/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:18:53,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:18:53,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:18:53,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:18:53,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:18:53,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:18:53,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:18:53,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:18:53,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:18:53,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:18:53,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:18:53,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:18:53,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:18:53,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:18:53,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:18:53,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:18:53,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:18:53,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:18:53,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:18:53,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:18:53,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:18:53,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:18:53,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:18:53,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:18:53,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:18:53,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:18:53,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:18:53,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:18:53,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:18:53,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:18:53,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:18:53,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:18:53,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:18:53,526 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:18:53,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:18:53,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:18:53,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:18:53,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:18:53,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:18:53,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:18:53,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:18:53,534 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 23:18:53,572 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:18:53,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:18:53,574 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:18:53,574 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:18:53,575 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:18:53,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:18:53,575 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:18:53,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:18:53,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:18:53,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:18:53,577 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:18:53,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:18:53,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:18:53,578 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:18:53,578 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:18:53,578 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:18:53,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:18:53,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:18:53,579 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:18:53,579 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:18:53,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:18:53,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:18:53,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:18:53,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:18:53,580 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:18:53,580 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:18:53,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:18:53,581 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:18:53,581 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:18:53,581 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:18:53,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:18:53,902 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:18:53,905 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:18:53,907 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:18:53,907 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:18:53,908 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const1.c [2020-10-13 23:18:53,979 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2457a8d6/3825889b076843cb997c9b08d7dd8de5/FLAGdfd5519a5 [2020-10-13 23:18:54,439 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:18:54,439 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const1.c [2020-10-13 23:18:54,445 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2457a8d6/3825889b076843cb997c9b08d7dd8de5/FLAGdfd5519a5 [2020-10-13 23:18:54,809 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f2457a8d6/3825889b076843cb997c9b08d7dd8de5 [2020-10-13 23:18:54,817 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:18:54,818 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:18:54,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:18:54,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:18:54,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:18:54,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:18:54" (1/1) ... [2020-10-13 23:18:54,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77dd261d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:54, skipping insertion in model container [2020-10-13 23:18:54,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:18:54" (1/1) ... [2020-10-13 23:18:54,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:18:54,855 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:18:55,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:18:55,053 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:18:55,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:18:55,090 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:18:55,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:55 WrapperNode [2020-10-13 23:18:55,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:18:55,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:18:55,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:18:55,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:18:55,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:55" (1/1) ... [2020-10-13 23:18:55,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:55" (1/1) ... [2020-10-13 23:18:55,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:55" (1/1) ... [2020-10-13 23:18:55,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:55" (1/1) ... [2020-10-13 23:18:55,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:55" (1/1) ... [2020-10-13 23:18:55,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:55" (1/1) ... [2020-10-13 23:18:55,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:55" (1/1) ... [2020-10-13 23:18:55,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:18:55,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:18:55,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:18:55,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:18:55,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:18:55,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:18:55,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:18:55,332 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 23:18:55,332 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:18:55,332 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:18:55,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:18:55,333 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 23:18:55,333 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 23:18:55,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:18:55,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-13 23:18:55,333 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 23:18:55,334 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:18:55,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 23:18:55,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:18:55,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:18:55,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:18:55,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:18:55,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:18:55,601 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:18:55,601 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 23:18:55,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:18:55 BoogieIcfgContainer [2020-10-13 23:18:55,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:18:55,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:18:55,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:18:55,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:18:55,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:18:54" (1/3) ... [2020-10-13 23:18:55,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bbcc0f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:18:55, skipping insertion in model container [2020-10-13 23:18:55,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:55" (2/3) ... [2020-10-13 23:18:55,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bbcc0f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:18:55, skipping insertion in model container [2020-10-13 23:18:55,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:18:55" (3/3) ... [2020-10-13 23:18:55,614 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const1.c [2020-10-13 23:18:55,626 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:18:55,633 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:18:55,649 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:18:55,676 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:18:55,676 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:18:55,676 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:18:55,677 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:18:55,677 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:18:55,677 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:18:55,677 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:18:55,677 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:18:55,701 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-13 23:18:55,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 23:18:55,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:18:55,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:18:55,719 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:18:55,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:18:55,728 INFO L82 PathProgramCache]: Analyzing trace with hash -378544401, now seen corresponding path program 1 times [2020-10-13 23:18:55,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:18:55,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741827822] [2020-10-13 23:18:55,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:18:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:55,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:55,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:56,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:56,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:56,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:56,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 23:18:56,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:18:56,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-10-13 23:18:56,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:56,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:56,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:18:56,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:18:56,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:18:56,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-13 23:18:56,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:18:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:56,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:56,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:56,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:18:56,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:18:56,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 23:18:56,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:56,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:56,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:18:56,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:18:56,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:18:56,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:18:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:18:56,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741827822] [2020-10-13 23:18:56,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:18:56,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:18:56,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378219436] [2020-10-13 23:18:56,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:18:56,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:18:56,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:18:56,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:18:56,392 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-13 23:18:56,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:18:56,483 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-10-13 23:18:56,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:18:56,485 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-13 23:18:56,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:18:56,494 INFO L225 Difference]: With dead ends: 45 [2020-10-13 23:18:56,495 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 23:18:56,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:18:56,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 23:18:56,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-13 23:18:56,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 23:18:56,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-13 23:18:56,544 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2020-10-13 23:18:56,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:18:56,545 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-13 23:18:56,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:18:56,545 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-13 23:18:56,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 23:18:56,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:18:56,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:18:56,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:18:56,547 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:18:56,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:18:56,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1414140317, now seen corresponding path program 1 times [2020-10-13 23:18:56,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:18:56,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979961318] [2020-10-13 23:18:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:18:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:56,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:56,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:56,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:56,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:57,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:57,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 23:18:57,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:18:57,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 510 [2020-10-13 23:18:57,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:57,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:57,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:18:57,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:18:57,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:18:57,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:18:57,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:18:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:57,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:57,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:57,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:18:57,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:18:57,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:18:57,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:57,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:57,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:18:57,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:18:57,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:18:57,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-13 23:18:57,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:18:57,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979961318] [2020-10-13 23:18:57,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:18:57,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:18:57,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641415204] [2020-10-13 23:18:57,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:18:57,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:18:57,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:18:57,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:18:57,177 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-10-13 23:18:57,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:18:57,286 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-10-13 23:18:57,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:18:57,287 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 23:18:57,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:18:57,288 INFO L225 Difference]: With dead ends: 33 [2020-10-13 23:18:57,288 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 23:18:57,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:18:57,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 23:18:57,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-13 23:18:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 23:18:57,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-13 23:18:57,301 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-10-13 23:18:57,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:18:57,302 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-13 23:18:57,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:18:57,302 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-13 23:18:57,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 23:18:57,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:18:57,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:18:57,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:18:57,304 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:18:57,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:18:57,304 INFO L82 PathProgramCache]: Analyzing trace with hash 24846977, now seen corresponding path program 1 times [2020-10-13 23:18:57,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:18:57,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306844904] [2020-10-13 23:18:57,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:18:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:57,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:57,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:57,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:57,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:57,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:57,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 23:18:57,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:18:57,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 469 [2020-10-13 23:18:57,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:57,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:57,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:18:57,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:18:57,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:18:57,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:18:57,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:18:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:57,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:57,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:57,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:18:57,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:18:57,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:18:57,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:57,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:57,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:18:57,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:18:57,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:18:57,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:18:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:18:57,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306844904] [2020-10-13 23:18:57,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:18:57,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 23:18:57,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208911816] [2020-10-13 23:18:57,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:18:57,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:18:57,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:18:57,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:18:57,880 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2020-10-13 23:18:58,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:18:58,040 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-10-13 23:18:58,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:18:58,041 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-13 23:18:58,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:18:58,042 INFO L225 Difference]: With dead ends: 29 [2020-10-13 23:18:58,042 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 23:18:58,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:18:58,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 23:18:58,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 23:18:58,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 23:18:58,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-13 23:18:58,049 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2020-10-13 23:18:58,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:18:58,050 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-13 23:18:58,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:18:58,050 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-13 23:18:58,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 23:18:58,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:18:58,051 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] [2020-10-13 23:18:58,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:18:58,052 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:18:58,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:18:58,052 INFO L82 PathProgramCache]: Analyzing trace with hash -181217569, now seen corresponding path program 1 times [2020-10-13 23:18:58,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:18:58,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143131906] [2020-10-13 23:18:58,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:18:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:58,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:58,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:58,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:58,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:58,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:58,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 23:18:58,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:18:58,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-10-13 23:18:58,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:58,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:58,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:18:58,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:18:58,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:18:58,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:18:58,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:18:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:58,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:58,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:58,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:18:58,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:18:58,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:18:58,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:58,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:58,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:18:58,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:18:58,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:18:58,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:18:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:18:58,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143131906] [2020-10-13 23:18:58,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:18:58,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:18:58,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031566427] [2020-10-13 23:18:58,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:18:58,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:18:58,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:18:58,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:18:58,541 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 5 states. [2020-10-13 23:18:58,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:18:58,640 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-10-13 23:18:58,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:18:58,641 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 23:18:58,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:18:58,642 INFO L225 Difference]: With dead ends: 35 [2020-10-13 23:18:58,642 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 23:18:58,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:18:58,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 23:18:58,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-13 23:18:58,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 23:18:58,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-13 23:18:58,649 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-10-13 23:18:58,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:18:58,649 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-13 23:18:58,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:18:58,649 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-13 23:18:58,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 23:18:58,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:18:58,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:18:58,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:18:58,651 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:18:58,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:18:58,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1338053763, now seen corresponding path program 1 times [2020-10-13 23:18:58,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:18:58,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172186135] [2020-10-13 23:18:58,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:18:58,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:58,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:58,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:58,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:58,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:59,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:59,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:59,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 23:18:59,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:18:59,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1083 [2020-10-13 23:18:59,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:59,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:59,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:18:59,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:18:59,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:18:59,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:18:59,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:18:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:59,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:59,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:59,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:18:59,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:18:59,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:18:59,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:59,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:59,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:18:59,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:18:59,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:18:59,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:18:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:18:59,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172186135] [2020-10-13 23:18:59,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:18:59,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:18:59,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113040204] [2020-10-13 23:18:59,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:18:59,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:18:59,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:18:59,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:18:59,823 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-13 23:18:59,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:18:59,976 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-10-13 23:18:59,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:18:59,976 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-13 23:18:59,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:18:59,977 INFO L225 Difference]: With dead ends: 42 [2020-10-13 23:18:59,977 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 23:18:59,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:18:59,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 23:18:59,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 23:18:59,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 23:18:59,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-13 23:18:59,984 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-10-13 23:18:59,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:18:59,985 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-13 23:18:59,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:18:59,985 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-13 23:18:59,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 23:18:59,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:18:59,986 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:18:59,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:18:59,987 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:18:59,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:18:59,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1075581673, now seen corresponding path program 2 times [2020-10-13 23:18:59,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:18:59,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544442181] [2020-10-13 23:18:59,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:00,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:01,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:01,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:01,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:03,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:03,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 23:19:03,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:19:03,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3827 [2020-10-13 23:19:03,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:03,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:03,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:19:03,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:03,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:19:03,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:04,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:04,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:04,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:04,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:04,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:04,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:19:04,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:04,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:04,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:04,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:04,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:04,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:19:04,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544442181] [2020-10-13 23:19:04,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:04,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:19:04,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24861456] [2020-10-13 23:19:04,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:19:04,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:04,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:19:04,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:19:04,294 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 14 states. [2020-10-13 23:19:04,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:04,598 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-10-13 23:19:04,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:19:04,599 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-13 23:19:04,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:04,600 INFO L225 Difference]: With dead ends: 42 [2020-10-13 23:19:04,600 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 23:19:04,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:19:04,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 23:19:04,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-10-13 23:19:04,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 23:19:04,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-13 23:19:04,607 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 28 [2020-10-13 23:19:04,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:04,608 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-13 23:19:04,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:19:04,608 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-13 23:19:04,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:19:04,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:04,609 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:04,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:19:04,609 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:04,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:04,610 INFO L82 PathProgramCache]: Analyzing trace with hash 2014917621, now seen corresponding path program 3 times [2020-10-13 23:19:04,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:04,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629425919] [2020-10-13 23:19:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:04,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:04,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:05,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:05,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 23:19:05,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:19:05,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 844 [2020-10-13 23:19:05,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:05,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:05,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:19:05,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 23:19:05,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:19:05,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:05,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:05,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:05,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:05,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:05,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:05,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:05,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:05,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:05,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:05,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:05,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:05,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:19:05,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629425919] [2020-10-13 23:19:05,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:05,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:19:05,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006773902] [2020-10-13 23:19:05,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:19:05,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:05,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:19:05,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:19:05,572 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 10 states. [2020-10-13 23:19:05,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:05,911 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-10-13 23:19:05,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:19:05,912 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-13 23:19:05,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:05,913 INFO L225 Difference]: With dead ends: 60 [2020-10-13 23:19:05,913 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 23:19:05,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:19:05,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 23:19:05,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2020-10-13 23:19:05,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 23:19:05,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-10-13 23:19:05,921 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 30 [2020-10-13 23:19:05,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:05,921 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-10-13 23:19:05,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:19:05,921 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-10-13 23:19:05,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:19:05,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:05,923 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:05,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:19:05,923 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:05,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:05,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1828498507, now seen corresponding path program 4 times [2020-10-13 23:19:05,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:05,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793593293] [2020-10-13 23:19:05,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:05,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:05,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:06,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:06,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 23:19:06,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:19:06,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 669 [2020-10-13 23:19:06,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:06,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:06,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:19:06,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:06,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:19:06,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:06,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:06,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:06,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:06,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:06,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:06,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:06,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:06,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:06,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:06,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:06,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:06,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:06,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:19:06,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793593293] [2020-10-13 23:19:06,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:06,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:19:06,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996789959] [2020-10-13 23:19:06,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:19:06,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:06,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:19:06,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:19:06,702 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 10 states. [2020-10-13 23:19:06,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:06,941 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-10-13 23:19:06,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:19:06,941 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-13 23:19:06,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:06,942 INFO L225 Difference]: With dead ends: 65 [2020-10-13 23:19:06,943 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 23:19:06,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:19:06,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 23:19:06,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-10-13 23:19:06,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 23:19:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-13 23:19:06,949 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2020-10-13 23:19:06,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:06,950 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-13 23:19:06,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:19:06,950 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-13 23:19:06,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 23:19:06,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:06,951 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:06,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:19:06,951 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:06,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:06,952 INFO L82 PathProgramCache]: Analyzing trace with hash 868717361, now seen corresponding path program 5 times [2020-10-13 23:19:06,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:06,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081991227] [2020-10-13 23:19:06,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:06,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:07,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:07,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:07,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:07,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:07,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:08,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:09,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:10,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:10,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:10,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:10,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:11,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:11,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:11,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:11,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:11,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:11,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 23:19:11,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 23:19:11,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:19:11,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:11,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:11,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:19:11,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:11,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:19:11,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:12,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:12,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:12,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:12,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:12,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:12,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:12,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:12,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:12,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:12,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:12,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:12,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:19:12,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081991227] [2020-10-13 23:19:12,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:12,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:19:12,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629541411] [2020-10-13 23:19:12,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:19:12,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:12,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:19:12,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:19:12,845 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 23 states. [2020-10-13 23:19:13,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:13,598 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-10-13 23:19:13,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:19:13,599 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 34 [2020-10-13 23:19:13,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:13,600 INFO L225 Difference]: With dead ends: 59 [2020-10-13 23:19:13,601 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 23:19:13,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:19:13,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 23:19:13,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-10-13 23:19:13,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 23:19:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-13 23:19:13,610 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 34 [2020-10-13 23:19:13,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:13,610 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-13 23:19:13,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:19:13,611 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-13 23:19:13,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 23:19:13,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:13,612 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:13,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:19:13,614 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:13,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:13,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1816876145, now seen corresponding path program 6 times [2020-10-13 23:19:13,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:13,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905667043] [2020-10-13 23:19:13,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:13,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:13,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:14,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:14,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 23:19:14,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:19:14,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1276 [2020-10-13 23:19:14,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:14,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:14,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:19:14,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:19:14,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:19:14,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:14,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:14,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:14,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:14,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:14,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:14,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:14,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:14,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:14,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:14,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:14,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:15,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:19:15,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905667043] [2020-10-13 23:19:15,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:15,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:19:15,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246847140] [2020-10-13 23:19:15,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:19:15,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:15,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:19:15,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:19:15,006 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 12 states. [2020-10-13 23:19:15,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:15,364 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-13 23:19:15,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:19:15,365 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-13 23:19:15,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:15,366 INFO L225 Difference]: With dead ends: 70 [2020-10-13 23:19:15,366 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 23:19:15,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:19:15,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 23:19:15,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2020-10-13 23:19:15,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 23:19:15,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-13 23:19:15,375 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 36 [2020-10-13 23:19:15,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:15,376 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-13 23:19:15,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:19:15,376 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-13 23:19:15,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 23:19:15,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:15,377 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:15,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:19:15,377 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:15,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:15,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1667900593, now seen corresponding path program 7 times [2020-10-13 23:19:15,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:15,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794501377] [2020-10-13 23:19:15,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:15,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:15,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:17,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:17,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 23:19:17,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:19:17,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1612 [2020-10-13 23:19:17,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:17,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:17,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:19:17,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:17,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:19:17,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:17,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:17,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:17,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:17,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:17,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:17,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:17,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:17,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:17,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:17,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:17,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:17,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:19:17,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794501377] [2020-10-13 23:19:17,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:17,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:19:17,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226738975] [2020-10-13 23:19:17,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:19:17,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:17,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:19:17,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:19:17,151 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 12 states. [2020-10-13 23:19:17,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:17,419 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2020-10-13 23:19:17,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:19:17,420 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-13 23:19:17,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:17,421 INFO L225 Difference]: With dead ends: 77 [2020-10-13 23:19:17,421 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 23:19:17,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:19:17,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 23:19:17,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-10-13 23:19:17,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 23:19:17,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-13 23:19:17,429 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2020-10-13 23:19:17,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:17,430 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-13 23:19:17,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:19:17,430 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-13 23:19:17,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 23:19:17,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:17,431 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:17,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:19:17,432 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:17,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:17,432 INFO L82 PathProgramCache]: Analyzing trace with hash -23822901, now seen corresponding path program 8 times [2020-10-13 23:19:17,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:17,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177641626] [2020-10-13 23:19:17,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:17,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:17,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:17,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:18,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:18,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:18,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:18,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:18,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:19,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:19,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:20,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:21,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:21,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:21,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:21,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:21,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:22,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:22,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:22,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 23:19:22,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 23:19:22,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:19:22,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:22,451 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:22,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:19:22,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:22,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:19:22,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:23,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:23,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:23,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:23,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:23,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:23,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:23,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:23,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:23,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:23,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:23,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:23,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:19:23,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177641626] [2020-10-13 23:19:23,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:23,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:19:23,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474292865] [2020-10-13 23:19:23,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:19:23,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:23,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:19:23,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:19:23,783 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 28 states. [2020-10-13 23:19:25,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:25,205 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-10-13 23:19:25,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:19:25,206 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 40 [2020-10-13 23:19:25,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:25,207 INFO L225 Difference]: With dead ends: 70 [2020-10-13 23:19:25,207 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 23:19:25,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=181, Invalid=1379, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:19:25,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 23:19:25,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-13 23:19:25,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 23:19:25,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-10-13 23:19:25,229 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 40 [2020-10-13 23:19:25,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:25,229 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-10-13 23:19:25,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:19:25,230 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-10-13 23:19:25,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 23:19:25,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:25,233 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:25,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:19:25,233 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:25,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:25,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1837217879, now seen corresponding path program 9 times [2020-10-13 23:19:25,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:25,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178767251] [2020-10-13 23:19:25,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:25,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:25,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:27,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:27,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 23:19:27,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:19:27,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2365 [2020-10-13 23:19:27,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:27,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:27,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:19:27,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 23:19:27,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:19:27,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:27,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:27,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:27,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:27,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:27,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:27,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:27,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:27,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:27,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:27,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:27,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:27,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 23:19:27,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178767251] [2020-10-13 23:19:27,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:27,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:19:27,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146651245] [2020-10-13 23:19:27,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:19:27,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:27,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:19:27,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:19:27,731 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 14 states. [2020-10-13 23:19:28,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:28,131 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-10-13 23:19:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:19:28,131 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-13 23:19:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:28,132 INFO L225 Difference]: With dead ends: 72 [2020-10-13 23:19:28,132 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 23:19:28,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:19:28,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 23:19:28,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-10-13 23:19:28,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 23:19:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-13 23:19:28,145 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2020-10-13 23:19:28,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:28,145 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-13 23:19:28,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:19:28,146 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-13 23:19:28,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 23:19:28,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:28,148 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:28,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:19:28,149 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:28,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:28,149 INFO L82 PathProgramCache]: Analyzing trace with hash 678515143, now seen corresponding path program 10 times [2020-10-13 23:19:28,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:28,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316857199] [2020-10-13 23:19:28,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:28,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:28,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:29,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:29,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:31,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:32,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:32,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:33,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:33,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 23:19:33,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:19:33,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:19:33,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:33,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:33,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:19:33,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:33,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:19:33,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:33,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:33,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:33,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:33,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:33,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:33,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:33,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:33,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:33,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:33,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:33,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:33,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 23:19:33,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316857199] [2020-10-13 23:19:33,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:33,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:19:33,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826296636] [2020-10-13 23:19:33,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:19:33,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:33,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:19:33,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:19:33,280 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 14 states. [2020-10-13 23:19:33,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:33,547 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2020-10-13 23:19:33,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:19:33,547 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-10-13 23:19:33,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:33,548 INFO L225 Difference]: With dead ends: 79 [2020-10-13 23:19:33,548 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 23:19:33,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:19:33,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 23:19:33,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-13 23:19:33,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 23:19:33,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-13 23:19:33,558 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2020-10-13 23:19:33,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:33,558 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-13 23:19:33,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:19:33,558 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-13 23:19:33,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 23:19:33,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:33,559 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:33,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:19:33,560 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:33,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:33,560 INFO L82 PathProgramCache]: Analyzing trace with hash -427995931, now seen corresponding path program 11 times [2020-10-13 23:19:33,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:33,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271364367] [2020-10-13 23:19:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:33,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:33,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:34,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:34,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:35,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:35,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:35,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:36,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:36,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:36,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:37,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:37,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:37,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:38,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:38,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:38,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:38,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:38,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:19:38,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 23:19:38,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-13 23:19:38,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:38,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:38,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:19:38,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:38,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:19:38,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:39,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:39,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:39,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:39,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:39,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:39,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:39,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:39,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:39,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:39,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:39,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:39,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:19:39,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271364367] [2020-10-13 23:19:39,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:39,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:19:39,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334686147] [2020-10-13 23:19:39,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:19:39,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:39,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:19:39,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:19:39,847 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 33 states. [2020-10-13 23:19:41,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:41,849 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2020-10-13 23:19:41,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 23:19:41,850 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 46 [2020-10-13 23:19:41,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:41,851 INFO L225 Difference]: With dead ends: 79 [2020-10-13 23:19:41,851 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 23:19:41,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=227, Invalid=2425, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 23:19:41,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 23:19:41,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-10-13 23:19:41,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:19:41,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-10-13 23:19:41,868 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 46 [2020-10-13 23:19:41,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:41,868 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-10-13 23:19:41,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:19:41,869 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-10-13 23:19:41,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 23:19:41,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:41,870 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:41,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:19:41,870 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:41,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:41,870 INFO L82 PathProgramCache]: Analyzing trace with hash 662743107, now seen corresponding path program 12 times [2020-10-13 23:19:41,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:41,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043791408] [2020-10-13 23:19:41,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:41,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:41,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:43,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:43,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 23:19:43,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:19:43,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2030 [2020-10-13 23:19:43,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:43,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:43,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:19:43,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 23:19:43,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:19:43,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:44,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:44,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:44,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:44,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:44,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:44,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:44,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:44,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:44,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:44,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:44,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:44,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 23:19:44,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043791408] [2020-10-13 23:19:44,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:44,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:19:44,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443441910] [2020-10-13 23:19:44,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:19:44,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:44,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:19:44,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:19:44,054 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 16 states. [2020-10-13 23:19:44,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:44,711 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-10-13 23:19:44,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:19:44,711 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-13 23:19:44,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:44,712 INFO L225 Difference]: With dead ends: 94 [2020-10-13 23:19:44,712 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 23:19:44,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:19:44,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 23:19:44,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-13 23:19:44,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 23:19:44,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-10-13 23:19:44,725 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 48 [2020-10-13 23:19:44,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:44,725 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-10-13 23:19:44,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:19:44,725 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-10-13 23:19:44,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 23:19:44,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:44,726 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:44,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:19:44,727 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:44,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:44,727 INFO L82 PathProgramCache]: Analyzing trace with hash 2026108931, now seen corresponding path program 13 times [2020-10-13 23:19:44,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:44,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282071228] [2020-10-13 23:19:44,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:44,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:44,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:46,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:46,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 23:19:46,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:19:46,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1648 [2020-10-13 23:19:46,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:46,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:46,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:19:46,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:46,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:19:46,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:46,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:46,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:46,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:46,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:46,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:46,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:46,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:46,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:46,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:46,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:46,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:46,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 23:19:46,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282071228] [2020-10-13 23:19:46,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:46,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:19:46,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132083222] [2020-10-13 23:19:46,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:19:46,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:46,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:19:46,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:19:46,531 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 16 states. [2020-10-13 23:19:46,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:46,883 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2020-10-13 23:19:46,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:19:46,884 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-13 23:19:46,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:46,885 INFO L225 Difference]: With dead ends: 101 [2020-10-13 23:19:46,885 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 23:19:46,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:19:46,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 23:19:46,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-13 23:19:46,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 23:19:46,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-13 23:19:46,907 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 48 [2020-10-13 23:19:46,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:46,908 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-13 23:19:46,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:19:46,908 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-13 23:19:46,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:19:46,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:46,909 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:46,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:19:46,909 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:46,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:46,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1060937855, now seen corresponding path program 14 times [2020-10-13 23:19:46,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:46,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57604069] [2020-10-13 23:19:46,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:46,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:47,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:47,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:48,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:48,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:48,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:49,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:49,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:49,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:50,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:51,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:51,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:51,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:51,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:51,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:19:51,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 23:19:51,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:19:51,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:51,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:51,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 23:19:51,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:51,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 23:19:51,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:53,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:53,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:53,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:53,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:53,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:53,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:53,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:53,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:53,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:53,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:53,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:53,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 4 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:19:53,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57604069] [2020-10-13 23:19:53,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:53,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 23:19:53,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928842039] [2020-10-13 23:19:53,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 23:19:53,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:53,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 23:19:53,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:19:53,588 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 38 states. [2020-10-13 23:19:54,779 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-13 23:19:56,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:56,157 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2020-10-13 23:19:56,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 23:19:56,158 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 52 [2020-10-13 23:19:56,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:56,159 INFO L225 Difference]: With dead ends: 93 [2020-10-13 23:19:56,159 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 23:19:56,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=375, Invalid=3165, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 23:19:56,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 23:19:56,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2020-10-13 23:19:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 23:19:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-13 23:19:56,171 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 52 [2020-10-13 23:19:56,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:56,172 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-13 23:19:56,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 23:19:56,172 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-13 23:19:56,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 23:19:56,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:56,172 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:56,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:19:56,173 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:56,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:56,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1627599587, now seen corresponding path program 15 times [2020-10-13 23:19:56,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:56,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386847068] [2020-10-13 23:19:56,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:56,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:56,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:58,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:58,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:19:58,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:19:58,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2668 [2020-10-13 23:19:58,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:58,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:58,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:19:58,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:58,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:19:58,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:59,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:59,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:59,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:59,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:59,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:59,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:59,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:59,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:59,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:59,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:59,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:59,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:59,074 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:19:59,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386847068] [2020-10-13 23:19:59,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:59,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:19:59,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267223761] [2020-10-13 23:19:59,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:19:59,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:59,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:19:59,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:19:59,077 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 18 states. [2020-10-13 23:19:59,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:59,560 INFO L93 Difference]: Finished difference Result 132 states and 139 transitions. [2020-10-13 23:19:59,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:19:59,561 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2020-10-13 23:19:59,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:59,562 INFO L225 Difference]: With dead ends: 132 [2020-10-13 23:19:59,562 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 23:19:59,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:19:59,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 23:19:59,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2020-10-13 23:19:59,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 23:19:59,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-10-13 23:19:59,588 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 54 [2020-10-13 23:19:59,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:59,590 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-10-13 23:19:59,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:19:59,591 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-10-13 23:19:59,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 23:19:59,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:59,591 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:59,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:19:59,592 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:59,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:59,592 INFO L82 PathProgramCache]: Analyzing trace with hash 992124317, now seen corresponding path program 16 times [2020-10-13 23:19:59,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:59,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062532999] [2020-10-13 23:19:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:59,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:59,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:00,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:01,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:02,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:02,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:03,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:04,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:04,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:04,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:20:04,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:20:04,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:20:04,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:04,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:04,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:20:04,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:04,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:20:04,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:04,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:04,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:04,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:04,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:04,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:04,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:20:04,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:04,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:04,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:04,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:04,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:04,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:20:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:20:04,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062532999] [2020-10-13 23:20:04,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:04,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:20:04,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194557270] [2020-10-13 23:20:04,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:20:04,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:04,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:20:04,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:20:04,817 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 18 states. [2020-10-13 23:20:05,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:05,409 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2020-10-13 23:20:05,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:20:05,411 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2020-10-13 23:20:05,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:05,412 INFO L225 Difference]: With dead ends: 78 [2020-10-13 23:20:05,412 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 23:20:05,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=813, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:20:05,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 23:20:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-13 23:20:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 23:20:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-13 23:20:05,421 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 54 [2020-10-13 23:20:05,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:05,421 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-13 23:20:05,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:20:05,421 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-13 23:20:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 23:20:05,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:05,422 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:20:05,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:20:05,422 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:05,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:05,422 INFO L82 PathProgramCache]: Analyzing trace with hash 605362329, now seen corresponding path program 17 times [2020-10-13 23:20:05,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:05,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234460237] [2020-10-13 23:20:05,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:05,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:05,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:05,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:06,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:06,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:06,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:07,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:07,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:08,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:08,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:08,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:09,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:09,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:09,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:10,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:10,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:10,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:10,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 23:20:10,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 23:20:10,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:20:10,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:10,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:10,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 23:20:10,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:10,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 23:20:10,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:13,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:13,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:13,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:13,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:13,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:13,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:13,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:13,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:13,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:13,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:13,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:13,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 30 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:20:13,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234460237] [2020-10-13 23:20:13,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:13,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 23:20:13,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003956071] [2020-10-13 23:20:13,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 23:20:13,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:13,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 23:20:13,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1583, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:20:13,239 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 43 states. [2020-10-13 23:20:13,460 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2020-10-13 23:20:14,284 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-13 23:20:14,614 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-13 23:20:14,959 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2020-10-13 23:20:15,293 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2020-10-13 23:20:15,616 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-13 23:20:16,092 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2020-10-13 23:20:17,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:17,286 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2020-10-13 23:20:17,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-13 23:20:17,290 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 58 [2020-10-13 23:20:17,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:17,291 INFO L225 Difference]: With dead ends: 102 [2020-10-13 23:20:17,291 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 23:20:17,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=471, Invalid=3689, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 23:20:17,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 23:20:17,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2020-10-13 23:20:17,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:20:17,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-10-13 23:20:17,313 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 58 [2020-10-13 23:20:17,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:17,314 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-10-13 23:20:17,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 23:20:17,314 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-10-13 23:20:17,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 23:20:17,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:17,316 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:20:17,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:20:17,317 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:17,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:17,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1409431287, now seen corresponding path program 18 times [2020-10-13 23:20:17,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:17,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867186908] [2020-10-13 23:20:17,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:17,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:17,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:21,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:21,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 23:20:21,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:20:21,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4466 [2020-10-13 23:20:21,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:21,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:21,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:20:21,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 23:20:21,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:20:21,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:22,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:22,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:22,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:22,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:22,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:22,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:20:22,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:22,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:22,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:22,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:22,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:22,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:22,025 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 23:20:22,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867186908] [2020-10-13 23:20:22,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:22,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:20:22,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859321837] [2020-10-13 23:20:22,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:20:22,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:22,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:20:22,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:20:22,027 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 20 states. [2020-10-13 23:20:22,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:22,936 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2020-10-13 23:20:22,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:20:22,940 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2020-10-13 23:20:22,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:22,941 INFO L225 Difference]: With dead ends: 102 [2020-10-13 23:20:22,941 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 23:20:22,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=1083, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:20:22,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 23:20:22,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 63. [2020-10-13 23:20:22,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 23:20:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-13 23:20:22,952 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2020-10-13 23:20:22,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:22,952 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-13 23:20:22,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:20:22,952 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-13 23:20:22,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:20:22,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:22,953 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:20:22,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:20:22,953 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:22,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:22,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1732860523, now seen corresponding path program 19 times [2020-10-13 23:20:22,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:22,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773828647] [2020-10-13 23:20:22,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:22,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:23,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:26,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:27,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:28,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:28,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:20:28,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:20:28,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5105 [2020-10-13 23:20:28,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:28,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:28,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:20:28,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:28,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:20:28,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:28,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:28,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:28,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:28,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:28,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:28,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:28,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:28,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:28,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:28,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:28,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:28,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 23:20:28,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773828647] [2020-10-13 23:20:28,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:28,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:20:28,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639375167] [2020-10-13 23:20:28,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:20:28,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:28,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:20:28,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:20:28,267 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 20 states. [2020-10-13 23:20:28,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:28,685 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2020-10-13 23:20:28,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:20:28,686 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2020-10-13 23:20:28,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:28,687 INFO L225 Difference]: With dead ends: 109 [2020-10-13 23:20:28,687 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 23:20:28,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:20:28,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 23:20:28,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-10-13 23:20:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 23:20:28,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-13 23:20:28,698 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2020-10-13 23:20:28,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:28,699 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-13 23:20:28,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:20:28,699 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-13 23:20:28,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 23:20:28,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:28,700 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:20:28,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:20:28,700 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:28,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:28,700 INFO L82 PathProgramCache]: Analyzing trace with hash 835802419, now seen corresponding path program 20 times [2020-10-13 23:20:28,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:28,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896643242] [2020-10-13 23:20:28,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:28,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:29,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:29,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:30,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:30,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:30,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:31,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:31,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:32,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:32,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:32,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:32,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:33,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:33,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:33,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:33,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 23:20:33,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 23:20:33,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-13 23:20:33,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:33,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:33,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 23:20:33,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:33,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 23:20:33,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:38,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:38,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:38,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:38,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:38,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:38,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:38,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:38,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:38,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:38,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:38,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:38,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:20:38,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896643242] [2020-10-13 23:20:38,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:38,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-13 23:20:38,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662517546] [2020-10-13 23:20:38,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-13 23:20:38,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:38,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-13 23:20:38,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=2133, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 23:20:38,368 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 50 states. [2020-10-13 23:20:40,461 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-13 23:20:41,760 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-13 23:20:42,047 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-13 23:20:43,112 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 129 [2020-10-13 23:20:45,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:45,718 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2020-10-13 23:20:45,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-13 23:20:45,718 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 64 [2020-10-13 23:20:45,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:45,720 INFO L225 Difference]: With dead ends: 110 [2020-10-13 23:20:45,720 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 23:20:45,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=646, Invalid=5054, Unknown=0, NotChecked=0, Total=5700 [2020-10-13 23:20:45,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 23:20:45,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2020-10-13 23:20:45,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 23:20:45,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-10-13 23:20:45,736 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 64 [2020-10-13 23:20:45,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:45,736 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-10-13 23:20:45,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-13 23:20:45,737 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-10-13 23:20:45,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:20:45,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:45,737 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:20:45,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:20:45,738 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:45,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:45,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1933485329, now seen corresponding path program 21 times [2020-10-13 23:20:45,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:45,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166906728] [2020-10-13 23:20:45,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:45,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:45,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:49,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:49,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 23:20:49,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:20:49,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4077 [2020-10-13 23:20:49,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:49,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:49,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:20:49,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 23:20:49,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:20:49,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:50,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:50,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:50,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:50,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:50,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:50,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:20:50,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:50,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:50,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:50,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:50,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:50,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:50,121 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 23:20:50,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166906728] [2020-10-13 23:20:50,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:50,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:20:50,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936331458] [2020-10-13 23:20:50,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:20:50,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:50,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:20:50,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:20:50,123 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 22 states. [2020-10-13 23:20:51,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:51,344 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2020-10-13 23:20:51,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:20:51,345 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 66 [2020-10-13 23:20:51,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:51,346 INFO L225 Difference]: With dead ends: 130 [2020-10-13 23:20:51,346 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 23:20:51,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=393, Invalid=1329, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:20:51,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 23:20:51,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 72. [2020-10-13 23:20:51,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 23:20:51,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-10-13 23:20:51,359 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 66 [2020-10-13 23:20:51,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:51,360 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-10-13 23:20:51,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:20:51,360 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-10-13 23:20:51,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:20:51,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:51,360 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:20:51,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:20:51,360 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:51,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:51,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1060578513, now seen corresponding path program 22 times [2020-10-13 23:20:51,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:51,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644668009] [2020-10-13 23:20:51,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:51,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:51,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:56,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:56,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 23:20:56,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:20:56,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:20:56,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:56,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:56,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:20:56,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:56,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 23:20:56,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:56,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:56,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:56,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:56,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:56,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:56,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:56,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:56,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:56,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:56,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:56,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:56,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 23:20:56,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644668009] [2020-10-13 23:20:56,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:56,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:20:56,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758522306] [2020-10-13 23:20:56,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:20:56,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:56,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:20:56,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:20:56,657 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 22 states. [2020-10-13 23:20:57,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:57,275 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2020-10-13 23:20:57,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:20:57,276 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 66 [2020-10-13 23:20:57,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:57,277 INFO L225 Difference]: With dead ends: 137 [2020-10-13 23:20:57,277 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 23:20:57,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:20:57,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 23:20:57,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2020-10-13 23:20:57,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 23:20:57,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-13 23:20:57,292 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 66 [2020-10-13 23:20:57,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:57,292 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-13 23:20:57,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:20:57,292 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-13 23:20:57,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 23:20:57,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:57,293 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:20:57,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:20:57,293 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:57,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:57,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1060899251, now seen corresponding path program 23 times [2020-10-13 23:20:57,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:57,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666863381] [2020-10-13 23:20:57,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:57,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:57,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:58,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:59,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:59,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:00,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:00,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:02,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:02,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 23:21:02,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:21:02,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:21:02,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:02,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:02,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 23:21:02,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:21:02,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 23:21:02,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:05,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:21:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:05,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:05,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:05,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:21:05,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:21:05,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:21:05,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:05,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:05,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:21:05,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:21:05,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:21:05,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 23:21:05,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666863381] [2020-10-13 23:21:05,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:21:05,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 23:21:05,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800037658] [2020-10-13 23:21:05,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 23:21:05,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:21:05,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 23:21:05,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1637, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:21:05,988 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 42 states. [2020-10-13 23:21:08,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:21:08,339 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2020-10-13 23:21:08,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 23:21:08,340 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 70 [2020-10-13 23:21:08,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:21:08,341 INFO L225 Difference]: With dead ends: 98 [2020-10-13 23:21:08,342 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 23:21:08,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=99, Invalid=1881, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 23:21:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 23:21:08,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2020-10-13 23:21:08,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 23:21:08,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-10-13 23:21:08,360 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 70 [2020-10-13 23:21:08,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:21:08,360 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-10-13 23:21:08,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 23:21:08,360 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-10-13 23:21:08,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 23:21:08,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:21:08,361 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:21:08,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:21:08,362 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:21:08,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:21:08,362 INFO L82 PathProgramCache]: Analyzing trace with hash 741234603, now seen corresponding path program 24 times [2020-10-13 23:21:08,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:21:08,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321753630] [2020-10-13 23:21:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:21:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:08,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:08,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:13,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:13,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 23:21:13,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:21:13,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:21:13,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:13,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:13,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:21:13,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 23:21:13,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:21:13,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:13,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:21:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:13,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:13,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:13,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:21:13,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:21:13,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:21:13,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:13,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:13,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:21:13,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:21:13,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:21:13,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 23:21:13,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321753630] [2020-10-13 23:21:13,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:21:13,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:21:13,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047773267] [2020-10-13 23:21:13,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:21:13,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:21:13,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:21:13,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:21:13,731 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 24 states. [2020-10-13 23:21:15,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:21:15,318 INFO L93 Difference]: Finished difference Result 144 states and 150 transitions. [2020-10-13 23:21:15,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 23:21:15,320 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 72 [2020-10-13 23:21:15,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:21:15,322 INFO L225 Difference]: With dead ends: 144 [2020-10-13 23:21:15,322 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 23:21:15,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=470, Invalid=1600, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 23:21:15,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 23:21:15,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 78. [2020-10-13 23:21:15,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 23:21:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2020-10-13 23:21:15,336 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 72 [2020-10-13 23:21:15,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:21:15,337 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2020-10-13 23:21:15,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:21:15,337 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2020-10-13 23:21:15,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 23:21:15,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:21:15,338 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:21:15,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:21:15,338 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:21:15,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:21:15,339 INFO L82 PathProgramCache]: Analyzing trace with hash -603592853, now seen corresponding path program 25 times [2020-10-13 23:21:15,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:21:15,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100189143] [2020-10-13 23:21:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:21:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:15,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:15,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:20,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:20,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 23:21:20,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:21:20,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:21:20,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:20,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:20,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:21:20,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:21:20,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 23:21:20,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:20,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:21:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:20,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:20,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:20,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:21:20,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:21:20,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:21:20,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:20,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:20,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:21:20,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:21:20,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:21:20,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 23:21:20,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100189143] [2020-10-13 23:21:20,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:21:20,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:21:20,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236293696] [2020-10-13 23:21:20,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:21:20,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:21:20,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:21:20,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:21:20,726 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 24 states. [2020-10-13 23:21:21,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:21:21,517 INFO L93 Difference]: Finished difference Result 149 states and 154 transitions. [2020-10-13 23:21:21,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:21:21,518 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 72 [2020-10-13 23:21:21,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:21:21,519 INFO L225 Difference]: With dead ends: 149 [2020-10-13 23:21:21,519 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 23:21:21,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:21:21,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 23:21:21,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-10-13 23:21:21,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 23:21:21,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-13 23:21:21,538 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 72 [2020-10-13 23:21:21,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:21:21,538 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-13 23:21:21,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:21:21,538 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-13 23:21:21,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 23:21:21,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:21:21,539 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:21:21,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:21:21,540 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:21:21,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:21:21,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1631085593, now seen corresponding path program 26 times [2020-10-13 23:21:21,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:21:21,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473616249] [2020-10-13 23:21:21,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:21:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:21,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:22,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:23,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:23,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:24,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:25,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:26,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:26,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:26,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 23:21:26,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:21:26,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:21:26,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:26,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:26,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 23:21:26,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:21:26,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 23:21:26,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:28,123 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-13 23:21:28,378 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-13 23:21:32,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:21:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:32,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:32,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:32,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:21:32,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:21:32,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:21:32,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:32,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:32,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:21:32,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:21:32,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:21:32,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:21:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 23:21:32,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473616249] [2020-10-13 23:21:32,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:21:32,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 23:21:32,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146861171] [2020-10-13 23:21:32,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 23:21:32,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:21:32,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 23:21:32,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2150, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 23:21:32,366 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 48 states. [2020-10-13 23:21:32,830 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-13 23:21:33,910 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-13 23:21:34,715 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-10-13 23:21:39,268 WARN L193 SmtUtils]: Spent 935.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 133 [2020-10-13 23:21:44,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:21:44,848 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2020-10-13 23:21:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-13 23:21:44,850 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 76 [2020-10-13 23:21:44,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:21:44,852 INFO L225 Difference]: With dead ends: 107 [2020-10-13 23:21:44,852 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 23:21:44,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=308, Invalid=5392, Unknown=0, NotChecked=0, Total=5700 [2020-10-13 23:21:44,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 23:21:44,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 82. [2020-10-13 23:21:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:21:44,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-10-13 23:21:44,876 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 76 [2020-10-13 23:21:44,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:21:44,877 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-10-13 23:21:44,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 23:21:44,877 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-10-13 23:21:44,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 23:21:44,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:21:44,878 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:21:44,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:21:44,879 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:21:44,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:21:44,879 INFO L82 PathProgramCache]: Analyzing trace with hash 797175493, now seen corresponding path program 27 times [2020-10-13 23:21:44,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:21:44,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397109726] [2020-10-13 23:21:44,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:21:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:44,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:45,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:49,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:49,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 23:21:49,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:21:49,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:21:49,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:49,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:49,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:21:49,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 23:21:49,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:21:49,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:50,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:21:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:50,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:50,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:50,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:21:50,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:21:50,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:21:50,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:50,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:50,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:21:50,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:21:50,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:21:50,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:21:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 23:21:50,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397109726] [2020-10-13 23:21:50,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:21:50,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:21:50,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586431156] [2020-10-13 23:21:50,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:21:50,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:21:50,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:21:50,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:21:50,650 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 26 states. [2020-10-13 23:21:53,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:21:53,624 INFO L93 Difference]: Finished difference Result 156 states and 162 transitions. [2020-10-13 23:21:53,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 23:21:53,625 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 78 [2020-10-13 23:21:53,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:21:53,628 INFO L225 Difference]: With dead ends: 156 [2020-10-13 23:21:53,628 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 23:21:53,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=554, Invalid=1896, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 23:21:53,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 23:21:53,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2020-10-13 23:21:53,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 23:21:53,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2020-10-13 23:21:53,653 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 78 [2020-10-13 23:21:53,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:21:53,654 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2020-10-13 23:21:53,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:21:53,654 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2020-10-13 23:21:53,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 23:21:53,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:21:53,655 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:21:53,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:21:53,655 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:21:53,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:21:53,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1203146373, now seen corresponding path program 28 times [2020-10-13 23:21:53,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:21:53,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818161115] [2020-10-13 23:21:53,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:21:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:53,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:53,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:58,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:58,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 23:21:58,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:21:58,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:21:58,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:58,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:58,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:21:58,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:21:58,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 23:21:58,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:59,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:21:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:59,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:59,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:59,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:21:59,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:21:59,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:21:59,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:59,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:59,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:21:59,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:21:59,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:21:59,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 23:21:59,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818161115] [2020-10-13 23:21:59,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:21:59,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:21:59,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897346884] [2020-10-13 23:21:59,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:21:59,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:21:59,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:21:59,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:21:59,448 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 26 states. [2020-10-13 23:22:01,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:01,044 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2020-10-13 23:22:01,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:22:01,045 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 78 [2020-10-13 23:22:01,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:01,047 INFO L225 Difference]: With dead ends: 161 [2020-10-13 23:22:01,047 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 23:22:01,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=328, Invalid=1078, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:22:01,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 23:22:01,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-10-13 23:22:01,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 23:22:01,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-13 23:22:01,075 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 78 [2020-10-13 23:22:01,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:01,075 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-13 23:22:01,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:22:01,075 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-13 23:22:01,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 23:22:01,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:01,077 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:01,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:22:01,077 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:01,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:01,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1228858881, now seen corresponding path program 29 times [2020-10-13 23:22:01,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:01,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369327748] [2020-10-13 23:22:01,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:01,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:01,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:02,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:03,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:04,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:05,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:06,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:06,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 23:22:06,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:22:06,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5191 [2020-10-13 23:22:06,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:06,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:06,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-13 23:22:06,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:22:06,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 23:22:06,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:22:07,404 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-10-13 23:22:07,595 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-10-13 23:22:07,964 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-13 23:22:08,374 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-10-13 23:22:08,593 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-10-13 23:22:08,821 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-10-13 23:22:09,258 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-10-13 23:22:09,733 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-10-13 23:22:10,491 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-10-13 23:22:11,244 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-13 23:22:11,593 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-13 23:22:11,866 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-13 23:22:15,689 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-10-13 23:22:16,040 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-10-13 23:22:16,444 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2020-10-13 23:22:16,824 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-10-13 23:22:17,928 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-10-13 23:22:19,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:19,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:19,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:19,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:19,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:19,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:22:19,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:19,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:19,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:19,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:19,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:19,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:22:19,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369327748] [2020-10-13 23:22:19,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:22:19,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-13 23:22:19,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111598637] [2020-10-13 23:22:19,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-13 23:22:19,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:19,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-13 23:22:19,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=3768, Unknown=0, NotChecked=0, Total=4160 [2020-10-13 23:22:19,851 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 65 states. [2020-10-13 23:22:25,890 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 12 [2020-10-13 23:22:27,907 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2020-10-13 23:22:32,086 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 90 [2020-10-13 23:22:33,232 WARN L193 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2020-10-13 23:22:34,011 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-10-13 23:22:34,927 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-13 23:22:36,403 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 121 DAG size of output: 107 [2020-10-13 23:22:37,206 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2020-10-13 23:22:38,180 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-13 23:22:39,114 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-10-13 23:22:39,689 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-13 23:22:40,237 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-10-13 23:22:40,885 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-13 23:22:41,626 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-13 23:22:42,315 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-10-13 23:22:43,000 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77