:35,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 23:58:35,846 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-14 23:58:35,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:58:35,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:35,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:35,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:58:35,848 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:35,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:35,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1452276799, now seen corresponding path program 1 times [2020-10-14 23:58:35,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:35,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523625364] [2020-10-14 23:58:35,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:35,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:35,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:35,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:36,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:36,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:36,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:58:36,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:36,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-14 23:58:36,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:36,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:36,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:58:36,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 23:58:36,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:58:36,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:58:36,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:36,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:36,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:36,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:36,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:36,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:58:36,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:36,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:36,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:36,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:36,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:36,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:36,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523625364] [2020-10-14 23:58:36,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:36,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:58:36,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728841382] [2020-10-14 23:58:36,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:58:36,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:36,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:58:36,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:58:36,225 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 7 states. [2020-10-14 23:58:36,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:36,332 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2020-10-14 23:58:36,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:58:36,333 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-14 23:58:36,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:36,334 INFO L225 Difference]: With dead ends: 45 [2020-10-14 23:58:36,334 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 23:58:36,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:58:36,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 23:58:36,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-14 23:58:36,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 23:58:36,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2020-10-14 23:58:36,340 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 16 [2020-10-14 23:58:36,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:36,341 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2020-10-14 23:58:36,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:58:36,341 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2020-10-14 23:58:36,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:58:36,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:36,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:36,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:58:36,343 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:36,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:36,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1698651309, now seen corresponding path program 1 times [2020-10-14 23:58:36,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:36,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790245220] [2020-10-14 23:58:36,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:36,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:36,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:36,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:36,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:58:36,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:58:36,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-14 23:58:36,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:36,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:36,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:58:36,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:36,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:58:36,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:36,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:36,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:36,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:36,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:36,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:36,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:58:36,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:36,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:36,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:36,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:36,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:36,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:58:36,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790245220] [2020-10-14 23:58:36,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:36,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 23:58:36,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473815119] [2020-10-14 23:58:36,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:58:36,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:36,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:58:36,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:58:36,636 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 4 states. [2020-10-14 23:58:36,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:36,675 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2020-10-14 23:58:36,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:58:36,675 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-14 23:58:36,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:36,676 INFO L225 Difference]: With dead ends: 34 [2020-10-14 23:58:36,677 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 23:58:36,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:58:36,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 23:58:36,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-14 23:58:36,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 23:58:36,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2020-10-14 23:58:36,689 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 18 [2020-10-14 23:58:36,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:36,690 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2020-10-14 23:58:36,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:58:36,691 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2020-10-14 23:58:36,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:58:36,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:36,693 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 23:58:36,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:58:36,694 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:36,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:36,694 INFO L82 PathProgramCache]: Analyzing trace with hash 2055309710, now seen corresponding path program 1 times [2020-10-14 23:58:36,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:36,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932135702] [2020-10-14 23:58:36,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:36,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:36,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:36,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:36,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:58:36,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:58:36,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-14 23:58:36,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:36,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:36,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:58:36,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:58:36,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:58:36,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:36,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:36,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:36,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:36,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:36,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:36,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:36,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:36,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:36,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:36,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:36,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:36,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 23:58:36,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932135702] [2020-10-14 23:58:36,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:36,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 23:58:36,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270322586] [2020-10-14 23:58:36,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:58:36,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:36,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:58:36,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:58:36,907 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand 4 states. [2020-10-14 23:58:36,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:36,940 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2020-10-14 23:58:36,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:58:36,940 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-14 23:58:36,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:36,941 INFO L225 Difference]: With dead ends: 41 [2020-10-14 23:58:36,942 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 23:58:36,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:58:36,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 23:58:36,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-10-14 23:58:36,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 23:58:36,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-14 23:58:36,949 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 19 [2020-10-14 23:58:36,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:36,950 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-14 23:58:36,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:58:36,950 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-14 23:58:36,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:58:36,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:36,951 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 23:58:36,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:58:36,952 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:36,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:36,952 INFO L82 PathProgramCache]: Analyzing trace with hash 652481311, now seen corresponding path program 1 times [2020-10-14 23:58:36,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:36,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930262835] [2020-10-14 23:58:36,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:36,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:36,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:37,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:37,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:58:37,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:58:37,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-14 23:58:37,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:37,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:37,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:58:37,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:58:37,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:58:37,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:37,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:37,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:37,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:37,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:37,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:37,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:37,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:37,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:37,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:37,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:37,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:37,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:58:37,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930262835] [2020-10-14 23:58:37,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:37,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 23:58:37,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589158221] [2020-10-14 23:58:37,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:58:37,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:37,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:58:37,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:58:37,068 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-14 23:58:37,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:37,116 INFO L93 Difference]: Finished difference Result 48 states and 67 transitions. [2020-10-14 23:58:37,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:58:37,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-14 23:58:37,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:37,118 INFO L225 Difference]: With dead ends: 48 [2020-10-14 23:58:37,118 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 23:58:37,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:58:37,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 23:58:37,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-10-14 23:58:37,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 23:58:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 55 transitions. [2020-10-14 23:58:37,127 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 55 transitions. Word has length 19 [2020-10-14 23:58:37,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:37,127 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 55 transitions. [2020-10-14 23:58:37,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:58:37,128 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 55 transitions. [2020-10-14 23:58:37,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:58:37,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:37,129 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:37,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:58:37,129 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:37,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:37,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1315744958, now seen corresponding path program 2 times [2020-10-14 23:58:37,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:37,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800897596] [2020-10-14 23:58:37,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:37,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:37,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:37,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:37,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:37,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:37,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:58:37,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:37,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-14 23:58:37,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:37,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:37,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:58:37,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:37,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:58:37,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:37,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:37,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:37,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:37,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:37,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:37,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:37,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:37,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:37,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:37,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:37,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:37,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:58:37,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800897596] [2020-10-14 23:58:37,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:37,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:58:37,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470603240] [2020-10-14 23:58:37,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:58:37,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:37,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:58:37,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:58:37,451 INFO L87 Difference]: Start difference. First operand 39 states and 55 transitions. Second operand 7 states. [2020-10-14 23:58:37,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:37,626 INFO L93 Difference]: Finished difference Result 84 states and 125 transitions. [2020-10-14 23:58:37,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:58:37,627 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-14 23:58:37,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:37,629 INFO L225 Difference]: With dead ends: 84 [2020-10-14 23:58:37,629 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 23:58:37,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:58:37,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 23:58:37,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2020-10-14 23:58:37,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 23:58:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2020-10-14 23:58:37,640 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 19 [2020-10-14 23:58:37,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:37,641 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2020-10-14 23:58:37,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:58:37,641 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2020-10-14 23:58:37,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:58:37,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:37,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:37,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:58:37,642 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:37,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:37,643 INFO L82 PathProgramCache]: Analyzing trace with hash -674370641, now seen corresponding path program 1 times [2020-10-14 23:58:37,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:37,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068788058] [2020-10-14 23:58:37,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:37,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:37,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:37,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:37,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:38,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:38,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:58:38,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:38,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 789 [2020-10-14 23:58:38,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:38,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:38,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:58:38,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:38,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:58:38,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:38,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:38,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:38,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:38,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:38,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:38,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:58:38,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:38,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:38,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:38,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:38,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:38,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:58:38,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068788058] [2020-10-14 23:58:38,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:38,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:58:38,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38243544] [2020-10-14 23:58:38,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:58:38,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:38,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:58:38,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:58:38,540 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand 7 states. [2020-10-14 23:58:38,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:38,636 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2020-10-14 23:58:38,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:58:38,637 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-14 23:58:38,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:38,638 INFO L225 Difference]: With dead ends: 60 [2020-10-14 23:58:38,638 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 23:58:38,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:58:38,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 23:58:38,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-14 23:58:38,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 23:58:38,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2020-10-14 23:58:38,652 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 20 [2020-10-14 23:58:38,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:38,654 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2020-10-14 23:58:38,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:58:38,654 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2020-10-14 23:58:38,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:58:38,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:38,660 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:38,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:58:38,661 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:38,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:38,661 INFO L82 PathProgramCache]: Analyzing trace with hash 2079729997, now seen corresponding path program 2 times [2020-10-14 23:58:38,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:38,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653409024] [2020-10-14 23:58:38,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:38,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:38,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:38,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:38,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:38,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:39,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:39,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:58:39,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:58:39,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 960 [2020-10-14 23:58:39,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:39,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:39,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:58:39,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:58:39,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:58:39,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:39,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:39,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:39,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:39,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:39,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:39,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:39,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:39,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:39,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:39,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:39,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:39,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:39,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:58:39,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653409024] [2020-10-14 23:58:39,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:39,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:58:39,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509384064] [2020-10-14 23:58:39,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:58:39,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:39,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:58:39,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:58:39,754 INFO L87 Difference]: Start difference. First operand 53 states and 73 transitions. Second operand 10 states. [2020-10-14 23:58:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:40,081 INFO L93 Difference]: Finished difference Result 97 states and 138 transitions. [2020-10-14 23:58:40,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:58:40,082 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-14 23:58:40,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:40,083 INFO L225 Difference]: With dead ends: 97 [2020-10-14 23:58:40,083 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 23:58:40,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:58:40,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 23:58:40,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2020-10-14 23:58:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 23:58:40,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 72 transitions. [2020-10-14 23:58:40,092 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 72 transitions. Word has length 20 [2020-10-14 23:58:40,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:40,092 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 72 transitions. [2020-10-14 23:58:40,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:58:40,093 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 72 transitions. [2020-10-14 23:58:40,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:58:40,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:40,094 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:40,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:58:40,094 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:40,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:40,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1142891807, now seen corresponding path program 2 times [2020-10-14 23:58:40,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:40,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132172043] [2020-10-14 23:58:40,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:40,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:40,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:40,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:58:40,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:40,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-14 23:58:40,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:40,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:40,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:58:40,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 23:58:40,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:58:40,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:40,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:40,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:40,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:40,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:40,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:40,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:40,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:40,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:40,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:40,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:40,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:40,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 23:58:40,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132172043] [2020-10-14 23:58:40,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:40,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 23:58:40,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899603214] [2020-10-14 23:58:40,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:58:40,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:40,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:58:40,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:58:40,206 INFO L87 Difference]: Start difference. First operand 52 states and 72 transitions. Second operand 4 states. [2020-10-14 23:58:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:40,237 INFO L93 Difference]: Finished difference Result 64 states and 88 transitions. [2020-10-14 23:58:40,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:58:40,238 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-14 23:58:40,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:40,239 INFO L225 Difference]: With dead ends: 64 [2020-10-14 23:58:40,240 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 23:58:40,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:58:40,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 23:58:40,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-14 23:58:40,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 23:58:40,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2020-10-14 23:58:40,248 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 21 [2020-10-14 23:58:40,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:40,248 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2020-10-14 23:58:40,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:58:40,248 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2020-10-14 23:58:40,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:58:40,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:40,249 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:40,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:58:40,250 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:40,251 INFO L82 PathProgramCache]: Analyzing trace with hash 604884398, now seen corresponding path program 3 times [2020-10-14 23:58:40,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:40,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198191987] [2020-10-14 23:58:40,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:40,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:40,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:40,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:40,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:40,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:40,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:58:40,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:40,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-14 23:58:40,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:40,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:40,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:58:40,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:40,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:58:40,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:40,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:40,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:40,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:40,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:40,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:40,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:40,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:40,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:40,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:40,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:40,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:40,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:58:40,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198191987] [2020-10-14 23:58:40,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:40,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:58:40,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061571576] [2020-10-14 23:58:40,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:58:40,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:40,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:58:40,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:58:40,816 INFO L87 Difference]: Start difference. First operand 53 states and 73 transitions. Second operand 6 states. [2020-10-14 23:58:40,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:40,918 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2020-10-14 23:58:40,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:58:40,919 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-14 23:58:40,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:40,920 INFO L225 Difference]: With dead ends: 65 [2020-10-14 23:58:40,920 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 23:58:40,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:58:40,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 23:58:40,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-14 23:58:40,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 23:58:40,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2020-10-14 23:58:40,927 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 69 transitions. Word has length 21 [2020-10-14 23:58:40,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:40,928 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 69 transitions. [2020-10-14 23:58:40,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:58:40,928 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 69 transitions. [2020-10-14 23:58:40,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:58:40,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:40,929 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:40,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:58:40,929 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:40,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:40,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1791890094, now seen corresponding path program 2 times [2020-10-14 23:58:40,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:40,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739905339] [2020-10-14 23:58:40,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:40,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:40,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:40,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:41,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:41,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:41,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:41,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:58:41,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:41,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-14 23:58:41,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:41,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:41,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:58:41,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 23:58:41,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:58:41,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:41,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:41,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:41,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:41,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:41,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:41,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:41,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:41,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:41,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:41,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:41,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:41,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:58:41,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739905339] [2020-10-14 23:58:41,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:41,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:58:41,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307070959] [2020-10-14 23:58:41,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:58:41,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:41,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:58:41,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:58:41,442 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand 5 states. [2020-10-14 23:58:41,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:41,540 INFO L93 Difference]: Finished difference Result 60 states and 82 transitions. [2020-10-14 23:58:41,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:58:41,542 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-14 23:58:41,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:41,543 INFO L225 Difference]: With dead ends: 60 [2020-10-14 23:58:41,543 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 23:58:41,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:58:41,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 23:58:41,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-14 23:58:41,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 23:58:41,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 72 transitions. [2020-10-14 23:58:41,559 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 72 transitions. Word has length 22 [2020-10-14 23:58:41,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:41,559 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 72 transitions. [2020-10-14 23:58:41,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:58:41,560 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 72 transitions. [2020-10-14 23:58:41,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:58:41,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:41,561 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:41,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:58:41,561 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:41,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:41,562 INFO L82 PathProgramCache]: Analyzing trace with hash 389061695, now seen corresponding path program 3 times [2020-10-14 23:58:41,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:41,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103339849] [2020-10-14 23:58:41,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:41,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:41,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:41,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:41,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:42,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:42,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:58:42,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:42,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-14 23:58:42,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:42,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:42,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:58:42,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:58:42,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:58:42,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:42,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:42,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:42,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:42,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:42,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:42,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:42,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:42,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:42,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:42,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:42,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:42,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 23:58:42,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103339849] [2020-10-14 23:58:42,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:42,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:58:42,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454402565] [2020-10-14 23:58:42,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:58:42,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:42,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:58:42,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:58:42,156 INFO L87 Difference]: Start difference. First operand 52 states and 72 transitions. Second operand 5 states. [2020-10-14 23:58:42,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:42,207 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2020-10-14 23:58:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:58:42,208 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-14 23:58:42,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:42,209 INFO L225 Difference]: With dead ends: 59 [2020-10-14 23:58:42,209 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 23:58:42,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:58:42,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 23:58:42,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-14 23:58:42,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 23:58:42,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-10-14 23:58:42,215 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 22 [2020-10-14 23:58:42,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:42,216 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-10-14 23:58:42,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:58:42,216 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-10-14 23:58:42,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:58:42,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:42,217 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:42,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:58:42,217 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:42,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:42,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1814111987, now seen corresponding path program 3 times [2020-10-14 23:58:42,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:42,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234090513] [2020-10-14 23:58:42,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:42,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:42,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:42,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:42,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:43,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:43,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:58:43,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:43,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 791 [2020-10-14 23:58:43,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:43,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:43,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:58:43,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:43,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:58:43,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:43,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:43,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:43,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:43,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:43,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:43,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:43,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:43,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:43,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:43,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:43,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:43,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 23:58:43,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234090513] [2020-10-14 23:58:43,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:43,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:58:43,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638596672] [2020-10-14 23:58:43,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:58:43,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:43,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:58:43,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:58:43,124 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 6 states. [2020-10-14 23:58:43,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:43,245 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2020-10-14 23:58:43,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:58:43,246 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-14 23:58:43,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:43,247 INFO L225 Difference]: With dead ends: 83 [2020-10-14 23:58:43,247 INFO L226 Difference]: Without dead ends: 75 [2020-10-14 23:58:43,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:58:43,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-14 23:58:43,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2020-10-14 23:58:43,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 23:58:43,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2020-10-14 23:58:43,257 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 22 [2020-10-14 23:58:43,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:43,258 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2020-10-14 23:58:43,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:58:43,258 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2020-10-14 23:58:43,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:58:43,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:43,259 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 23:58:43,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:58:43,259 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:43,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:43,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1152384254, now seen corresponding path program 3 times [2020-10-14 23:58:43,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:43,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090216398] [2020-10-14 23:58:43,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:43,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:43,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:43,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:43,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:58:43,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:58:43,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-14 23:58:43,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:43,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:43,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:58:43,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 23:58:43,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:58:43,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:43,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:43,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:43,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:43,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:43,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:43,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:43,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:43,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:43,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:43,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:43,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:43,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 23:58:43,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090216398] [2020-10-14 23:58:43,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:43,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:58:43,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137888891] [2020-10-14 23:58:43,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:58:43,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:43,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:58:43,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:58:43,573 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand 5 states. [2020-10-14 23:58:43,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:43,621 INFO L93 Difference]: Finished difference Result 79 states and 112 transitions. [2020-10-14 23:58:43,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:58:43,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-14 23:58:43,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:43,623 INFO L225 Difference]: With dead ends: 79 [2020-10-14 23:58:43,624 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 23:58:43,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:58:43,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 23:58:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-10-14 23:58:43,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-14 23:58:43,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 84 transitions. [2020-10-14 23:58:43,637 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 84 transitions. Word has length 23 [2020-10-14 23:58:43,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:43,637 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 84 transitions. [2020-10-14 23:58:43,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:58:43,638 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 84 transitions. [2020-10-14 23:58:43,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 23:58:43,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:43,638 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:43,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:58:43,639 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:43,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:43,639 INFO L82 PathProgramCache]: Analyzing trace with hash -868998465, now seen corresponding path program 4 times [2020-10-14 23:58:43,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:43,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003660409] [2020-10-14 23:58:43,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:43,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:43,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:43,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:43,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:44,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:44,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 23:58:44,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:44,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1096 [2020-10-14 23:58:44,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:44,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:44,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:58:44,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:44,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:58:44,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:44,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:44,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:44,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:44,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:44,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:44,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:44,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:44,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:44,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:44,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:44,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:44,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 23:58:44,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003660409] [2020-10-14 23:58:44,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:44,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:58:44,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549295045] [2020-10-14 23:58:44,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:58:44,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:44,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:58:44,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:58:44,849 INFO L87 Difference]: Start difference. First operand 60 states and 84 transitions. Second operand 7 states. [2020-10-14 23:58:44,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:44,970 INFO L93 Difference]: Finished difference Result 132 states and 192 transitions. [2020-10-14 23:58:44,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:58:44,972 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-14 23:58:44,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:44,973 INFO L225 Difference]: With dead ends: 132 [2020-10-14 23:58:44,973 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 23:58:44,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:58:44,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 23:58:44,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 70. [2020-10-14 23:58:44,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 23:58:44,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 96 transitions. [2020-10-14 23:58:44,985 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 96 transitions. Word has length 23 [2020-10-14 23:58:44,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:44,985 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 96 transitions. [2020-10-14 23:58:44,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:58:44,985 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 96 transitions. [2020-10-14 23:58:44,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:58:44,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:44,988 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:44,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:58:44,988 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:44,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:44,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1399711295, now seen corresponding path program 4 times [2020-10-14 23:58:44,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:44,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689817787] [2020-10-14 23:58:44,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:45,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:45,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:45,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:45,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:58:45,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:58:45,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-14 23:58:45,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:45,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:45,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:58:45,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 23:58:45,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:58:45,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:45,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:45,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:45,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:45,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:45,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:45,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:45,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:45,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:45,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:45,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:45,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:45,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 23:58:45,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689817787] [2020-10-14 23:58:45,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:45,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:58:45,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743965121] [2020-10-14 23:58:45,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:58:45,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:45,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:58:45,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:58:45,218 INFO L87 Difference]: Start difference. First operand 70 states and 96 transitions. Second operand 6 states. [2020-10-14 23:58:45,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:45,288 INFO L93 Difference]: Finished difference Result 91 states and 128 transitions. [2020-10-14 23:58:45,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:58:45,289 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-14 23:58:45,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:45,290 INFO L225 Difference]: With dead ends: 91 [2020-10-14 23:58:45,290 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 23:58:45,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:58:45,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 23:58:45,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2020-10-14 23:58:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 23:58:45,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2020-10-14 23:58:45,298 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 24 [2020-10-14 23:58:45,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:45,298 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2020-10-14 23:58:45,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:58:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2020-10-14 23:58:45,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:58:45,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:45,299 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:45,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:58:45,300 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:45,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:45,300 INFO L82 PathProgramCache]: Analyzing trace with hash 937112910, now seen corresponding path program 5 times [2020-10-14 23:58:45,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:45,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126414237] [2020-10-14 23:58:45,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:45,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:45,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:45,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:45,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:45,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:46,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:46,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:46,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:58:46,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:58:46,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1664 [2020-10-14 23:58:46,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:46,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:46,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:58:46,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:46,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:58:46,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:47,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:47,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:47,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:47,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:47,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:47,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:47,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:47,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:47,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:47,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:47,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:47,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 23:58:47,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126414237] [2020-10-14 23:58:47,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:47,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:58:47,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186086680] [2020-10-14 23:58:47,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:58:47,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:47,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:58:47,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:58:47,102 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand 8 states. [2020-10-14 23:58:47,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:47,264 INFO L93 Difference]: Finished difference Result 173 states and 251 transitions. [2020-10-14 23:58:47,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:58:47,265 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-14 23:58:47,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:47,267 INFO L225 Difference]: With dead ends: 173 [2020-10-14 23:58:47,267 INFO L226 Difference]: Without dead ends: 136 [2020-10-14 23:58:47,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:58:47,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-14 23:58:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 87. [2020-10-14 23:58:47,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 23:58:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 119 transitions. [2020-10-14 23:58:47,279 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 119 transitions. Word has length 24 [2020-10-14 23:58:47,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:47,279 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 119 transitions. [2020-10-14 23:58:47,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:58:47,279 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 119 transitions. [2020-10-14 23:58:47,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 23:58:47,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:47,284 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:47,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:58:47,284 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:47,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:47,285 INFO L82 PathProgramCache]: Analyzing trace with hash 417112735, now seen corresponding path program 6 times [2020-10-14 23:58:47,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:47,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516276132] [2020-10-14 23:58:47,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:47,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:47,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:47,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:47,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:48,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:48,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 23:58:48,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:48,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1233 [2020-10-14 23:58:48,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:48,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:48,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:58:48,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:58:48,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:58:48,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:48,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:48,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:48,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:48,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:48,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:48,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:48,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:48,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:48,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:48,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:48,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:48,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 23:58:48,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516276132] [2020-10-14 23:58:48,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:48,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:58:48,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897275060] [2020-10-14 23:58:48,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:58:48,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:48,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:58:48,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:58:48,618 INFO L87 Difference]: Start difference. First operand 87 states and 119 transitions. Second operand 7 states. [2020-10-14 23:58:50,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:50,952 INFO L93 Difference]: Finished difference Result 132 states and 185 transitions. [2020-10-14 23:58:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:58:50,952 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-14 23:58:50,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:50,954 INFO L225 Difference]: With dead ends: 132 [2020-10-14 23:58:50,954 INFO L226 Difference]: Without dead ends: 120 [2020-10-14 23:58:50,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:58:50,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-14 23:58:50,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2020-10-14 23:58:50,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-14 23:58:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 153 transitions. [2020-10-14 23:58:50,969 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 153 transitions. Word has length 25 [2020-10-14 23:58:50,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:50,969 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 153 transitions. [2020-10-14 23:58:50,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:58:50,970 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 153 transitions. [2020-10-14 23:58:50,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:58:50,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:50,972 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:50,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:58:50,972 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:50,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:50,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1433360590, now seen corresponding path program 5 times [2020-10-14 23:58:50,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:50,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130576224] [2020-10-14 23:58:50,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:51,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:51,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:51,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:58:51,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:51,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-14 23:58:51,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:51,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:51,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:58:51,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:58:51,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:58:51,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:51,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:51,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:51,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:51,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:51,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:51,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:51,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:51,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:51,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:51,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:51,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:51,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 23:58:51,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130576224] [2020-10-14 23:58:51,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:51,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:58:51,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524632605] [2020-10-14 23:58:51,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:58:51,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:51,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:58:51,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:58:51,152 INFO L87 Difference]: Start difference. First operand 112 states and 153 transitions. Second operand 5 states. [2020-10-14 23:58:51,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:51,203 INFO L93 Difference]: Finished difference Result 124 states and 165 transitions. [2020-10-14 23:58:51,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:58:51,204 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-14 23:58:51,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:51,205 INFO L225 Difference]: With dead ends: 124 [2020-10-14 23:58:51,205 INFO L226 Difference]: Without dead ends: 105 [2020-10-14 23:58:51,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:58:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-14 23:58:51,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-14 23:58:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-14 23:58:51,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 143 transitions. [2020-10-14 23:58:51,216 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 143 transitions. Word has length 26 [2020-10-14 23:58:51,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:51,216 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 143 transitions. [2020-10-14 23:58:51,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:58:51,217 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 143 transitions. [2020-10-14 23:58:51,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:58:51,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:51,218 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:51,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:58:51,218 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:51,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:51,218 INFO L82 PathProgramCache]: Analyzing trace with hash -2147382771, now seen corresponding path program 7 times [2020-10-14 23:58:51,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:51,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829225832] [2020-10-14 23:58:51,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:51,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:51,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:51,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:51,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:51,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:53,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:55,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:55,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:58:55,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:58:55,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4510 [2020-10-14 23:58:55,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:55,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:55,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:58:55,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:58:55,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:58:55,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:58:56,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:56,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:56,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:56,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:56,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:56,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:56,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:56,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:56,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:56,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:56,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:56,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:58:56,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829225832] [2020-10-14 23:58:56,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:56,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:58:56,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423522627] [2020-10-14 23:58:56,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:58:56,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:56,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:58:56,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:58:56,121 INFO L87 Difference]: Start difference. First operand 105 states and 143 transitions. Second operand 14 states. [2020-10-14 23:58:56,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:56,969 INFO L93 Difference]: Finished difference Result 191 states and 272 transitions. [2020-10-14 23:58:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:58:56,969 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-10-14 23:58:56,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:56,970 INFO L225 Difference]: With dead ends: 191 [2020-10-14 23:58:56,970 INFO L226 Difference]: Without dead ends: 133 [2020-10-14 23:58:56,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:58:56,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-14 23:58:56,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 93. [2020-10-14 23:58:56,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 23:58:56,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 130 transitions. [2020-10-14 23:58:56,979 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 130 transitions. Word has length 26 [2020-10-14 23:58:56,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:56,979 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 130 transitions. [2020-10-14 23:58:56,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:58:56,979 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 130 transitions. [2020-10-14 23:58:56,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:58:56,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:56,980 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:56,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:58:56,981 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:56,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:56,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1708010337, now seen corresponding path program 6 times [2020-10-14 23:58:56,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:56,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446794381] [2020-10-14 23:58:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:57,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:57,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:57,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:57,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:58,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:58,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:58:58,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:58,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1048 [2020-10-14 23:58:58,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:58,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:58,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:58:58,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:58:58,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:58:58,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:58,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:58,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:58,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:58,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:58,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:58,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:58,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:58,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:58,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:58,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:58,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:58,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 23:58:58,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446794381] [2020-10-14 23:58:58,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:58,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:58:58,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700856014] [2020-10-14 23:58:58,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:58:58,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:58,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:58:58,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:58:58,158 INFO L87 Difference]: Start difference. First operand 93 states and 130 transitions. Second operand 6 states. [2020-10-14 23:58:58,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:58,510 INFO L93 Difference]: Finished difference Result 103 states and 142 transitions. [2020-10-14 23:58:58,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:58:58,512 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-14 23:58:58,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:58,513 INFO L225 Difference]: With dead ends: 103 [2020-10-14 23:58:58,513 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 23:58:58,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:58:58,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 23:58:58,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-14 23:58:58,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-14 23:58:58,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 131 transitions. [2020-10-14 23:58:58,525 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 131 transitions. Word has length 27 [2020-10-14 23:58:58,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:58,525 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 131 transitions. [2020-10-14 23:58:58,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:58:58,525 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 131 transitions. [2020-10-14 23:58:58,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:58:58,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:58,526 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:58,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:58:58,526 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:58,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:58,527 INFO L82 PathProgramCache]: Analyzing trace with hash 541514335, now seen corresponding path program 8 times [2020-10-14 23:58:58,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:58,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100895465] [2020-10-14 23:58:58,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:58,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:58,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:58,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:59,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:00,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:00,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:59:00,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:59:00,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1582 [2020-10-14 23:59:00,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:00,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:00,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:59:00,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:00,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:59:00,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:00,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:00,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:00,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:00,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:00,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:00,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:00,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:00,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:00,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:00,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:00,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:00,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:00,222 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 23:59:00,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100895465] [2020-10-14 23:59:00,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:00,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:59:00,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781090008] [2020-10-14 23:59:00,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:59:00,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:00,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:59:00,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:59:00,227 INFO L87 Difference]: Start difference. First operand 94 states and 131 transitions. Second operand 9 states. [2020-10-14 23:59:00,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:00,416 INFO L93 Difference]: Finished difference Result 208 states and 300 transitions. [2020-10-14 23:59:00,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:59:00,417 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-14 23:59:00,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:00,418 INFO L225 Difference]: With dead ends: 208 [2020-10-14 23:59:00,419 INFO L226 Difference]: Without dead ends: 156 [2020-10-14 23:59:00,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:59:00,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-14 23:59:00,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 103. [2020-10-14 23:59:00,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 23:59:00,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 142 transitions. [2020-10-14 23:59:00,433 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 142 transitions. Word has length 27 [2020-10-14 23:59:00,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:00,433 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 142 transitions. [2020-10-14 23:59:00,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:59:00,433 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 142 transitions. [2020-10-14 23:59:00,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:59:00,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:00,434 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:00,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:59:00,434 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:00,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:00,435 INFO L82 PathProgramCache]: Analyzing trace with hash -835167697, now seen corresponding path program 7 times [2020-10-14 23:59:00,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:00,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866149684] [2020-10-14 23:59:00,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:00,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:00,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:00,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:00,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:00,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:59:00,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:00,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-14 23:59:00,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:00,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:00,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:59:00,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 23:59:00,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:59:00,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:00,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:00,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:00,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:00,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:00,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:00,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:00,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:00,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:00,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:00,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:00,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:00,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-14 23:59:00,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866149684] [2020-10-14 23:59:00,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:00,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:59:00,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676763854] [2020-10-14 23:59:00,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:59:00,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:00,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:59:00,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:59:00,798 INFO L87 Difference]: Start difference. First operand 103 states and 142 transitions. Second operand 7 states. [2020-10-14 23:59:00,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:00,909 INFO L93 Difference]: Finished difference Result 141 states and 201 transitions. [2020-10-14 23:59:00,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:59:00,910 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-14 23:59:00,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:00,911 INFO L225 Difference]: With dead ends: 141 [2020-10-14 23:59:00,911 INFO L226 Difference]: Without dead ends: 130 [2020-10-14 23:59:00,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:59:00,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-14 23:59:00,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 115. [2020-10-14 23:59:00,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-14 23:59:00,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 159 transitions. [2020-10-14 23:59:00,925 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 159 transitions. Word has length 28 [2020-10-14 23:59:00,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:00,926 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 159 transitions. [2020-10-14 23:59:00,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:59:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 159 transitions. [2020-10-14 23:59:00,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:59:00,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:00,928 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:00,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:59:00,928 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:00,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:00,928 INFO L82 PathProgramCache]: Analyzing trace with hash -903472065, now seen corresponding path program 9 times [2020-10-14 23:59:00,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:00,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150650712] [2020-10-14 23:59:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:00,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:00,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:01,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:01,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:02,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:02,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:59:02,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:59:02,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1586 [2020-10-14 23:59:02,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:02,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:02,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:59:02,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:59:02,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:59:02,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:02,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:02,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:02,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:02,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:02,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:02,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:02,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:02,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:02,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:02,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:02,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:02,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:02,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-14 23:59:02,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150650712] [2020-10-14 23:59:02,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:02,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:59:02,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796375204] [2020-10-14 23:59:02,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:59:02,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:02,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:59:02,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:59:02,614 INFO L87 Difference]: Start difference. First operand 115 states and 159 transitions. Second operand 7 states. [2020-10-14 23:59:03,958 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 30 [2020-10-14 23:59:04,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:04,143 INFO L93 Difference]: Finished difference Result 130 states and 181 transitions. [2020-10-14 23:59:04,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:59:04,144 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-14 23:59:04,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:04,145 INFO L225 Difference]: With dead ends: 130 [2020-10-14 23:59:04,145 INFO L226 Difference]: Without dead ends: 123 [2020-10-14 23:59:04,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:59:04,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-14 23:59:04,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 116. [2020-10-14 23:59:04,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-14 23:59:04,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 160 transitions. [2020-10-14 23:59:04,162 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 160 transitions. Word has length 28 [2020-10-14 23:59:04,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:04,162 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 160 transitions. [2020-10-14 23:59:04,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:59:04,162 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 160 transitions. [2020-10-14 23:59:04,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:59:04,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:04,163 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:04,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:59:04,163 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:04,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:04,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1710493038, now seen corresponding path program 10 times [2020-10-14 23:59:04,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:04,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274682038] [2020-10-14 23:59:04,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:04,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:04,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:04,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:04,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:04,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:04,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:06,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:06,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:59:06,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:59:06,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2584 [2020-10-14 23:59:06,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:06,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:06,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:59:06,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:06,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:59:06,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:06,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:06,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:06,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:06,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:06,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:06,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:06,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:06,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:06,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:06,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:06,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:06,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 23:59:06,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274682038] [2020-10-14 23:59:06,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:06,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:59:06,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815209528] [2020-10-14 23:59:06,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:59:06,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:06,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:59:06,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:59:06,883 INFO L87 Difference]: Start difference. First operand 116 states and 160 transitions. Second operand 10 states. [2020-10-14 23:59:07,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:07,139 INFO L93 Difference]: Finished difference Result 266 states and 379 transitions. [2020-10-14 23:59:07,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:59:07,139 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-14 23:59:07,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:07,146 INFO L225 Difference]: With dead ends: 266 [2020-10-14 23:59:07,147 INFO L226 Difference]: Without dead ends: 207 [2020-10-14 23:59:07,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:59:07,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-14 23:59:07,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 125. [2020-10-14 23:59:07,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-14 23:59:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 171 transitions. [2020-10-14 23:59:07,172 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 171 transitions. Word has length 28 [2020-10-14 23:59:07,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:07,172 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 171 transitions. [2020-10-14 23:59:07,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:59:07,173 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 171 transitions. [2020-10-14 23:59:07,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 23:59:07,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:07,173 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:07,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:59:07,175 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:07,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:07,176 INFO L82 PathProgramCache]: Analyzing trace with hash -705872833, now seen corresponding path program 11 times [2020-10-14 23:59:07,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:07,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764912258] [2020-10-14 23:59:07,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:07,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:07,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:08,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:08,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 23:59:08,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:59:08,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1802 [2020-10-14 23:59:08,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:08,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:08,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:59:08,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:08,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:59:08,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:09,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:09,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:09,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:09,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:09,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:09,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:09,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:09,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:09,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:09,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:09,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:09,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 23:59:09,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764912258] [2020-10-14 23:59:09,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:09,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:59:09,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710907757] [2020-10-14 23:59:09,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:59:09,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:09,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:59:09,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:59:09,137 INFO L87 Difference]: Start difference. First operand 125 states and 171 transitions. Second operand 11 states. [2020-10-14 23:59:09,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:09,455 INFO L93 Difference]: Finished difference Result 286 states and 406 transitions. [2020-10-14 23:59:09,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:59:09,456 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-10-14 23:59:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:09,458 INFO L225 Difference]: With dead ends: 286 [2020-10-14 23:59:09,458 INFO L226 Difference]: Without dead ends: 227 [2020-10-14 23:59:09,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:59:09,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-14 23:59:09,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 134. [2020-10-14 23:59:09,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-14 23:59:09,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 182 transitions. [2020-10-14 23:59:09,497 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 182 transitions. Word has length 29 [2020-10-14 23:59:09,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:09,497 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 182 transitions. [2020-10-14 23:59:09,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:59:09,497 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 182 transitions. [2020-10-14 23:59:09,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:59:09,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:09,498 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:09,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 23:59:09,499 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:09,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:09,499 INFO L82 PathProgramCache]: Analyzing trace with hash 520316479, now seen corresponding path program 8 times [2020-10-14 23:59:09,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:09,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821119805] [2020-10-14 23:59:09,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:09,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:09,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:09,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:09,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:10,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:10,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:59:10,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:59:10,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1471 [2020-10-14 23:59:10,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:10,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:10,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:59:10,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:59:10,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:59:10,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:11,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:11,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:11,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:11,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:11,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:11,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:11,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:11,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:11,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:11,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:11,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:11,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-14 23:59:11,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821119805] [2020-10-14 23:59:11,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:11,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:59:11,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738275512] [2020-10-14 23:59:11,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:59:11,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:11,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:59:11,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:59:11,073 INFO L87 Difference]: Start difference. First operand 134 states and 182 transitions. Second operand 8 states. [2020-10-14 23:59:11,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:11,183 INFO L93 Difference]: Finished difference Result 183 states and 255 transitions. [2020-10-14 23:59:11,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:59:11,187 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-14 23:59:11,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:11,189 INFO L225 Difference]: With dead ends: 183 [2020-10-14 23:59:11,189 INFO L226 Difference]: Without dead ends: 152 [2020-10-14 23:59:11,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:59:11,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-14 23:59:11,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-10-14 23:59:11,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-14 23:59:11,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 207 transitions. [2020-10-14 23:59:11,217 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 207 transitions. Word has length 30 [2020-10-14 23:59:11,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:11,218 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 207 transitions. [2020-10-14 23:59:11,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:59:11,218 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 207 transitions. [2020-10-14 23:59:11,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:59:11,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:11,219 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:11,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 23:59:11,220 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:11,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:11,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1224894893, now seen corresponding path program 4 times [2020-10-14 23:59:11,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:11,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407417669] [2020-10-14 23:59:11,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:11,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:11,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:11,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:11,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:11,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:12,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:14,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:14,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:59:14,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:59:14,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2848 [2020-10-14 23:59:14,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:14,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:14,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:59:14,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:14,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:59:14,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:14,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:14,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:14,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:14,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:14,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:14,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:14,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:14,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:14,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:14,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:14,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:14,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 23:59:14,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407417669] [2020-10-14 23:59:14,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:14,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:59:14,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93260649] [2020-10-14 23:59:14,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:59:14,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:14,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:59:14,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:59:14,239 INFO L87 Difference]: Start difference. First operand 151 states and 207 transitions. Second operand 12 states. [2020-10-14 23:59:14,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:14,656 INFO L93 Difference]: Finished difference Result 288 states and 418 transitions. [2020-10-14 23:59:14,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:59:14,657 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-14 23:59:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:14,658 INFO L225 Difference]: With dead ends: 288 [2020-10-14 23:59:14,658 INFO L226 Difference]: Without dead ends: 226 [2020-10-14 23:59:14,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:59:14,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-14 23:59:14,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 162. [2020-10-14 23:59:14,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-14 23:59:14,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 221 transitions. [2020-10-14 23:59:14,700 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 221 transitions. Word has length 30 [2020-10-14 23:59:14,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:14,701 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 221 transitions. [2020-10-14 23:59:14,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:59:14,701 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 221 transitions. [2020-10-14 23:59:14,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 23:59:14,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:14,702 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:14,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 23:59:14,702 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:14,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:14,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1202718862, now seen corresponding path program 4 times [2020-10-14 23:59:14,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:14,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859244914] [2020-10-14 23:59:14,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:14,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:14,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:14,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:14,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:16,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:16,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 23:59:16,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:59:16,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1648 [2020-10-14 23:59:16,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:16,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:16,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:59:16,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:59:16,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:59:16,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:16,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:16,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:16,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:16,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:16,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:16,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:16,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:16,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:16,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:16,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:16,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:16,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 23:59:16,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859244914] [2020-10-14 23:59:16,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:16,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:59:16,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970514795] [2020-10-14 23:59:16,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:59:16,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:16,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:59:16,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:59:16,482 INFO L87 Difference]: Start difference. First operand 162 states and 221 transitions. Second operand 9 states. [2020-10-14 23:59:16,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:16,664 INFO L93 Difference]: Finished difference Result 246 states and 359 transitions. [2020-10-14 23:59:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:59:16,665 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-14 23:59:16,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:16,667 INFO L225 Difference]: With dead ends: 246 [2020-10-14 23:59:16,667 INFO L226 Difference]: Without dead ends: 221 [2020-10-14 23:59:16,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:59:16,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-14 23:59:16,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2020-10-14 23:59:16,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-14 23:59:16,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 291 transitions. [2020-10-14 23:59:16,682 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 291 transitions. Word has length 31 [2020-10-14 23:59:16,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:16,682 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 291 transitions. [2020-10-14 23:59:16,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:59:16,683 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 291 transitions. [2020-10-14 23:59:16,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:59:16,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:16,684 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:16,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 23:59:16,684 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:16,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:16,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1313460161, now seen corresponding path program 9 times [2020-10-14 23:59:16,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:16,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164384583] [2020-10-14 23:59:16,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:16,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:16,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:17,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:17,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:59:17,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:17,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-14 23:59:17,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:17,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:17,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:59:17,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 23:59:17,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:59:17,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:17,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:17,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:17,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:17,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:17,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:17,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:17,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:17,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:17,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:17,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:17,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:17,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 23:59:17,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164384583] [2020-10-14 23:59:17,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:17,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:59:17,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47291010] [2020-10-14 23:59:17,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:59:17,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:17,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:59:17,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:59:17,113 INFO L87 Difference]: Start difference. First operand 220 states and 291 transitions. Second operand 8 states. [2020-10-14 23:59:17,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:17,231 INFO L93 Difference]: Finished difference Result 317 states and 412 transitions. [2020-10-14 23:59:17,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:59:17,232 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-14 23:59:17,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:17,235 INFO L225 Difference]: With dead ends: 317 [2020-10-14 23:59:17,235 INFO L226 Difference]: Without dead ends: 290 [2020-10-14 23:59:17,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:59:17,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-14 23:59:17,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 239. [2020-10-14 23:59:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-14 23:59:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 315 transitions. [2020-10-14 23:59:17,252 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 315 transitions. Word has length 32 [2020-10-14 23:59:17,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:17,253 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 315 transitions. [2020-10-14 23:59:17,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:59:17,253 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 315 transitions. [2020-10-14 23:59:17,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:59:17,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:17,254 INFO L422 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:17,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 23:59:17,255 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:17,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:17,255 INFO L82 PathProgramCache]: Analyzing trace with hash -420974770, now seen corresponding path program 5 times [2020-10-14 23:59:17,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:17,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605893275] [2020-10-14 23:59:17,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:17,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:17,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:17,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:17,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:17,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:18,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:20,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:20,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:59:20,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 23:59:20,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3084 [2020-10-14 23:59:20,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:20,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:20,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:59:20,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:59:20,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:59:20,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:20,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:20,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:20,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:20,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:20,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:20,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:59:20,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:20,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:20,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:20,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:20,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:20,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-14 23:59:20,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605893275] [2020-10-14 23:59:20,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:20,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:59:20,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676547213] [2020-10-14 23:59:20,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:59:20,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:20,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:59:20,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:59:20,525 INFO L87 Difference]: Start difference. First operand 239 states and 315 transitions. Second operand 13 states. [2020-10-14 23:59:20,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:20,991 INFO L93 Difference]: Finished difference Result 455 states and 636 transitions. [2020-10-14 23:59:20,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:59:20,991 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-14 23:59:20,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:20,993 INFO L225 Difference]: With dead ends: 455 [2020-10-14 23:59:20,993 INFO L226 Difference]: Without dead ends: 352 [2020-10-14 23:59:20,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:59:20,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-14 23:59:21,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 252. [2020-10-14 23:59:21,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-14 23:59:21,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 332 transitions. [2020-10-14 23:59:21,013 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 332 transitions. Word has length 32 [2020-10-14 23:59:21,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:21,013 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 332 transitions. [2020-10-14 23:59:21,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:59:21,014 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 332 transitions. [2020-10-14 23:59:21,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:59:21,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:21,015 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:21,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 23:59:21,015 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:21,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:21,015 INFO L82 PathProgramCache]: Analyzing trace with hash 827303903, now seen corresponding path program 12 times [2020-10-14 23:59:21,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:21,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862981268] [2020-10-14 23:59:21,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:21,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:21,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:21,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:21,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:21,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:26,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:26,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:59:26,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:59:26,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 23:59:26,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:26,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:26,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:59:26,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:59:26,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:59:26,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:26,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:26,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:26,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:26,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:26,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:26,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:26,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:26,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:26,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:26,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:26,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:26,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-14 23:59:26,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862981268] [2020-10-14 23:59:26,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:26,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:59:26,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055846225] [2020-10-14 23:59:26,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:59:26,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:26,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:59:26,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:59:26,167 INFO L87 Difference]: Start difference. First operand 252 states and 332 transitions. Second operand 10 states. [2020-10-14 23:59:26,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:26,391 INFO L93 Difference]: Finished difference Result 360 states and 509 transitions. [2020-10-14 23:59:26,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:59:26,392 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-14 23:59:26,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:26,395 INFO L225 Difference]: With dead ends: 360 [2020-10-14 23:59:26,395 INFO L226 Difference]: Without dead ends: 333 [2020-10-14 23:59:26,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:59:26,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-10-14 23:59:26,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 290. [2020-10-14 23:59:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-10-14 23:59:26,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 384 transitions. [2020-10-14 23:59:26,415 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 384 transitions. Word has length 33 [2020-10-14 23:59:26,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:26,416 INFO L479 AbstractCegarLoop]: Abstraction has 290 states and 384 transitions. [2020-10-14 23:59:26,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:59:26,416 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 384 transitions. [2020-10-14 23:59:26,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:59:26,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:26,417 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:26,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 23:59:26,418 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:26,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:26,418 INFO L82 PathProgramCache]: Analyzing trace with hash 945954061, now seen corresponding path program 13 times [2020-10-14 23:59:26,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:26,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765476352] [2020-10-14 23:59:26,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:26,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:26,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:26,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:26,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:27,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:31,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:31,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:59:31,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:59:31,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 23:59:31,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:31,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:31,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:59:31,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:59:31,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:59:31,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:31,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:31,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:31,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:31,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:31,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:31,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:31,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:31,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:31,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:31,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:31,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:31,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-14 23:59:31,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765476352] [2020-10-14 23:59:31,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:31,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:59:31,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218475245] [2020-10-14 23:59:31,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:59:31,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:31,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:59:31,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:59:31,599 INFO L87 Difference]: Start difference. First operand 290 states and 384 transitions. Second operand 11 states. [2020-10-14 23:59:31,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:31,935 INFO L93 Difference]: Finished difference Result 405 states and 575 transitions. [2020-10-14 23:59:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:59:31,935 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-14 23:59:31,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:31,938 INFO L225 Difference]: With dead ends: 405 [2020-10-14 23:59:31,938 INFO L226 Difference]: Without dead ends: 378 [2020-10-14 23:59:31,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:59:31,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-10-14 23:59:31,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 328. [2020-10-14 23:59:31,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-10-14 23:59:31,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 436 transitions. [2020-10-14 23:59:31,959 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 436 transitions. Word has length 34 [2020-10-14 23:59:31,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:31,959 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 436 transitions. [2020-10-14 23:59:31,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:59:31,960 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 436 transitions. [2020-10-14 23:59:31,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 23:59:31,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:31,961 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:31,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 23:59:31,961 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:31,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:31,962 INFO L82 PathProgramCache]: Analyzing trace with hash 329141663, now seen corresponding path program 14 times [2020-10-14 23:59:31,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:31,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964616758] [2020-10-14 23:59:31,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:31,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:32,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:32,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:32,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:32,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:36,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:36,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 23:59:36,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 23:59:36,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 23:59:36,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:36,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:36,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:59:36,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 23:59:36,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:59:36,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:37,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:37,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:37,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:37,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:37,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:37,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:37,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:37,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:37,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:37,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:37,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:37,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-14 23:59:37,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964616758] [2020-10-14 23:59:37,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:37,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:59:37,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176789392] [2020-10-14 23:59:37,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:59:37,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:37,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:59:37,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:59:37,166 INFO L87 Difference]: Start difference. First operand 328 states and 436 transitions. Second operand 12 states. [2020-10-14 23:59:37,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:37,432 INFO L93 Difference]: Finished difference Result 450 states and 641 transitions. [2020-10-14 23:59:37,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:59:37,437 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-14 23:59:37,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:37,439 INFO L225 Difference]: With dead ends: 450 [2020-10-14 23:59:37,439 INFO L226 Difference]: Without dead ends: 423 [2020-10-14 23:59:37,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:59:37,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-14 23:59:37,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 366. [2020-10-14 23:59:37,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2020-10-14 23:59:37,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 488 transitions. [2020-10-14 23:59:37,464 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 488 transitions. Word has length 35 [2020-10-14 23:59:37,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:37,465 INFO L479 AbstractCegarLoop]: Abstraction has 366 states and 488 transitions. [2020-10-14 23:59:37,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:59:37,465 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 488 transitions. [2020-10-14 23:59:37,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:59:37,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:37,466 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:37,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 23:59:37,467 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:37,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:37,467 INFO L82 PathProgramCache]: Analyzing trace with hash -166614865, now seen corresponding path program 10 times [2020-10-14 23:59:37,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:37,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034121784] [2020-10-14 23:59:37,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:37,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:37,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:37,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:37,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:59:37,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:37,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-10-14 23:59:37,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:37,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:37,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:59:37,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 23:59:37,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:59:37,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:39,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:39,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:39,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:39,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:39,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:39,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:39,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:39,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:39,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:39,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:39,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:39,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-14 23:59:39,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034121784] [2020-10-14 23:59:39,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:39,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:59:39,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109670431] [2020-10-14 23:59:39,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:59:39,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:39,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:59:39,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:59:39,923 INFO L87 Difference]: Start difference. First operand 366 states and 488 transitions. Second operand 12 states. [2020-10-14 23:59:51,995 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-10-15 00:00:10,225 WARN L193 SmtUtils]: Spent 8.38 s on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2020-10-15 00:00:30,603 WARN L193 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-10-15 00:00:42,955 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~z~0 (- 1)))) (and (<= 0 (+ c_main_~z~0 (* 4294967296 (div (+ .cse0 4294967294) 4294967296)))) (<= (+ (* 4294967296 (div (+ c_main_~z~0 (- 2)) 4294967296)) 1) (+ (* 4294967296 (div (+ .cse0 4294967295) 4294967296)) c_main_~z~0 (* 4294967296 (div (+ c_main_~z~0 (- 4)) 4294967296)))))) is different from false [2020-10-15 00:01:09,229 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~z~0 (- 1)))) (and (<= (* 4294967296 (div (+ c_main_~z~0 1) 4294967296)) (+ c_main_~z~0 (* 4294967296 (div (+ .cse0 4294967292) 4294967296)) (* 4294967296 (div (+ c_main_~z~0 (- 1)) 4294967296)) 2)) (<= 0 (+ c_main_~z~0 (* 4294967296 (div (+ .cse0 4294967293) 4294967296)) 1)))) is different from false [2020-10-15 00:01:09,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:09,374 INFO L93 Difference]: Finished difference Result 501 states and 635 transitions. [2020-10-15 00:01:09,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 00:01:09,381 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-15 00:01:09,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:09,384 INFO L225 Difference]: With dead ends: 501 [2020-10-15 00:01:09,384 INFO L226 Difference]: Without dead ends: 496 [2020-10-15 00:01:09,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=91, Invalid=252, Unknown=7, NotChecked=70, Total=420 [2020-10-15 00:01:09,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2020-10-15 00:01:09,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 368. [2020-10-15 00:01:09,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-10-15 00:01:09,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 490 transitions. [2020-10-15 00:01:09,412 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 490 transitions. Word has length 36 [2020-10-15 00:01:09,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:09,412 INFO L479 AbstractCegarLoop]: Abstraction has 368 states and 490 transitions. [2020-10-15 00:01:09,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:01:09,412 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 490 transitions. [2020-10-15 00:01:09,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-15 00:01:09,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:09,414 INFO L422 BasicCegarLoop]: trace histogram [11, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:09,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-15 00:01:09,414 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:09,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:09,414 INFO L82 PathProgramCache]: Analyzing trace with hash 836937805, now seen corresponding path program 6 times [2020-10-15 00:01:09,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:09,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547924935] [2020-10-15 00:01:09,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:09,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:09,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:10,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:10,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:12,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:12,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-15 00:01:12,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:01:12,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3060 [2020-10-15 00:01:12,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:12,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:12,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-15 00:01:12,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:12,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-15 00:01:12,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:12,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:12,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:12,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:12,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:12,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:12,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:12,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:12,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:12,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:12,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:12,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:12,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-15 00:01:12,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547924935] [2020-10-15 00:01:12,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:12,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-15 00:01:12,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993253501] [2020-10-15 00:01:12,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 00:01:12,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:12,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 00:01:12,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:01:12,859 INFO L87 Difference]: Start difference. First operand 368 states and 490 transitions. Second operand 20 states. [2020-10-15 00:01:14,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:14,462 INFO L93 Difference]: Finished difference Result 747 states and 1054 transitions. [2020-10-15 00:01:14,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 00:01:14,462 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2020-10-15 00:01:14,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:14,466 INFO L225 Difference]: With dead ends: 747 [2020-10-15 00:01:14,466 INFO L226 Difference]: Without dead ends: 612 [2020-10-15 00:01:14,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 00:01:14,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2020-10-15 00:01:14,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 386. [2020-10-15 00:01:14,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-10-15 00:01:14,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 514 transitions. [2020-10-15 00:01:14,496 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 514 transitions. Word has length 36 [2020-10-15 00:01:14,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:14,496 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 514 transitions. [2020-10-15 00:01:14,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 00:01:14,496 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 514 transitions. [2020-10-15 00:01:14,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-15 00:01:14,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:14,498 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:14,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-15 00:01:14,498 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:14,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:14,498 INFO L82 PathProgramCache]: Analyzing trace with hash -834555730, now seen corresponding path program 11 times [2020-10-15 00:01:14,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:14,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003012222] [2020-10-15 00:01:14,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:14,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:14,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:14,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:14,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-15 00:01:14,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:14,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 459 [2020-10-15 00:01:14,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:14,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:14,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:01:14,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-15 00:01:14,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 00:01:14,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:15,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:15,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:15,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:15,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:15,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:15,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:15,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:15,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:15,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:15,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:15,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:15,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-15 00:01:15,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003012222] [2020-10-15 00:01:15,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:15,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:01:15,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251026407] [2020-10-15 00:01:15,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:01:15,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:15,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:01:15,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:01:15,091 INFO L87 Difference]: Start difference. First operand 386 states and 514 transitions. Second operand 9 states. [2020-10-15 00:01:15,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:15,279 INFO L93 Difference]: Finished difference Result 635 states and 787 transitions. [2020-10-15 00:01:15,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 00:01:15,279 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-15 00:01:15,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:15,283 INFO L225 Difference]: With dead ends: 635 [2020-10-15 00:01:15,284 INFO L226 Difference]: Without dead ends: 629 [2020-10-15 00:01:15,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:01:15,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2020-10-15 00:01:15,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 444. [2020-10-15 00:01:15,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2020-10-15 00:01:15,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 579 transitions. [2020-10-15 00:01:15,325 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 579 transitions. Word has length 37 [2020-10-15 00:01:15,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:15,325 INFO L479 AbstractCegarLoop]: Abstraction has 444 states and 579 transitions. [2020-10-15 00:01:15,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:01:15,326 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 579 transitions. [2020-10-15 00:01:15,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-15 00:01:15,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:15,328 INFO L422 BasicCegarLoop]: trace histogram [12, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:15,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-15 00:01:15,328 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:15,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:15,329 INFO L82 PathProgramCache]: Analyzing trace with hash -257133026, now seen corresponding path program 7 times [2020-10-15 00:01:15,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:15,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881643830] [2020-10-15 00:01:15,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:15,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:15,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:15,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:16,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:17,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:17,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-15 00:01:17,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:01:17,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2014 [2020-10-15 00:01:17,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:17,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:17,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:01:17,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:17,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 00:01:17,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:17,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:17,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:17,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:17,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:17,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:17,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:17,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:17,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:17,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:17,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:17,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:17,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-15 00:01:17,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881643830] [2020-10-15 00:01:17,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:17,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-15 00:01:17,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089801310] [2020-10-15 00:01:17,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 00:01:17,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:17,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 00:01:17,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:01:17,851 INFO L87 Difference]: Start difference. First operand 444 states and 579 transitions. Second operand 21 states. [2020-10-15 00:01:19,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:19,611 INFO L93 Difference]: Finished difference Result 906 states and 1214 transitions. [2020-10-15 00:01:19,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 00:01:19,612 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-10-15 00:01:19,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:19,617 INFO L225 Difference]: With dead ends: 906 [2020-10-15 00:01:19,617 INFO L226 Difference]: Without dead ends: 760 [2020-10-15 00:01:19,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=158, Invalid=1564, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 00:01:19,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2020-10-15 00:01:19,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 462. [2020-10-15 00:01:19,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2020-10-15 00:01:19,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 603 transitions. [2020-10-15 00:01:19,661 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 603 transitions. Word has length 37 [2020-10-15 00:01:19,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:19,662 INFO L479 AbstractCegarLoop]: Abstraction has 462 states and 603 transitions. [2020-10-15 00:01:19,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 00:01:19,662 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 603 transitions. [2020-10-15 00:01:19,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-15 00:01:19,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:19,663 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:19,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-15 00:01:19,666 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:19,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:19,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1344851169, now seen corresponding path program 12 times [2020-10-15 00:01:19,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:19,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907025520] [2020-10-15 00:01:19,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:19,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:19,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:19,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:20,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:24,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:24,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-15 00:01:24,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:01:24,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 00:01:24,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:24,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:24,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:01:24,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-15 00:01:24,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-15 00:01:24,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:24,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:24,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:24,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:24,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:24,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:24,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:24,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:24,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:24,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:24,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:24,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:24,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-15 00:01:24,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907025520] [2020-10-15 00:01:24,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:24,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:01:24,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867113655] [2020-10-15 00:01:24,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:01:24,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:24,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:01:24,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:01:24,857 INFO L87 Difference]: Start difference. First operand 462 states and 603 transitions. Second operand 10 states. [2020-10-15 00:01:27,236 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-10-15 00:01:32,414 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~z~0 (- 1)))) (and (<= 0 (+ c_main_~z~0 (* 4294967296 (div (+ .cse0 4294967293) 4294967296)))) (<= 2 (+ (* 4294967296 (div (+ .cse0 4294967295) 4294967296)) c_main_~z~0)) (<= 1 (+ c_main_~z~0 (* 4294967296 (div (+ .cse0 4294967294) 4294967296)))))) is different from false [2020-10-15 00:01:32,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:32,416 INFO L93 Difference]: Finished difference Result 697 states and 855 transitions. [2020-10-15 00:01:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 00:01:32,416 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-15 00:01:32,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:32,420 INFO L225 Difference]: With dead ends: 697 [2020-10-15 00:01:32,420 INFO L226 Difference]: Without dead ends: 692 [2020-10-15 00:01:32,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=106, Invalid=317, Unknown=1, NotChecked=38, Total=462 [2020-10-15 00:01:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2020-10-15 00:01:32,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 464. [2020-10-15 00:01:32,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-10-15 00:01:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 605 transitions. [2020-10-15 00:01:32,454 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 605 transitions. Word has length 38 [2020-10-15 00:01:32,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:32,454 INFO L479 AbstractCegarLoop]: Abstraction has 464 states and 605 transitions. [2020-10-15 00:01:32,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:01:32,454 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 605 transitions. [2020-10-15 00:01:32,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-15 00:01:32,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:32,456 INFO L422 BasicCegarLoop]: trace histogram [13, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:32,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-15 00:01:32,456 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:32,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:32,457 INFO L82 PathProgramCache]: Analyzing trace with hash 186409581, now seen corresponding path program 8 times [2020-10-15 00:01:32,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:32,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208346970] [2020-10-15 00:01:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:32,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:32,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:32,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:33,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:34,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:34,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-15 00:01:34,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:01:34,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1719 [2020-10-15 00:01:34,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:34,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:34,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-15 00:01:34,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:34,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-15 00:01:34,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:34,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:34,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:34,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:34,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:34,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:34,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:34,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:34,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:34,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:34,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:34,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:34,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-15 00:01:34,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208346970] [2020-10-15 00:01:34,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:34,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-15 00:01:34,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51476261] [2020-10-15 00:01:34,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 00:01:34,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:34,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 00:01:34,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:01:34,594 INFO L87 Difference]: Start difference. First operand 464 states and 605 transitions. Second operand 22 states. [2020-10-15 00:01:36,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:36,578 INFO L93 Difference]: Finished difference Result 968 states and 1291 transitions. [2020-10-15 00:01:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 00:01:36,578 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2020-10-15 00:01:36,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:36,582 INFO L225 Difference]: With dead ends: 968 [2020-10-15 00:01:36,582 INFO L226 Difference]: Without dead ends: 820 [2020-10-15 00:01:36,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=160, Invalid=1646, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 00:01:36,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2020-10-15 00:01:36,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 482. [2020-10-15 00:01:36,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2020-10-15 00:01:36,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 629 transitions. [2020-10-15 00:01:36,620 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 629 transitions. Word has length 38 [2020-10-15 00:01:36,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:36,620 INFO L479 AbstractCegarLoop]: Abstraction has 482 states and 629 transitions. [2020-10-15 00:01:36,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 00:01:36,621 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 629 transitions. [2020-10-15 00:01:36,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-15 00:01:36,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:36,622 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:36,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-15 00:01:36,622 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:36,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:36,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1341985202, now seen corresponding path program 5 times [2020-10-15 00:01:36,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:36,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294493637] [2020-10-15 00:01:36,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:36,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:36,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:36,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:37,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:39,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:41,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:41,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-15 00:01:41,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:01:41,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-15 00:01:41,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:41,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:41,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-15 00:01:41,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:41,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-15 00:01:41,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:41,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:42,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:42,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:42,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:42,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:42,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:42,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:42,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:42,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:42,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:42,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:42,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-15 00:01:42,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294493637] [2020-10-15 00:01:42,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:42,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:01:42,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629999525] [2020-10-15 00:01:42,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:01:42,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:42,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:01:42,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:01:42,012 INFO L87 Difference]: Start difference. First operand 482 states and 629 transitions. Second operand 18 states. [2020-10-15 00:01:43,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:43,156 INFO L93 Difference]: Finished difference Result 722 states and 905 transitions. [2020-10-15 00:01:43,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 00:01:43,156 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2020-10-15 00:01:43,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:43,159 INFO L225 Difference]: With dead ends: 722 [2020-10-15 00:01:43,159 INFO L226 Difference]: Without dead ends: 702 [2020-10-15 00:01:43,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 00:01:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-10-15 00:01:43,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 482. [2020-10-15 00:01:43,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2020-10-15 00:01:43,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 628 transitions. [2020-10-15 00:01:43,197 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 628 transitions. Word has length 39 [2020-10-15 00:01:43,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:43,197 INFO L479 AbstractCegarLoop]: Abstraction has 482 states and 628 transitions. [2020-10-15 00:01:43,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:01:43,197 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 628 transitions. [2020-10-15 00:01:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-15 00:01:43,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:43,204 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:43,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-15 00:01:43,204 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:43,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:43,206 INFO L82 PathProgramCache]: Analyzing trace with hash -805136946, now seen corresponding path program 6 times [2020-10-15 00:01:43,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:43,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69086460] [2020-10-15 00:01:43,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:43,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:43,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:43,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:43,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:44,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:48,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:48,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-15 00:01:48,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:01:48,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 00:01:48,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:48,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:48,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:01:48,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 00:01:48,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 00:01:48,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:48,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:48,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:48,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:48,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:48,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:48,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:01:48,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:48,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:48,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:48,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:48,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:48,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-15 00:01:48,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69086460] [2020-10-15 00:01:48,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:48,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:01:48,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53459485] [2020-10-15 00:01:48,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:01:48,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:48,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:01:48,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:01:48,535 INFO L87 Difference]: Start difference. First operand 482 states and 628 transitions. Second operand 13 states. [2020-10-15 00:01:48,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:48,833 INFO L93 Difference]: Finished difference Result 639 states and 890 transitions. [2020-10-15 00:01:48,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 00:01:48,833 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-15 00:01:48,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:48,836 INFO L225 Difference]: With dead ends: 639 [2020-10-15 00:01:48,837 INFO L226 Difference]: Without dead ends: 608 [2020-10-15 00:01:48,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:01:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2020-10-15 00:01:48,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 535. [2020-10-15 00:01:48,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-10-15 00:01:48,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 699 transitions. [2020-10-15 00:01:48,878 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 699 transitions. Word has length 39 [2020-10-15 00:01:48,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:48,878 INFO L479 AbstractCegarLoop]: Abstraction has 535 states and 699 transitions. [2020-10-15 00:01:48,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:01:48,878 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 699 transitions. [2020-10-15 00:01:48,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-15 00:01:48,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:48,880 INFO L422 BasicCegarLoop]: trace histogram [14, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:48,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-15 00:01:48,880 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:48,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:48,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1051328510, now seen corresponding path program 9 times [2020-10-15 00:01:48,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:48,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499165940] [2020-10-15 00:01:48,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:48,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:48,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:48,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:49,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:49,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:51,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:51,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-15 00:01:51,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:01:51,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2136 [2020-10-15 00:01:51,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:51,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:51,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-15 00:01:51,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:51,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-15 00:01:51,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:51,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:51,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:51,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:51,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:51,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:51,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:51,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:51,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:51,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:51,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:51,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:51,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-15 00:01:51,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499165940] [2020-10-15 00:01:51,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:51,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-15 00:01:51,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465987848] [2020-10-15 00:01:51,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 00:01:51,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:51,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 00:01:51,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:01:51,514 INFO L87 Difference]: Start difference. First operand 535 states and 699 transitions. Second operand 23 states. [2020-10-15 00:01:53,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:53,516 INFO L93 Difference]: Finished difference Result 1113 states and 1485 transitions. [2020-10-15 00:01:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 00:01:53,517 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 39 [2020-10-15 00:01:53,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:53,521 INFO L225 Difference]: With dead ends: 1113 [2020-10-15 00:01:53,521 INFO L226 Difference]: Without dead ends: 956 [2020-10-15 00:01:53,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=162, Invalid=1730, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 00:01:53,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2020-10-15 00:01:53,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 555. [2020-10-15 00:01:53,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2020-10-15 00:01:53,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 726 transitions. [2020-10-15 00:01:53,563 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 726 transitions. Word has length 39 [2020-10-15 00:01:53,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:53,563 INFO L479 AbstractCegarLoop]: Abstraction has 555 states and 726 transitions. [2020-10-15 00:01:53,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 00:01:53,563 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 726 transitions. [2020-10-15 00:01:53,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-15 00:01:53,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:53,565 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:53,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-15 00:01:53,566 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:53,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:53,566 INFO L82 PathProgramCache]: Analyzing trace with hash -2049757073, now seen corresponding path program 13 times [2020-10-15 00:01:53,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:53,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387413611] [2020-10-15 00:01:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:53,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:53,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:53,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:56,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:57,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:57,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 00:01:57,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:01:57,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3692 [2020-10-15 00:01:57,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:57,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:57,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-15 00:01:57,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:57,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-15 00:01:57,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:57,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:57,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:57,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:57,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:57,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:57,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:57,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:57,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:57,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:57,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:57,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:57,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-15 00:01:57,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387413611] [2020-10-15 00:01:57,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:57,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 00:01:57,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963700456] [2020-10-15 00:01:57,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 00:01:57,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:57,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 00:01:57,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:01:57,405 INFO L87 Difference]: Start difference. First operand 555 states and 726 transitions. Second operand 11 states. [2020-10-15 00:01:57,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:57,609 INFO L93 Difference]: Finished difference Result 618 states and 794 transitions. [2020-10-15 00:01:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:01:57,611 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-15 00:01:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:57,613 INFO L225 Difference]: With dead ends: 618 [2020-10-15 00:01:57,613 INFO L226 Difference]: Without dead ends: 595 [2020-10-15 00:01:57,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:01:57,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-15 00:01:57,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 555. [2020-10-15 00:01:57,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2020-10-15 00:01:57,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 730 transitions. [2020-10-15 00:01:57,660 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 730 transitions. Word has length 40 [2020-10-15 00:01:57,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:57,661 INFO L479 AbstractCegarLoop]: Abstraction has 555 states and 730 transitions. [2020-10-15 00:01:57,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 00:01:57,661 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 730 transitions. [2020-10-15 00:01:57,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-15 00:01:57,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:57,663 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:57,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-15 00:01:57,663 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:57,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:57,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1520391935, now seen corresponding path program 14 times [2020-10-15 00:01:57,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:57,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011619492] [2020-10-15 00:01:57,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:57,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:57,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:58,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:58,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:02,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:02,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 00:02:02,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:02:02,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-15 00:02:02,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:02,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:02,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 00:02:02,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-15 00:02:02,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-15 00:02:02,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:02,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:02,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:02,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:02,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:02,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:02,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:02,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:02,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:02,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:02,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:02,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:02,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-15 00:02:02,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011619492] [2020-10-15 00:02:02,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:02,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:02:02,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350201887] [2020-10-15 00:02:02,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:02:02,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:02,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:02:02,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:02:02,823 INFO L87 Difference]: Start difference. First operand 555 states and 730 transitions. Second operand 10 states. [2020-10-15 00:02:03,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:03,001 INFO L93 Difference]: Finished difference Result 953 states and 1151 transitions. [2020-10-15 00:02:03,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:02:03,003 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-15 00:02:03,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:03,006 INFO L225 Difference]: With dead ends: 953 [2020-10-15 00:02:03,006 INFO L226 Difference]: Without dead ends: 947 [2020-10-15 00:02:03,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:02:03,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2020-10-15 00:02:03,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 621. [2020-10-15 00:02:03,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-10-15 00:02:03,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 804 transitions. [2020-10-15 00:02:03,046 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 804 transitions. Word has length 40 [2020-10-15 00:02:03,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:03,046 INFO L479 AbstractCegarLoop]: Abstraction has 621 states and 804 transitions. [2020-10-15 00:02:03,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:02:03,046 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 804 transitions. [2020-10-15 00:02:03,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-15 00:02:03,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:03,048 INFO L422 BasicCegarLoop]: trace histogram [15, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:03,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-15 00:02:03,048 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:03,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:03,049 INFO L82 PathProgramCache]: Analyzing trace with hash 2094011533, now seen corresponding path program 10 times [2020-10-15 00:02:03,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:03,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644787342] [2020-10-15 00:02:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:03,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:03,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:03,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:03,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:06,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:06,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 00:02:06,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:02:06,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3170 [2020-10-15 00:02:06,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:06,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:06,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-15 00:02:06,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:06,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-15 00:02:06,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:06,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:06,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:06,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:06,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:06,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:06,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:06,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:06,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:06,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:06,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:06,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:06,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-15 00:02:06,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644787342] [2020-10-15 00:02:06,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:06,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-15 00:02:06,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114369282] [2020-10-15 00:02:06,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 00:02:06,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:06,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 00:02:06,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:02:06,716 INFO L87 Difference]: Start difference. First operand 621 states and 804 transitions. Second operand 24 states. [2020-10-15 00:02:08,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:08,957 INFO L93 Difference]: Finished difference Result 1259 states and 1672 transitions. [2020-10-15 00:02:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 00:02:08,958 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 40 [2020-10-15 00:02:08,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:08,962 INFO L225 Difference]: With dead ends: 1259 [2020-10-15 00:02:08,962 INFO L226 Difference]: Without dead ends: 1090 [2020-10-15 00:02:08,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=164, Invalid=1816, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 00:02:08,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2020-10-15 00:02:09,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 641. [2020-10-15 00:02:09,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 641 states. [2020-10-15 00:02:09,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 831 transitions. [2020-10-15 00:02:09,003 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 831 transitions. Word has length 40 [2020-10-15 00:02:09,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:09,003 INFO L479 AbstractCegarLoop]: Abstraction has 641 states and 831 transitions. [2020-10-15 00:02:09,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 00:02:09,003 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 831 transitions. [2020-10-15 00:02:09,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-15 00:02:09,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:09,005 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:09,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-15 00:02:09,006 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:09,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:09,006 INFO L82 PathProgramCache]: Analyzing trace with hash 2036483073, now seen corresponding path program 15 times [2020-10-15 00:02:09,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:09,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002533945] [2020-10-15 00:02:09,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:09,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:09,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:09,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:14,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:14,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-15 00:02:14,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:14,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 00:02:14,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:14,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:14,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:02:14,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-15 00:02:14,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-15 00:02:14,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:14,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:14,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:14,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:14,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:14,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:14,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:14,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:14,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:14,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:14,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:14,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:14,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-15 00:02:14,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002533945] [2020-10-15 00:02:14,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:14,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:02:14,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195338867] [2020-10-15 00:02:14,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:02:14,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:14,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:02:14,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:02:14,249 INFO L87 Difference]: Start difference. First operand 641 states and 831 transitions. Second operand 14 states. [2020-10-15 00:02:21,953 WARN L193 SmtUtils]: Spent 4.74 s on a formula simplification that was a NOOP. DAG size: 40 [2020-10-15 00:02:23,298 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-10-15 00:02:29,991 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-15 00:02:32,084 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~z~0 3))) (and (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 4)) 4294967296)) 4294967298)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 2)) 4294967296)) 4294967296)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 3)) 4294967296)) 4294967297)) (<= .cse0 c_main_~y~0) (<= (+ (* 4294967296 (div c_main_~y~0 4294967296)) 1) c_main_~y~0) (<= c_main_~y~0 .cse0))) is different from false [2020-10-15 00:02:38,880 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 24