/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/vnew1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 00:07:35,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 00:07:35,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 00:07:35,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 00:07:35,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 00:07:35,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 00:07:35,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 00:07:35,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 00:07:35,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 00:07:35,319 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 00:07:35,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 00:07:35,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 00:07:35,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 00:07:35,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 00:07:35,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 00:07:35,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 00:07:35,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 00:07:35,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 00:07:35,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 00:07:35,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 00:07:35,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 00:07:35,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 00:07:35,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 00:07:35,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 00:07:35,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 00:07:35,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 00:07:35,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 00:07:35,338 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 00:07:35,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 00:07:35,339 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 00:07:35,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 00:07:35,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 00:07:35,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 00:07:35,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 00:07:35,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 00:07:35,343 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 00:07:35,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 00:07:35,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 00:07:35,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 00:07:35,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 00:07:35,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 00:07:35,346 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 [2020-10-15 00:07:35,370 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 00:07:35,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 00:07:35,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 00:07:35,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 00:07:35,372 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 00:07:35,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 00:07:35,373 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 00:07:35,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 00:07:35,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 00:07:35,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 00:07:35,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 00:07:35,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 00:07:35,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 00:07:35,374 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 00:07:35,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 00:07:35,374 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 00:07:35,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 00:07:35,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 00:07:35,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 00:07:35,375 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 00:07:35,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 00:07:35,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:07:35,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 00:07:35,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 00:07:35,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 00:07:35,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 00:07:35,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 00:07:35,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 00:07:35,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 00:07:35,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 00:07:35,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 00:07:35,761 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 00:07:35,764 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 00:07:35,766 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 00:07:35,766 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 00:07:35,767 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/vnew1.c [2020-10-15 00:07:35,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e0bb31d8/5d549d25002a4c9c9de374c79b33efe7/FLAG0c0c22ba1 [2020-10-15 00:07:36,269 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 00:07:36,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/vnew1.c [2020-10-15 00:07:36,276 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e0bb31d8/5d549d25002a4c9c9de374c79b33efe7/FLAG0c0c22ba1 [2020-10-15 00:07:36,656 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e0bb31d8/5d549d25002a4c9c9de374c79b33efe7 [2020-10-15 00:07:36,666 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 00:07:36,668 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 00:07:36,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 00:07:36,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 00:07:36,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 00:07:36,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:36" (1/1) ... [2020-10-15 00:07:36,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@709958c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36, skipping insertion in model container [2020-10-15 00:07:36,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:36" (1/1) ... [2020-10-15 00:07:36,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 00:07:36,708 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 00:07:36,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:07:36,882 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 00:07:36,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:07:36,916 INFO L208 MainTranslator]: Completed translation [2020-10-15 00:07:36,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36 WrapperNode [2020-10-15 00:07:36,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 00:07:36,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 00:07:36,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 00:07:36,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 00:07:36,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36" (1/1) ... [2020-10-15 00:07:36,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36" (1/1) ... [2020-10-15 00:07:37,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36" (1/1) ... [2020-10-15 00:07:37,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36" (1/1) ... [2020-10-15 00:07:37,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36" (1/1) ... [2020-10-15 00:07:37,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36" (1/1) ... [2020-10-15 00:07:37,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36" (1/1) ... [2020-10-15 00:07:37,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 00:07:37,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 00:07:37,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 00:07:37,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 00:07:37,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36" (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 [2020-10-15 00:07:37,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 00:07:37,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 00:07:37,135 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-15 00:07:37,136 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-15 00:07:37,136 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 00:07:37,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 00:07:37,136 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-15 00:07:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-15 00:07:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-15 00:07:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-15 00:07:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 00:07:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 00:07:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 00:07:37,572 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 00:07:37,572 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-15 00:07:37,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:37 BoogieIcfgContainer [2020-10-15 00:07:37,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 00:07:37,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 00:07:37,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 00:07:37,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 00:07:37,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:07:36" (1/3) ... [2020-10-15 00:07:37,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12723ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:37, skipping insertion in model container [2020-10-15 00:07:37,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:36" (2/3) ... [2020-10-15 00:07:37,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12723ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:37, skipping insertion in model container [2020-10-15 00:07:37,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:37" (3/3) ... [2020-10-15 00:07:37,584 INFO L109 eAbstractionObserver]: Analyzing ICFG vnew1.c [2020-10-15 00:07:37,595 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 00:07:37,603 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 00:07:37,617 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 00:07:37,646 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 00:07:37,646 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 00:07:37,646 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 00:07:37,646 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 00:07:37,647 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 00:07:37,647 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 00:07:37,647 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 00:07:37,647 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 00:07:37,672 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-15 00:07:37,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 00:07:37,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:37,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:37,683 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:37,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:37,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1204847531, now seen corresponding path program 1 times [2020-10-15 00:07:37,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:37,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773554613] [2020-10-15 00:07:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:37,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:38,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:38,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:38,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-15 00:07:38,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:07:38,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 486 [2020-10-15 00:07:38,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:38,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:38,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 00:07:38,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:07:38,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-15 00:07:38,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 00:07:38,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:38,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:38,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:38,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:07:38,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:38,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:07:38,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:38,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:38,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:38,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:38,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:38,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:07:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:38,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773554613] [2020-10-15 00:07:38,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:07:38,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 00:07:38,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422498440] [2020-10-15 00:07:38,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 00:07:38,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:38,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 00:07:38,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:07:38,605 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 7 states. [2020-10-15 00:07:38,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:38,840 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-10-15 00:07:38,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 00:07:38,843 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-15 00:07:38,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:38,854 INFO L225 Difference]: With dead ends: 50 [2020-10-15 00:07:38,855 INFO L226 Difference]: Without dead ends: 27 [2020-10-15 00:07:38,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:07:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-15 00:07:38,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-15 00:07:38,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-15 00:07:38,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-15 00:07:38,901 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2020-10-15 00:07:38,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:38,902 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-15 00:07:38,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 00:07:38,902 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-15 00:07:38,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 00:07:38,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:38,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:38,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 00:07:38,904 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:38,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:38,905 INFO L82 PathProgramCache]: Analyzing trace with hash -813428583, now seen corresponding path program 1 times [2020-10-15 00:07:38,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:38,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802667673] [2020-10-15 00:07:38,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:38,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:39,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:39,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-15 00:07:39,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:39,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-15 00:07:39,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:39,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:39,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:07:39,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:07:39,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-15 00:07:39,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:07:39,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:39,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:39,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:39,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:07:39,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:39,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:07:39,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:39,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:39,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:39,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:39,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:39,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:07:39,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:39,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802667673] [2020-10-15 00:07:39,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:39,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:07:39,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008327693] [2020-10-15 00:07:39,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:07:39,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:39,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:07:39,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:07:39,392 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2020-10-15 00:07:39,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:39,633 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-15 00:07:39,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:07:39,634 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-15 00:07:39,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:39,636 INFO L225 Difference]: With dead ends: 38 [2020-10-15 00:07:39,636 INFO L226 Difference]: Without dead ends: 36 [2020-10-15 00:07:39,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:07:39,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-15 00:07:39,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-15 00:07:39,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-15 00:07:39,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-15 00:07:39,647 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 15 [2020-10-15 00:07:39,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:39,648 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-15 00:07:39,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:07:39,648 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-15 00:07:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 00:07:39,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:39,650 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:39,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 00:07:39,650 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:39,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:39,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1564343083, now seen corresponding path program 2 times [2020-10-15 00:07:39,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:39,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367310832] [2020-10-15 00:07:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:39,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:39,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:39,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-15 00:07:39,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:39,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-15 00:07:39,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:39,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:39,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:07:39,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:07:39,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-15 00:07:39,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:07:39,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:39,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:39,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:39,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:07:39,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:39,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:07:39,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:39,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:39,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:39,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:39,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:39,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:07:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:39,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367310832] [2020-10-15 00:07:39,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:39,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:07:39,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579392690] [2020-10-15 00:07:39,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:07:39,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:39,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:07:39,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:07:39,931 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 8 states. [2020-10-15 00:07:40,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:40,216 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-10-15 00:07:40,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:07:40,217 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-15 00:07:40,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:40,221 INFO L225 Difference]: With dead ends: 53 [2020-10-15 00:07:40,221 INFO L226 Difference]: Without dead ends: 51 [2020-10-15 00:07:40,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:07:40,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-15 00:07:40,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2020-10-15 00:07:40,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-15 00:07:40,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-15 00:07:40,232 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 16 [2020-10-15 00:07:40,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:40,233 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-15 00:07:40,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:07:40,233 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-15 00:07:40,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 00:07:40,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:40,234 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:40,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 00:07:40,235 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:40,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:40,236 INFO L82 PathProgramCache]: Analyzing trace with hash 927111193, now seen corresponding path program 3 times [2020-10-15 00:07:40,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:40,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406115593] [2020-10-15 00:07:40,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:40,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:40,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:40,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-15 00:07:40,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:40,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-15 00:07:40,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:40,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:40,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:07:40,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:07:40,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-15 00:07:40,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:07:40,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:40,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:40,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:40,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:07:40,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:40,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:07:40,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:40,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:40,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:40,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:40,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:40,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:07:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:40,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406115593] [2020-10-15 00:07:40,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:40,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:07:40,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648445572] [2020-10-15 00:07:40,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:07:40,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:40,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:07:40,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:07:40,547 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2020-10-15 00:07:42,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:42,991 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-10-15 00:07:42,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:07:42,997 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-15 00:07:42,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:43,002 INFO L225 Difference]: With dead ends: 54 [2020-10-15 00:07:43,002 INFO L226 Difference]: Without dead ends: 52 [2020-10-15 00:07:43,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:07:43,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-15 00:07:43,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2020-10-15 00:07:43,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-15 00:07:43,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-15 00:07:43,023 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 17 [2020-10-15 00:07:43,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:43,024 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-15 00:07:43,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:07:43,024 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-15 00:07:43,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-15 00:07:43,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:43,025 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:43,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 00:07:43,025 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:43,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:43,026 INFO L82 PathProgramCache]: Analyzing trace with hash 852782421, now seen corresponding path program 4 times [2020-10-15 00:07:43,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:43,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106937462] [2020-10-15 00:07:43,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:43,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:43,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:43,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-15 00:07:43,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:43,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-15 00:07:43,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:43,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:43,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:07:43,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:07:43,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-15 00:07:43,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:07:43,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:43,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:43,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:43,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:07:43,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:43,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:07:43,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:43,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:43,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:43,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:43,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:43,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:07:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:43,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106937462] [2020-10-15 00:07:43,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:43,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:07:43,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324728803] [2020-10-15 00:07:43,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:07:43,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:43,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:07:43,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:07:43,563 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 10 states. [2020-10-15 00:07:44,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:44,077 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2020-10-15 00:07:44,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 00:07:44,078 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-15 00:07:44,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:44,079 INFO L225 Difference]: With dead ends: 57 [2020-10-15 00:07:44,079 INFO L226 Difference]: Without dead ends: 55 [2020-10-15 00:07:44,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:07:44,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-15 00:07:44,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2020-10-15 00:07:44,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-15 00:07:44,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-15 00:07:44,094 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 18 [2020-10-15 00:07:44,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:44,094 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-15 00:07:44,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:07:44,094 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-15 00:07:44,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 00:07:44,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:44,095 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:44,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 00:07:44,096 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:44,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:44,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1451409511, now seen corresponding path program 5 times [2020-10-15 00:07:44,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:44,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832382229] [2020-10-15 00:07:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:44,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:44,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:44,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-15 00:07:44,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:44,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-15 00:07:44,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:44,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:44,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:07:44,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:07:44,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-15 00:07:44,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:07:44,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:44,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:44,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:44,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:07:44,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:44,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:07:44,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:44,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:44,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:44,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:44,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:44,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:07:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:44,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832382229] [2020-10-15 00:07:44,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:44,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 00:07:44,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110818156] [2020-10-15 00:07:44,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 00:07:44,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:44,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 00:07:44,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:07:44,670 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 11 states. [2020-10-15 00:07:49,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:49,352 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2020-10-15 00:07:49,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 00:07:49,354 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-15 00:07:49,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:49,356 INFO L225 Difference]: With dead ends: 64 [2020-10-15 00:07:49,356 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 00:07:49,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:07:49,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 00:07:49,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 39. [2020-10-15 00:07:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-15 00:07:49,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-15 00:07:49,368 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 19 [2020-10-15 00:07:49,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:49,369 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-15 00:07:49,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 00:07:49,369 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-15 00:07:49,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 00:07:49,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:49,370 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:49,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 00:07:49,370 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:49,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:49,370 INFO L82 PathProgramCache]: Analyzing trace with hash 133084629, now seen corresponding path program 6 times [2020-10-15 00:07:49,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:49,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861227593] [2020-10-15 00:07:49,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:49,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:49,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:49,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-15 00:07:49,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:49,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-15 00:07:49,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:49,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:49,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:07:49,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:07:49,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 00:07:49,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:07:49,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:49,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:49,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:49,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:07:49,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:49,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:07:49,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:49,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:49,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:49,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:49,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:49,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:07:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:49,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861227593] [2020-10-15 00:07:49,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:49,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:07:49,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774850565] [2020-10-15 00:07:49,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:07:49,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:49,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:07:49,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:07:49,912 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 12 states. [2020-10-15 00:07:55,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:55,237 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2020-10-15 00:07:55,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 00:07:55,238 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-15 00:07:55,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:55,239 INFO L225 Difference]: With dead ends: 75 [2020-10-15 00:07:55,239 INFO L226 Difference]: Without dead ends: 73 [2020-10-15 00:07:55,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:07:55,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-15 00:07:55,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-10-15 00:07:55,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 00:07:55,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-10-15 00:07:55,259 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 20 [2020-10-15 00:07:55,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:55,259 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-10-15 00:07:55,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:07:55,260 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-10-15 00:07:55,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 00:07:55,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:55,262 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:55,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 00:07:55,262 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:55,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:55,263 INFO L82 PathProgramCache]: Analyzing trace with hash -704934537, now seen corresponding path program 1 times [2020-10-15 00:07:55,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:55,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447631331] [2020-10-15 00:07:55,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:55,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:55,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:55,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:55,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:55,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:55,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-15 00:07:55,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:07:55,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 617 [2020-10-15 00:07:55,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:55,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:55,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:07:55,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:07:55,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-15 00:07:55,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:56,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:56,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:56,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:56,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:07:56,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:56,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:07:56,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:56,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:56,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:56,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:56,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:56,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:56,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-15 00:07:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:56,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:56,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:56,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:07:56,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:56,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:07:56,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:56,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:56,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:07:56,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:56,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:07:56,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:56,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:56,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447631331] [2020-10-15 00:07:56,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:56,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:07:56,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451593940] [2020-10-15 00:07:56,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:07:56,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:56,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:07:56,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:07:56,117 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 9 states. [2020-10-15 00:07:56,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:07:56,418 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-10-15 00:07:56,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 00:07:56,419 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-15 00:07:56,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:07:56,420 INFO L225 Difference]: With dead ends: 78 [2020-10-15 00:07:56,420 INFO L226 Difference]: Without dead ends: 76 [2020-10-15 00:07:56,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:07:56,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-15 00:07:56,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2020-10-15 00:07:56,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 00:07:56,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2020-10-15 00:07:56,443 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 22 [2020-10-15 00:07:56,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:07:56,446 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2020-10-15 00:07:56,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:07:56,446 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2020-10-15 00:07:56,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 00:07:56,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:07:56,447 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:07:56,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 00:07:56,448 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:07:56,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:07:56,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2007762713, now seen corresponding path program 7 times [2020-10-15 00:07:56,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:07:56,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354947162] [2020-10-15 00:07:56,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:07:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:56,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:56,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:56,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-15 00:07:56,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:56,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-15 00:07:56,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:56,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:56,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 00:07:56,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:07:56,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 00:07:56,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:07:57,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:07:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:07:57,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:07:57,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:07:57,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:07:57,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:07:57,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:07:57,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:07:57,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:07:57,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:07:57,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:07:57,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:07:57,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:07:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:07:57,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354947162] [2020-10-15 00:07:57,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:07:57,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:07:57,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630225385] [2020-10-15 00:07:57,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:07:57,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:07:57,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:07:57,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:07:57,076 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 13 states. [2020-10-15 00:08:00,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:00,034 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2020-10-15 00:08:00,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:08:00,035 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-15 00:08:00,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:00,037 INFO L225 Difference]: With dead ends: 94 [2020-10-15 00:08:00,037 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 00:08:00,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:08:00,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 00:08:00,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 70. [2020-10-15 00:08:00,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 00:08:00,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-10-15 00:08:00,056 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 21 [2020-10-15 00:08:00,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:00,056 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-10-15 00:08:00,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:08:00,057 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-10-15 00:08:00,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 00:08:00,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:00,058 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:00,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 00:08:00,058 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:00,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:00,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1269407163, now seen corresponding path program 2 times [2020-10-15 00:08:00,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:00,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908169737] [2020-10-15 00:08:00,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:00,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:00,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:00,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-15 00:08:00,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:00,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-15 00:08:00,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:00,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:00,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:08:00,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:08:00,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-15 00:08:00,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:00,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:00,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:00,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:00,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:08:00,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:00,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:08:00,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:00,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:00,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:00,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:00,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:00,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:00,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-15 00:08:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:00,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:00,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:00,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:08:00,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:00,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-15 00:08:00,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:00,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:00,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:08:00,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:00,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:08:00,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:00,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908169737] [2020-10-15 00:08:00,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:08:00,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:08:00,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666144842] [2020-10-15 00:08:00,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:08:00,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:00,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:08:00,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:08:00,380 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 9 states. [2020-10-15 00:08:00,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:00,682 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2020-10-15 00:08:00,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 00:08:00,683 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-15 00:08:00,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:00,684 INFO L225 Difference]: With dead ends: 90 [2020-10-15 00:08:00,684 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 00:08:00,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:08:00,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 00:08:00,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-10-15 00:08:00,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-15 00:08:00,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2020-10-15 00:08:00,717 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 23 [2020-10-15 00:08:00,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:00,717 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2020-10-15 00:08:00,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:08:00,717 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2020-10-15 00:08:00,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 00:08:00,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:00,723 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:00,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 00:08:00,723 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:00,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:00,724 INFO L82 PathProgramCache]: Analyzing trace with hash -6758827, now seen corresponding path program 8 times [2020-10-15 00:08:00,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:00,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787914840] [2020-10-15 00:08:00,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:00,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:01,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:01,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-15 00:08:01,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:01,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-15 00:08:01,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:01,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:01,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:08:01,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:08:01,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-15 00:08:01,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:08:01,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:01,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:01,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:01,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:01,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:08:01,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:01,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:08:01,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:01,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:01,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:01,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:01,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:01,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:01,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787914840] [2020-10-15 00:08:01,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:08:01,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:08:01,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490784037] [2020-10-15 00:08:01,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:08:01,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:01,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:08:01,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:08:01,339 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand 14 states. [2020-10-15 00:08:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:06,488 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2020-10-15 00:08:06,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 00:08:06,489 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-15 00:08:06,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:06,491 INFO L225 Difference]: With dead ends: 109 [2020-10-15 00:08:06,491 INFO L226 Difference]: Without dead ends: 107 [2020-10-15 00:08:06,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:08:06,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-15 00:08:06,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2020-10-15 00:08:06,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-15 00:08:06,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2020-10-15 00:08:06,509 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 22 [2020-10-15 00:08:06,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:06,509 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2020-10-15 00:08:06,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:08:06,510 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2020-10-15 00:08:06,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 00:08:06,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:06,511 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:06,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 00:08:06,511 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:06,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:06,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1967582873, now seen corresponding path program 9 times [2020-10-15 00:08:06,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:06,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722175100] [2020-10-15 00:08:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:06,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:06,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:06,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-15 00:08:06,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:06,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-15 00:08:06,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:06,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:06,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:08:06,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:08:06,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-15 00:08:06,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:07,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:07,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:07,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:07,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:08:07,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:07,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 00:08:07,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:07,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:07,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:07,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:07,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:07,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 00:08:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:07,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722175100] [2020-10-15 00:08:07,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:08:07,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:08:07,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400205499] [2020-10-15 00:08:07,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:08:07,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:07,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:08:07,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:08:07,320 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand 15 states. [2020-10-15 00:08:14,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:14,691 INFO L93 Difference]: Finished difference Result 114 states and 132 transitions. [2020-10-15 00:08:14,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 00:08:14,692 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-15 00:08:14,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:14,693 INFO L225 Difference]: With dead ends: 114 [2020-10-15 00:08:14,693 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 00:08:14,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:08:14,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 00:08:14,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 87. [2020-10-15 00:08:14,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 00:08:14,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2020-10-15 00:08:14,709 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 23 [2020-10-15 00:08:14,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:14,710 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2020-10-15 00:08:14,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:08:14,710 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2020-10-15 00:08:14,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 00:08:14,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:14,711 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:14,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 00:08:14,711 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:14,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:14,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1252333867, now seen corresponding path program 10 times [2020-10-15 00:08:14,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:14,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021214949] [2020-10-15 00:08:14,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:14,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:15,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:15,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-15 00:08:15,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:15,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-15 00:08:15,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:15,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:15,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:08:15,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:08:15,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-15 00:08:15,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:08:15,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:15,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:15,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:15,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:08:15,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:15,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:08:15,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:15,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:15,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:15,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:15,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:15,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:15,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021214949] [2020-10-15 00:08:15,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:08:15,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:08:15,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689596148] [2020-10-15 00:08:15,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:08:15,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:15,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:08:15,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:08:15,453 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand 16 states. [2020-10-15 00:08:20,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:20,827 INFO L93 Difference]: Finished difference Result 129 states and 148 transitions. [2020-10-15 00:08:20,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 00:08:20,828 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-15 00:08:20,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:20,829 INFO L225 Difference]: With dead ends: 129 [2020-10-15 00:08:20,830 INFO L226 Difference]: Without dead ends: 127 [2020-10-15 00:08:20,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2020-10-15 00:08:20,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-15 00:08:20,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 97. [2020-10-15 00:08:20,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 00:08:20,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2020-10-15 00:08:20,860 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 24 [2020-10-15 00:08:20,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:20,861 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2020-10-15 00:08:20,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:08:20,861 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2020-10-15 00:08:20,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 00:08:20,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:20,862 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:20,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 00:08:20,862 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:20,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:20,863 INFO L82 PathProgramCache]: Analyzing trace with hash 2009462297, now seen corresponding path program 11 times [2020-10-15 00:08:20,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:20,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207608727] [2020-10-15 00:08:20,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:20,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:21,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:21,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-15 00:08:21,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:21,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 536 [2020-10-15 00:08:21,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:21,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:21,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-15 00:08:21,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:08:21,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-15 00:08:21,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:22,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:22,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:22,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:22,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:08:22,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:22,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:08:22,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:22,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:22,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:22,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:22,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:22,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:22,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207608727] [2020-10-15 00:08:22,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:08:22,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 00:08:22,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962507357] [2020-10-15 00:08:22,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 00:08:22,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:22,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 00:08:22,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:08:22,105 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand 17 states. [2020-10-15 00:08:37,257 WARN L193 SmtUtils]: Spent 6.24 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-15 00:08:44,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:44,346 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2020-10-15 00:08:44,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 00:08:44,347 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-15 00:08:44,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:44,349 INFO L225 Difference]: With dead ends: 138 [2020-10-15 00:08:44,349 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 00:08:44,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2020-10-15 00:08:44,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 00:08:44,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2020-10-15 00:08:44,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-15 00:08:44,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2020-10-15 00:08:44,377 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 25 [2020-10-15 00:08:44,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:44,378 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2020-10-15 00:08:44,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 00:08:44,378 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2020-10-15 00:08:44,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 00:08:44,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:44,379 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:44,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 00:08:44,379 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:44,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:44,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1392259909, now seen corresponding path program 3 times [2020-10-15 00:08:44,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:44,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429975533] [2020-10-15 00:08:44,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:44,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:44,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:44,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-15 00:08:44,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:44,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-15 00:08:44,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:44,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:44,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 00:08:44,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:08:44,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-15 00:08:44,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:44,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:44,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:44,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:44,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:08:44,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:44,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:08:44,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:44,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:44,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:44,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:44,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:44,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:08:44,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-15 00:08:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:44,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:44,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:44,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:08:44,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:44,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:08:44,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:44,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:44,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:08:44,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:44,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:08:44,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:44,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429975533] [2020-10-15 00:08:44,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:08:44,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:08:44,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627995269] [2020-10-15 00:08:44,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:08:44,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:44,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:08:44,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:08:44,948 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand 13 states. [2020-10-15 00:08:49,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:08:49,950 INFO L93 Difference]: Finished difference Result 136 states and 156 transitions. [2020-10-15 00:08:49,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:08:49,953 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-15 00:08:49,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:08:49,954 INFO L225 Difference]: With dead ends: 136 [2020-10-15 00:08:49,954 INFO L226 Difference]: Without dead ends: 134 [2020-10-15 00:08:49,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:08:49,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-15 00:08:49,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 112. [2020-10-15 00:08:49,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-15 00:08:49,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 130 transitions. [2020-10-15 00:08:49,974 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 130 transitions. Word has length 27 [2020-10-15 00:08:49,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:08:49,974 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 130 transitions. [2020-10-15 00:08:49,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:08:49,974 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 130 transitions. [2020-10-15 00:08:49,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 00:08:49,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:08:49,976 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:08:49,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 00:08:49,976 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:08:49,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:08:49,976 INFO L82 PathProgramCache]: Analyzing trace with hash 45928277, now seen corresponding path program 12 times [2020-10-15 00:08:49,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:08:49,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792652344] [2020-10-15 00:08:49,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:08:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:50,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:50,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:50,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-15 00:08:50,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:50,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 626 [2020-10-15 00:08:50,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:50,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:50,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:08:50,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:08:50,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-15 00:08:50,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:08:51,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:08:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:08:51,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:08:51,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:08:51,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:08:51,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:08:51,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:08:51,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:08:51,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:08:51,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:08:51,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:08:51,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:08:51,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:08:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:08:51,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792652344] [2020-10-15 00:08:51,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:08:51,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:08:51,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736426924] [2020-10-15 00:08:51,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:08:51,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:08:51,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:08:51,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:08:51,207 INFO L87 Difference]: Start difference. First operand 112 states and 130 transitions. Second operand 18 states. [2020-10-15 00:09:20,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:20,232 INFO L93 Difference]: Finished difference Result 153 states and 181 transitions. [2020-10-15 00:09:20,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 00:09:20,232 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-15 00:09:20,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:20,234 INFO L225 Difference]: With dead ends: 153 [2020-10-15 00:09:20,234 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 00:09:20,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 00:09:20,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 00:09:20,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 113. [2020-10-15 00:09:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-15 00:09:20,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 132 transitions. [2020-10-15 00:09:20,255 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 132 transitions. Word has length 26 [2020-10-15 00:09:20,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:20,256 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 132 transitions. [2020-10-15 00:09:20,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:09:20,256 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 132 transitions. [2020-10-15 00:09:20,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 00:09:20,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:20,257 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:20,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 00:09:20,257 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:20,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:20,257 INFO L82 PathProgramCache]: Analyzing trace with hash 312834777, now seen corresponding path program 4 times [2020-10-15 00:09:20,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:20,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051914683] [2020-10-15 00:09:20,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:20,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:20,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:20,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:20,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:20,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:20,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:20,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:20,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:21,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:21,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:21,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:21,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-15 00:09:21,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-15 00:09:21,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1119 [2020-10-15 00:09:21,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:21,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 00:09:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:09:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 00:09:21,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:21,774 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 20 [2020-10-15 00:09:21,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:21,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:21,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:21,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:21,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:21,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:21,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:21,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:21,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:21,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:21,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:21,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:21,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-15 00:09:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:21,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:21,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:21,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:09:21,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:21,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 00:09:21,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:21,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:21,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:09:21,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:21,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:09:21,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:21,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-15 00:09:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:21,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:21,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:21,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:09:21,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:21,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-15 00:09:21,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:21,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:21,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:09:21,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:21,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:09:21,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:21,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-15 00:09:21,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051914683] [2020-10-15 00:09:21,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:21,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:09:21,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461931948] [2020-10-15 00:09:21,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:09:21,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:21,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:09:21,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:09:21,958 INFO L87 Difference]: Start difference. First operand 113 states and 132 transitions. Second operand 8 states. [2020-10-15 00:09:22,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:22,309 INFO L93 Difference]: Finished difference Result 137 states and 156 transitions. [2020-10-15 00:09:22,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:09:22,310 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-15 00:09:22,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:22,311 INFO L225 Difference]: With dead ends: 137 [2020-10-15 00:09:22,311 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 00:09:22,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:09:22,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 00:09:22,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-15 00:09:22,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 00:09:22,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 115 transitions. [2020-10-15 00:09:22,329 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 115 transitions. Word has length 29 [2020-10-15 00:09:22,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:22,329 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 115 transitions. [2020-10-15 00:09:22,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:09:22,329 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 115 transitions. [2020-10-15 00:09:22,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 00:09:22,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:22,330 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:22,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 00:09:22,330 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:22,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:22,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1437157111, now seen corresponding path program 5 times [2020-10-15 00:09:22,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:22,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423714752] [2020-10-15 00:09:22,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:22,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:22,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:22,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-15 00:09:22,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:22,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-15 00:09:22,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:22,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:22,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:09:22,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:09:22,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-15 00:09:22,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:22,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:22,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:22,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:22,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:22,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:22,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:22,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:22,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:22,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:22,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:22,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:22,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:22,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:22,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-15 00:09:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:22,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:22,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:22,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:09:22,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:22,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:09:22,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:22,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:22,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:09:22,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:22,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:09:22,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:22,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423714752] [2020-10-15 00:09:22,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:22,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:09:22,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475303154] [2020-10-15 00:09:22,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:09:22,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:22,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:09:22,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:09:22,915 INFO L87 Difference]: Start difference. First operand 98 states and 115 transitions. Second operand 14 states. [2020-10-15 00:09:32,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:32,016 INFO L93 Difference]: Finished difference Result 126 states and 144 transitions. [2020-10-15 00:09:32,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:09:32,017 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-15 00:09:32,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:32,018 INFO L225 Difference]: With dead ends: 126 [2020-10-15 00:09:32,018 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 00:09:32,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:09:32,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 00:09:32,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 109. [2020-10-15 00:09:32,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-15 00:09:32,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2020-10-15 00:09:32,035 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 28 [2020-10-15 00:09:32,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:32,035 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2020-10-15 00:09:32,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:09:32,035 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2020-10-15 00:09:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 00:09:32,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:32,036 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:32,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-15 00:09:32,036 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:32,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:32,037 INFO L82 PathProgramCache]: Analyzing trace with hash -694084199, now seen corresponding path program 13 times [2020-10-15 00:09:32,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:32,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426628911] [2020-10-15 00:09:32,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:32,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:32,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:32,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-15 00:09:32,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:32,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 725 [2020-10-15 00:09:32,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:32,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:32,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:09:32,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:09:32,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 00:09:32,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:33,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:33,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:33,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:33,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:33,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:33,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:33,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:33,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:33,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:33,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:33,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:33,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:33,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426628911] [2020-10-15 00:09:33,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:33,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-15 00:09:33,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918107879] [2020-10-15 00:09:33,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 00:09:33,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:33,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 00:09:33,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:09:33,289 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand 19 states. [2020-10-15 00:09:37,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:37,052 INFO L93 Difference]: Finished difference Result 149 states and 170 transitions. [2020-10-15 00:09:37,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 00:09:37,053 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-15 00:09:37,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:37,055 INFO L225 Difference]: With dead ends: 149 [2020-10-15 00:09:37,055 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 00:09:37,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 00:09:37,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 00:09:37,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 119. [2020-10-15 00:09:37,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 00:09:37,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2020-10-15 00:09:37,080 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 27 [2020-10-15 00:09:37,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:37,080 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2020-10-15 00:09:37,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 00:09:37,080 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2020-10-15 00:09:37,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 00:09:37,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:37,081 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:37,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-15 00:09:37,082 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:37,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:37,082 INFO L82 PathProgramCache]: Analyzing trace with hash 668292629, now seen corresponding path program 6 times [2020-10-15 00:09:37,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:37,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686621583] [2020-10-15 00:09:37,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:37,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:37,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:37,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:37,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:37,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:38,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:38,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:38,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:38,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:09:38,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 00:09:38,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1589 [2020-10-15 00:09:38,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:38,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:38,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:09:38,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:09:38,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-15 00:09:38,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:39,189 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 23 [2020-10-15 00:09:39,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:39,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:39,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:39,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:39,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:39,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:39,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:39,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:39,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:39,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:39,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:39,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:39,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-15 00:09:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:39,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:39,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:39,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:09:39,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:39,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:09:39,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:39,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:39,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:09:39,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:39,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:09:39,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:39,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-15 00:09:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:39,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:39,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:39,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:09:39,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:39,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:09:39,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:39,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:39,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:09:39,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:39,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:09:39,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:09:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 00:09:39,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686621583] [2020-10-15 00:09:39,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:39,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:09:39,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034940870] [2020-10-15 00:09:39,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:09:39,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:39,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:09:39,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:09:39,241 INFO L87 Difference]: Start difference. First operand 119 states and 137 transitions. Second operand 10 states. [2020-10-15 00:09:39,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:39,590 INFO L93 Difference]: Finished difference Result 136 states and 156 transitions. [2020-10-15 00:09:39,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:09:39,590 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-15 00:09:39,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:39,591 INFO L225 Difference]: With dead ends: 136 [2020-10-15 00:09:39,591 INFO L226 Difference]: Without dead ends: 119 [2020-10-15 00:09:39,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:09:39,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-15 00:09:39,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-10-15 00:09:39,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 00:09:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 136 transitions. [2020-10-15 00:09:39,614 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 136 transitions. Word has length 30 [2020-10-15 00:09:39,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:39,614 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 136 transitions. [2020-10-15 00:09:39,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:09:39,614 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 136 transitions. [2020-10-15 00:09:39,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 00:09:39,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:39,615 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:39,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-15 00:09:39,616 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:39,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:39,616 INFO L82 PathProgramCache]: Analyzing trace with hash 2135332821, now seen corresponding path program 14 times [2020-10-15 00:09:39,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:39,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670403728] [2020-10-15 00:09:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:39,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:40,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:40,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-15 00:09:40,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:40,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 884 [2020-10-15 00:09:40,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:40,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:40,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-15 00:09:40,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:09:40,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 00:09:40,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:41,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:41,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:41,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:41,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:41,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:41,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:41,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:41,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:41,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:41,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:41,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:41,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:41,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670403728] [2020-10-15 00:09:41,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:41,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-15 00:09:41,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591982990] [2020-10-15 00:09:41,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 00:09:41,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:41,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 00:09:41,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:09:41,270 INFO L87 Difference]: Start difference. First operand 119 states and 136 transitions. Second operand 20 states. [2020-10-15 00:09:55,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:09:55,636 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2020-10-15 00:09:55,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 00:09:55,637 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-15 00:09:55,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:09:55,638 INFO L225 Difference]: With dead ends: 155 [2020-10-15 00:09:55,639 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 00:09:55,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=123, Invalid=1283, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 00:09:55,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 00:09:55,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 131. [2020-10-15 00:09:55,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-15 00:09:55,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 150 transitions. [2020-10-15 00:09:55,667 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 150 transitions. Word has length 28 [2020-10-15 00:09:55,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:09:55,667 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 150 transitions. [2020-10-15 00:09:55,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 00:09:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 150 transitions. [2020-10-15 00:09:55,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 00:09:55,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:09:55,668 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:09:55,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-15 00:09:55,669 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:09:55,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:09:55,669 INFO L82 PathProgramCache]: Analyzing trace with hash -347052775, now seen corresponding path program 15 times [2020-10-15 00:09:55,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:09:55,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194600046] [2020-10-15 00:09:55,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:09:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:55,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:56,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:56,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-15 00:09:56,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:56,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 883 [2020-10-15 00:09:56,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:56,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:56,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-15 00:09:56,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:09:56,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-15 00:09:56,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:59,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:09:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:09:59,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:09:59,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:09:59,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:09:59,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:09:59,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:09:59,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:09:59,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:09:59,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:09:59,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:09:59,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:09:59,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:09:59,479 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 119 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:09:59,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194600046] [2020-10-15 00:09:59,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:09:59,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-15 00:09:59,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912785713] [2020-10-15 00:09:59,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 00:09:59,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:09:59,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 00:09:59,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=378, Unknown=1, NotChecked=0, Total=420 [2020-10-15 00:09:59,481 INFO L87 Difference]: Start difference. First operand 131 states and 150 transitions. Second operand 21 states. [2020-10-15 00:10:08,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:08,106 INFO L93 Difference]: Finished difference Result 165 states and 187 transitions. [2020-10-15 00:10:08,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 00:10:08,108 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-15 00:10:08,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:08,110 INFO L225 Difference]: With dead ends: 165 [2020-10-15 00:10:08,110 INFO L226 Difference]: Without dead ends: 163 [2020-10-15 00:10:08,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=121, Invalid=1360, Unknown=1, NotChecked=0, Total=1482 [2020-10-15 00:10:08,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-15 00:10:08,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 139. [2020-10-15 00:10:08,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 00:10:08,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 159 transitions. [2020-10-15 00:10:08,133 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 159 transitions. Word has length 29 [2020-10-15 00:10:08,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:08,134 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 159 transitions. [2020-10-15 00:10:08,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 00:10:08,134 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 159 transitions. [2020-10-15 00:10:08,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 00:10:08,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:08,135 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:08,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-15 00:10:08,135 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:08,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:08,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1095163541, now seen corresponding path program 7 times [2020-10-15 00:10:08,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:08,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021339831] [2020-10-15 00:10:08,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:08,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:08,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:08,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-15 00:10:08,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:08,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-15 00:10:08,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:08,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:08,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:10:08,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:10:08,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-15 00:10:08,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:08,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:08,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:08,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:08,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:08,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:08,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:08,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:08,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:08,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:08,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:08,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:08,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:08,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-15 00:10:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:08,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:08,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:08,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:08,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:08,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:10:08,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:08,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:08,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:08,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:08,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:08,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:08,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-15 00:10:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:08,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:08,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:08,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:08,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:08,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:10:08,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:08,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:08,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:08,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:08,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:08,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 00:10:08,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021339831] [2020-10-15 00:10:08,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:08,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:10:08,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964599554] [2020-10-15 00:10:08,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:10:08,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:08,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:10:08,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:10:08,745 INFO L87 Difference]: Start difference. First operand 139 states and 159 transitions. Second operand 12 states. [2020-10-15 00:10:09,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:09,308 INFO L93 Difference]: Finished difference Result 150 states and 170 transitions. [2020-10-15 00:10:09,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 00:10:09,317 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-15 00:10:09,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:09,318 INFO L225 Difference]: With dead ends: 150 [2020-10-15 00:10:09,318 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 00:10:09,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-10-15 00:10:09,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 00:10:09,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 118. [2020-10-15 00:10:09,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 00:10:09,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 136 transitions. [2020-10-15 00:10:09,343 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 136 transitions. Word has length 32 [2020-10-15 00:10:09,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:09,343 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 136 transitions. [2020-10-15 00:10:09,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:10:09,344 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 136 transitions. [2020-10-15 00:10:09,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 00:10:09,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:09,347 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:09,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-15 00:10:09,347 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:09,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:09,348 INFO L82 PathProgramCache]: Analyzing trace with hash 8405077, now seen corresponding path program 16 times [2020-10-15 00:10:09,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:09,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748841956] [2020-10-15 00:10:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:09,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:10,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:10,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-15 00:10:10,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:10,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 964 [2020-10-15 00:10:10,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:10,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:10,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:10:10,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:10:10,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-15 00:10:10,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:11,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:11,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:11,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:11,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:11,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:11,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:11,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:11,048 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:11,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:11,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:11,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:11,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:11,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748841956] [2020-10-15 00:10:11,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:11,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-15 00:10:11,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760999506] [2020-10-15 00:10:11,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-15 00:10:11,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:11,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-15 00:10:11,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:10:11,055 INFO L87 Difference]: Start difference. First operand 118 states and 136 transitions. Second operand 22 states. [2020-10-15 00:10:15,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:15,524 INFO L93 Difference]: Finished difference Result 156 states and 182 transitions. [2020-10-15 00:10:15,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 00:10:15,525 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-15 00:10:15,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:15,527 INFO L225 Difference]: With dead ends: 156 [2020-10-15 00:10:15,527 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 00:10:15,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 00:10:15,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 00:10:15,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-15 00:10:15,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 00:10:15,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 138 transitions. [2020-10-15 00:10:15,553 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 138 transitions. Word has length 30 [2020-10-15 00:10:15,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:15,553 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 138 transitions. [2020-10-15 00:10:15,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-15 00:10:15,553 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 138 transitions. [2020-10-15 00:10:15,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 00:10:15,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:15,554 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:15,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-15 00:10:15,555 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:15,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:15,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1857303399, now seen corresponding path program 17 times [2020-10-15 00:10:15,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:15,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164178638] [2020-10-15 00:10:15,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:15,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:16,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:16,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-15 00:10:16,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:16,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1116 [2020-10-15 00:10:16,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:16,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:16,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-15 00:10:16,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:10:16,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 00:10:16,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:17,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:17,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:17,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:17,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:17,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:17,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:17,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:17,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:17,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:17,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:17,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:17,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:10:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:17,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164178638] [2020-10-15 00:10:17,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:17,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-15 00:10:17,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509015376] [2020-10-15 00:10:17,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 00:10:17,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:17,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 00:10:17,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:10:17,453 INFO L87 Difference]: Start difference. First operand 119 states and 138 transitions. Second operand 23 states. [2020-10-15 00:10:30,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:30,411 INFO L93 Difference]: Finished difference Result 161 states and 189 transitions. [2020-10-15 00:10:30,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 00:10:30,412 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-15 00:10:30,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:30,417 INFO L225 Difference]: With dead ends: 161 [2020-10-15 00:10:30,417 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 00:10:30,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=125, Invalid=1681, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 00:10:30,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 00:10:30,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 120. [2020-10-15 00:10:30,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 00:10:30,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 140 transitions. [2020-10-15 00:10:30,441 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 140 transitions. Word has length 31 [2020-10-15 00:10:30,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:30,441 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 140 transitions. [2020-10-15 00:10:30,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 00:10:30,442 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 140 transitions. [2020-10-15 00:10:30,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:10:30,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:30,442 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:30,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-15 00:10:30,443 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:30,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:30,443 INFO L82 PathProgramCache]: Analyzing trace with hash -998750443, now seen corresponding path program 8 times [2020-10-15 00:10:30,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:30,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946573226] [2020-10-15 00:10:30,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:30,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:30,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:30,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-15 00:10:30,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:30,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-15 00:10:30,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:30,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:30,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:10:30,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:10:30,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-15 00:10:30,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:31,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:31,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:31,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:31,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:31,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:10:31,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:31,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:31,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:31,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:31,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:31,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:31,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-15 00:10:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:31,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:31,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:31,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:31,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:10:31,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:31,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:31,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:31,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:31,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:31,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:31,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-15 00:10:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:31,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:31,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:31,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:10:31,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:31,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:10:31,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:31,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:31,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:10:31,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:31,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:10:31,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:31,032 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 00:10:31,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946573226] [2020-10-15 00:10:31,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:31,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:10:31,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867831867] [2020-10-15 00:10:31,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:10:31,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:31,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:10:31,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:10:31,034 INFO L87 Difference]: Start difference. First operand 120 states and 140 transitions. Second operand 14 states. [2020-10-15 00:10:36,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:10:36,111 INFO L93 Difference]: Finished difference Result 162 states and 185 transitions. [2020-10-15 00:10:36,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 00:10:36,118 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-15 00:10:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:10:36,119 INFO L225 Difference]: With dead ends: 162 [2020-10-15 00:10:36,119 INFO L226 Difference]: Without dead ends: 160 [2020-10-15 00:10:36,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=83, Invalid=566, Unknown=1, NotChecked=0, Total=650 [2020-10-15 00:10:36,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-15 00:10:36,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 140. [2020-10-15 00:10:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 00:10:36,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 162 transitions. [2020-10-15 00:10:36,160 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 162 transitions. Word has length 34 [2020-10-15 00:10:36,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:10:36,160 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 162 transitions. [2020-10-15 00:10:36,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:10:36,160 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 162 transitions. [2020-10-15 00:10:36,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-15 00:10:36,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:10:36,163 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:10:36,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-15 00:10:36,163 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:10:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:10:36,164 INFO L82 PathProgramCache]: Analyzing trace with hash 435275989, now seen corresponding path program 18 times [2020-10-15 00:10:36,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:10:36,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924378880] [2020-10-15 00:10:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:10:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:36,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:36,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:36,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-15 00:10:36,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:36,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 674 [2020-10-15 00:10:36,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:36,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:36,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-15 00:10:36,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:10:36,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-15 00:10:36,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:37,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:10:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:10:37,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:10:37,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:10:37,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:10:37,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:10:37,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:10:37,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:10:37,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:10:37,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:10:37,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:10:37,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:10:37,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:10:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:10:37,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924378880] [2020-10-15 00:10:37,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:10:37,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-15 00:10:37,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014382177] [2020-10-15 00:10:37,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-15 00:10:37,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:10:37,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-15 00:10:37,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2020-10-15 00:10:37,780 INFO L87 Difference]: Start difference. First operand 140 states and 162 transitions. Second operand 24 states. [2020-10-15 00:11:15,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:15,876 INFO L93 Difference]: Finished difference Result 215 states and 251 transitions. [2020-10-15 00:11:15,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 00:11:15,876 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-15 00:11:15,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:15,878 INFO L225 Difference]: With dead ends: 215 [2020-10-15 00:11:15,878 INFO L226 Difference]: Without dead ends: 213 [2020-10-15 00:11:15,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=150, Invalid=1919, Unknown=1, NotChecked=0, Total=2070 [2020-10-15 00:11:15,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-15 00:11:15,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 179. [2020-10-15 00:11:15,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-15 00:11:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 205 transitions. [2020-10-15 00:11:15,922 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 205 transitions. Word has length 32 [2020-10-15 00:11:15,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:15,922 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 205 transitions. [2020-10-15 00:11:15,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-15 00:11:15,922 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 205 transitions. [2020-10-15 00:11:15,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 00:11:15,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:15,923 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:15,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-15 00:11:15,924 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:15,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:15,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1336143527, now seen corresponding path program 9 times [2020-10-15 00:11:15,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:15,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049107599] [2020-10-15 00:11:15,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:15,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:16,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:16,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-15 00:11:16,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:16,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-15 00:11:16,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:16,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:16,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:11:16,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:11:16,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-15 00:11:16,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:16,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:16,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:16,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:16,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:16,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:16,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:11:16,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:16,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:16,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:16,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:16,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:16,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-15 00:11:16,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-15 00:11:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:16,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:16,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:16,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:11:16,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:16,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:11:16,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:16,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:16,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:11:16,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:16,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:11:16,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:16,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-15 00:11:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:16,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:16,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:16,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 00:11:16,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:16,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:11:16,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:16,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:16,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:11:16,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:16,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-15 00:11:16,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 00:11:16,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049107599] [2020-10-15 00:11:16,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:16,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:11:16,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217529250] [2020-10-15 00:11:16,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:11:16,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:16,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:11:16,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:11:16,579 INFO L87 Difference]: Start difference. First operand 179 states and 205 transitions. Second operand 15 states. [2020-10-15 00:11:17,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:11:17,562 INFO L93 Difference]: Finished difference Result 205 states and 231 transitions. [2020-10-15 00:11:17,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 00:11:17,563 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-15 00:11:17,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:11:17,564 INFO L225 Difference]: With dead ends: 205 [2020-10-15 00:11:17,564 INFO L226 Difference]: Without dead ends: 203 [2020-10-15 00:11:17,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:11:17,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-15 00:11:17,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 143. [2020-10-15 00:11:17,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 00:11:17,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 166 transitions. [2020-10-15 00:11:17,592 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 166 transitions. Word has length 35 [2020-10-15 00:11:17,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:11:17,592 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 166 transitions. [2020-10-15 00:11:17,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:11:17,592 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 166 transitions. [2020-10-15 00:11:17,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 00:11:17,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:11:17,593 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:11:17,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-15 00:11:17,593 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:11:17,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:11:17,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1509207015, now seen corresponding path program 19 times [2020-10-15 00:11:17,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:11:17,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216575435] [2020-10-15 00:11:17,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:11:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:17,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:18,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:18,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-15 00:11:18,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:18,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 820 [2020-10-15 00:11:18,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:18,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:18,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-15 00:11:18,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 00:11:18,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-15 00:11:18,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:21,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:11:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:11:21,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:11:21,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:11:21,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:11:21,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:11:21,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:11:21,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:11:21,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:11:21,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:11:21,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:11:21,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:11:21,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:11:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:11:21,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216575435] [2020-10-15 00:11:21,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:11:21,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-15 00:11:21,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199441068] [2020-10-15 00:11:21,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-15 00:11:21,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:11:21,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-15 00:11:21,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=552, Unknown=1, NotChecked=0, Total=600 [2020-10-15 00:11:21,725 INFO L87 Difference]: Start difference. First operand 143 states and 166 transitions. Second operand 25 states.