/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/res1o.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:51:37,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:51:37,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:51:37,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:51:37,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:51:37,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:51:37,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:51:37,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:51:37,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:51:37,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:51:37,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:51:37,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:51:37,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:51:37,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:51:37,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:51:37,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:51:37,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:51:37,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:51:37,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:51:37,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:51:37,477 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:51:37,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:51:37,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:51:37,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:51:37,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:51:37,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:51:37,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:51:37,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:51:37,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:51:37,498 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:51:37,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:51:37,499 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:51:37,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:51:37,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:51:37,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:51:37,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:51:37,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:51:37,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:51:37,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:51:37,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:51:37,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:51:37,508 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 23:51:37,533 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:51:37,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:51:37,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:51:37,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:51:37,535 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:51:37,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:51:37,535 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:51:37,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:51:37,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:51:37,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:51:37,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:51:37,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:51:37,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:51:37,536 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:51:37,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:51:37,537 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:51:37,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:51:37,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:51:37,537 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:51:37,537 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:51:37,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:51:37,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:51:37,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:51:37,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:51:37,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:51:37,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:51:37,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:51:37,539 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:51:37,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:51:37,539 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:51:37,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:51:37,839 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:51:37,843 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:51:37,845 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:51:37,845 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:51:37,846 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res1o.c [2020-10-13 23:51:37,919 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d74557de4/b43b890e20c1426da4575c935615dc13/FLAG7107a1ba1 [2020-10-13 23:51:38,433 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:51:38,434 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/res1o.c [2020-10-13 23:51:38,442 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d74557de4/b43b890e20c1426da4575c935615dc13/FLAG7107a1ba1 [2020-10-13 23:51:38,770 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d74557de4/b43b890e20c1426da4575c935615dc13 [2020-10-13 23:51:38,781 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:51:38,783 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:51:38,784 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:51:38,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:51:38,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:51:38,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:51:38" (1/1) ... [2020-10-13 23:51:38,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a48f1ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:51:38, skipping insertion in model container [2020-10-13 23:51:38,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:51:38" (1/1) ... [2020-10-13 23:51:38,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:51:38,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:51:39,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:51:39,036 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:51:39,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:51:39,162 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:51:39,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:51:39 WrapperNode [2020-10-13 23:51:39,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:51:39,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:51:39,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:51:39,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:51:39,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:51:39" (1/1) ... [2020-10-13 23:51:39,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:51:39" (1/1) ... [2020-10-13 23:51:39,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:51:39" (1/1) ... [2020-10-13 23:51:39,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:51:39" (1/1) ... [2020-10-13 23:51:39,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:51:39" (1/1) ... [2020-10-13 23:51:39,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:51:39" (1/1) ... [2020-10-13 23:51:39,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:51:39" (1/1) ... [2020-10-13 23:51:39,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:51:39,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:51:39,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:51:39,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:51:39,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:51:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:51:39,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:51:39,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:51:39,282 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 23:51:39,282 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:51:39,282 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:51:39,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:51:39,283 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 23:51:39,283 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 23:51:39,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:51:39,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:51:39,284 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 23:51:39,284 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:51:39,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:51:39,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 23:51:39,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:51:39,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:51:39,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:51:39,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:51:39,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:51:39,573 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:51:39,574 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 23:51:39,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:51:39 BoogieIcfgContainer [2020-10-13 23:51:39,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:51:39,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:51:39,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:51:39,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:51:39,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:51:38" (1/3) ... [2020-10-13 23:51:39,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24cb7efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:51:39, skipping insertion in model container [2020-10-13 23:51:39,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:51:39" (2/3) ... [2020-10-13 23:51:39,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24cb7efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:51:39, skipping insertion in model container [2020-10-13 23:51:39,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:51:39" (3/3) ... [2020-10-13 23:51:39,589 INFO L109 eAbstractionObserver]: Analyzing ICFG res1o.c [2020-10-13 23:51:39,603 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:51:39,612 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:51:39,630 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:51:39,658 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:51:39,659 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:51:39,659 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:51:39,659 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:51:39,659 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:51:39,659 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:51:39,660 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:51:39,660 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:51:39,682 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-13 23:51:39,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 23:51:39,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:39,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:39,691 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:39,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:39,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1562148239, now seen corresponding path program 1 times [2020-10-13 23:51:39,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:39,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332078877] [2020-10-13 23:51:39,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:39,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:39,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:39,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:39,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:40,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:40,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:41,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:41,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:51:41,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:51:41,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1237 [2020-10-13 23:51:41,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:41,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:41,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:41,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:51:41,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:41,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:51:41,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:41,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:41,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:41,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:41,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:41,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:51:41,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:41,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:41,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:41,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:41,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:41,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 23:51:41,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:41,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:41,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:41,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:41,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:41,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:51:41,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:41,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:41,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:41,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 23:51:41,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:41,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:51:41,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332078877] [2020-10-13 23:51:41,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:51:41,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:51:41,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070882573] [2020-10-13 23:51:41,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:51:41,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:41,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:51:41,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:51:41,207 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-13 23:51:41,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:41,354 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2020-10-13 23:51:41,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:51:41,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-13 23:51:41,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:41,367 INFO L225 Difference]: With dead ends: 64 [2020-10-13 23:51:41,367 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 23:51:41,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:51:41,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 23:51:41,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-13 23:51:41,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 23:51:41,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-13 23:51:41,427 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2020-10-13 23:51:41,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:41,428 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-13 23:51:41,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:51:41,428 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-13 23:51:41,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 23:51:41,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:41,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:41,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:51:41,435 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:41,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:41,436 INFO L82 PathProgramCache]: Analyzing trace with hash 369304979, now seen corresponding path program 1 times [2020-10-13 23:51:41,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:41,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111130571] [2020-10-13 23:51:41,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:41,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:41,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:41,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:41,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:41,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:42,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:42,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:51:42,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:51:42,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 741 [2020-10-13 23:51:42,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:42,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:42,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:51:42,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:51:42,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:51:42,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:42,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:42,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:42,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:42,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:42,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:42,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:51:42,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:42,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:42,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:42,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:42,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:42,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:42,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:42,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:42,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:42,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:42,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:42,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:51:42,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:42,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:42,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:51:42,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:42,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:51:42,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:51:42,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111130571] [2020-10-13 23:51:42,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:51:42,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:51:42,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379794906] [2020-10-13 23:51:42,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:51:42,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:42,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:51:42,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:51:42,289 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 5 states. [2020-10-13 23:51:42,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:42,466 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2020-10-13 23:51:42,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:51:42,467 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-13 23:51:42,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:42,468 INFO L225 Difference]: With dead ends: 49 [2020-10-13 23:51:42,468 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:51:42,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:51:42,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:51:42,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-13 23:51:42,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 23:51:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-13 23:51:42,478 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 25 [2020-10-13 23:51:42,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:42,479 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-13 23:51:42,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:51:42,479 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-13 23:51:42,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 23:51:42,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:42,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:42,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:51:42,481 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:42,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1815337701, now seen corresponding path program 1 times [2020-10-13 23:51:42,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:42,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859105115] [2020-10-13 23:51:42,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:42,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:42,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:42,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:43,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:43,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:43,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:43,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:43,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:44,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:44,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:44,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:45,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:45,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:45,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:45,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:45,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 23:51:45,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 23:51:45,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2942 [2020-10-13 23:51:45,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:45,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:45,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:51:45,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:45,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:51:45,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:46,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:46,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:46,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:46,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:46,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:46,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:51:46,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:46,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:46,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:46,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:46,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:46,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:51:46,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:46,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:46,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:46,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:46,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:46,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 23:51:46,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:46,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:46,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:46,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:46,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:46,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:51:46,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859105115] [2020-10-13 23:51:46,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:46,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:51:46,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811770928] [2020-10-13 23:51:46,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:51:46,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:46,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:51:46,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:51:46,099 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 17 states. [2020-10-13 23:51:47,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:47,841 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-10-13 23:51:47,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:51:47,847 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-10-13 23:51:47,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:47,849 INFO L225 Difference]: With dead ends: 61 [2020-10-13 23:51:47,849 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 23:51:47,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:51:47,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 23:51:47,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2020-10-13 23:51:47,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 23:51:47,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-13 23:51:47,883 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 33 [2020-10-13 23:51:47,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:47,884 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-13 23:51:47,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:51:47,885 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-13 23:51:47,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:51:47,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:47,886 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:47,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:51:47,886 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:47,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:47,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1714093027, now seen corresponding path program 2 times [2020-10-13 23:51:47,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:47,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398163316] [2020-10-13 23:51:47,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:47,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:47,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:47,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:50,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:50,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:51:50,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:51:50,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2156 [2020-10-13 23:51:50,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:50,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:50,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:51:50,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:50,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:51:50,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:50,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:50,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:50,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:50,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:50,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:50,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:51:50,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:50,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:50,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:50,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:50,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:50,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:50,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:50,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:50,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:50,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:50,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:50,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:50,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:50,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:50,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:50,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:50,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:50,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:51:50,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398163316] [2020-10-13 23:51:50,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:50,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:51:50,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412092807] [2020-10-13 23:51:50,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:51:50,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:50,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:51:50,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:51:50,140 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 8 states. [2020-10-13 23:51:50,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:50,354 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2020-10-13 23:51:50,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:51:50,355 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-13 23:51:50,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:50,356 INFO L225 Difference]: With dead ends: 88 [2020-10-13 23:51:50,356 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 23:51:50,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:51:50,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 23:51:50,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2020-10-13 23:51:50,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 23:51:50,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-13 23:51:50,366 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 35 [2020-10-13 23:51:50,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:50,366 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-13 23:51:50,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:51:50,367 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-13 23:51:50,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:51:50,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:50,368 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:50,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:51:50,368 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:50,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:50,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1542892381, now seen corresponding path program 3 times [2020-10-13 23:51:50,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:50,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536230703] [2020-10-13 23:51:50,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:50,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:50,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:50,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:51,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:51,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:52,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:52,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:53,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:53,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:54,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:54,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:55,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:55,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:55,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:51:55,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:51:55,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:51:55,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:55,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:55,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:51:55,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:55,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:51:55,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:55,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:55,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:55,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:55,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:55,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:55,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:51:55,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:55,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:55,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:55,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:55,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:55,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:55,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:55,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:55,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:55,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:55,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:55,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:51:55,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:55,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:55,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:55,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:55,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:55,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:51:55,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536230703] [2020-10-13 23:51:55,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:55,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:51:55,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715515168] [2020-10-13 23:51:55,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:51:55,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:55,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:51:55,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:51:55,489 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 8 states. [2020-10-13 23:51:55,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:55,819 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-10-13 23:51:55,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:51:55,821 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-13 23:51:55,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:55,822 INFO L225 Difference]: With dead ends: 56 [2020-10-13 23:51:55,823 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 23:51:55,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:51:55,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 23:51:55,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-13 23:51:55,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 23:51:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-13 23:51:55,837 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2020-10-13 23:51:55,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:55,838 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-13 23:51:55,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:51:55,843 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-13 23:51:55,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 23:51:55,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:55,845 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:55,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:51:55,846 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:55,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:55,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1006388061, now seen corresponding path program 4 times [2020-10-13 23:51:55,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:55,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316276104] [2020-10-13 23:51:55,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:55,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:56,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:56,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:56,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:57,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:57,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:57,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:58,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:58,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:58,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:58,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:59,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:59,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:59,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:59,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:59,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:59,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:00,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:00,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:00,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:00,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 23:52:00,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 23:52:00,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:52:00,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:00,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:00,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:52:00,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:52:00,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:52:00,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:02,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:52:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:02,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:02,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:02,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:52:02,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:02,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:52:02,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:02,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:02,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:02,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:02,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:02,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:02,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:52:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:02,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:02,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:02,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:02,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:02,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:02,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:02,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:02,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:02,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:02,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:02,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:52:02,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316276104] [2020-10-13 23:52:02,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:52:02,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:52:02,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573472853] [2020-10-13 23:52:02,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:52:02,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:52:02,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:52:02,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:52:02,650 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 25 states. [2020-10-13 23:52:03,448 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-10-13 23:52:03,951 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-13 23:52:04,124 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2020-10-13 23:52:04,311 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2020-10-13 23:52:05,009 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-10-13 23:52:05,178 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-13 23:52:05,620 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-13 23:52:05,950 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-10-13 23:52:06,201 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2020-10-13 23:52:06,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:52:06,374 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-13 23:52:06,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:52:06,374 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 41 [2020-10-13 23:52:06,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:52:06,376 INFO L225 Difference]: With dead ends: 70 [2020-10-13 23:52:06,376 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 23:52:06,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=389, Invalid=2061, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 23:52:06,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 23:52:06,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-10-13 23:52:06,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 23:52:06,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-13 23:52:06,387 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2020-10-13 23:52:06,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:52:06,388 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-13 23:52:06,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:52:06,388 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-13 23:52:06,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 23:52:06,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:52:06,389 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:52:06,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:52:06,389 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:52:06,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:52:06,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1479213413, now seen corresponding path program 5 times [2020-10-13 23:52:06,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:52:06,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369901513] [2020-10-13 23:52:06,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:52:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:06,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:06,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:06,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:08,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:09,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:10,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:10,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:11,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:11,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 23:52:11,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:52:11,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:52:11,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:11,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:11,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:52:11,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:52:11,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:52:11,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:11,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:52:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:11,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:11,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:11,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:52:11,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:11,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:11,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:11,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:11,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:11,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:11,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:11,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:52:11,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:52:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:11,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:11,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:11,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:11,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:11,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:11,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:11,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:11,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:11,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:11,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:11,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 23:52:11,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369901513] [2020-10-13 23:52:11,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:52:11,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:52:11,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133276611] [2020-10-13 23:52:11,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:52:11,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:52:11,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:52:11,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:52:11,494 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 10 states. [2020-10-13 23:52:11,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:52:11,761 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2020-10-13 23:52:11,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:52:11,762 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-13 23:52:11,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:52:11,763 INFO L225 Difference]: With dead ends: 98 [2020-10-13 23:52:11,763 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 23:52:11,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:52:11,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 23:52:11,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-13 23:52:11,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 23:52:11,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-13 23:52:11,773 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 43 [2020-10-13 23:52:11,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:52:11,774 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-13 23:52:11,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:52:11,774 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-13 23:52:11,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 23:52:11,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:52:11,775 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:52:11,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:52:11,776 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:52:11,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:52:11,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1254787865, now seen corresponding path program 6 times [2020-10-13 23:52:11,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:52:11,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625975015] [2020-10-13 23:52:11,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:52:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:11,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:11,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:11,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:12,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:13,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:13,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:14,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:14,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:14,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:15,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:15,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:16,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:16,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:16,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:52:16,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:52:16,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:52:16,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:16,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:16,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:52:16,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:52:16,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:52:16,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:16,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:52:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:16,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:16,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:16,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:52:16,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:16,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:16,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:16,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:16,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:16,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:16,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:16,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:52:16,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:52:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:16,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:16,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:16,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:16,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:16,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:16,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:16,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:16,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:16,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:16,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:16,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 23:52:16,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625975015] [2020-10-13 23:52:16,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:52:16,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:52:16,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088417077] [2020-10-13 23:52:16,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:52:16,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:52:16,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:52:16,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:52:16,895 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 10 states. [2020-10-13 23:52:17,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:52:17,188 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2020-10-13 23:52:17,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:52:17,190 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-13 23:52:17,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:52:17,191 INFO L225 Difference]: With dead ends: 62 [2020-10-13 23:52:17,191 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 23:52:17,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:52:17,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 23:52:17,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-13 23:52:17,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 23:52:17,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-10-13 23:52:17,206 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 45 [2020-10-13 23:52:17,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:52:17,207 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-10-13 23:52:17,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:52:17,207 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-10-13 23:52:17,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 23:52:17,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:52:17,210 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:52:17,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:52:17,211 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:52:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:52:17,211 INFO L82 PathProgramCache]: Analyzing trace with hash -683545557, now seen corresponding path program 7 times [2020-10-13 23:52:17,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:52:17,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678156988] [2020-10-13 23:52:17,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:52:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:17,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:17,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:18,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:18,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:19,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:19,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:19,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:19,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:20,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:21,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:22,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:22,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 23:52:22,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:52:22,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:52:22,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:22,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:22,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:52:22,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:52:22,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:52:22,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:23,029 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2020-10-13 23:52:24,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:52:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:24,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:24,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:24,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:52:24,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:24,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:24,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:24,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:24,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:24,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:24,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:24,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:24,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:52:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:24,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:24,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:24,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:24,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:24,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:52:24,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:24,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:24,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:24,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:24,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:24,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:52:24,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678156988] [2020-10-13 23:52:24,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:52:24,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:52:24,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897713360] [2020-10-13 23:52:24,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:52:24,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:52:24,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:52:24,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:52:24,697 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 33 states. [2020-10-13 23:52:25,693 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-13 23:52:28,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:52:28,266 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2020-10-13 23:52:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:52:28,266 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 49 [2020-10-13 23:52:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:52:28,268 INFO L225 Difference]: With dead ends: 87 [2020-10-13 23:52:28,268 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 23:52:28,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=335, Invalid=3325, Unknown=0, NotChecked=0, Total=3660 [2020-10-13 23:52:28,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 23:52:28,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2020-10-13 23:52:28,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 23:52:28,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-10-13 23:52:28,283 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 49 [2020-10-13 23:52:28,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:52:28,283 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-10-13 23:52:28,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:52:28,284 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-10-13 23:52:28,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:52:28,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:52:28,285 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:52:28,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:52:28,285 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:52:28,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:52:28,285 INFO L82 PathProgramCache]: Analyzing trace with hash -688568531, now seen corresponding path program 8 times [2020-10-13 23:52:28,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:52:28,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738593296] [2020-10-13 23:52:28,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:52:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:28,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:28,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:28,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:33,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:33,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 23:52:33,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:52:33,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:52:33,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:33,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:33,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:52:33,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:52:33,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:52:33,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:33,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:52:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:33,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:33,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:33,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:52:33,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:33,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:33,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:33,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:33,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:33,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:33,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:33,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:33,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:52:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:33,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:33,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:33,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:33,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:33,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:33,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:33,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:33,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:33,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:33,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:33,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 23:52:33,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738593296] [2020-10-13 23:52:33,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:52:33,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:52:33,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947414131] [2020-10-13 23:52:33,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:52:33,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:52:33,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:52:33,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:52:33,421 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 12 states. [2020-10-13 23:52:33,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:52:33,799 INFO L93 Difference]: Finished difference Result 137 states and 150 transitions. [2020-10-13 23:52:33,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:52:33,800 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-13 23:52:33,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:52:33,801 INFO L225 Difference]: With dead ends: 137 [2020-10-13 23:52:33,801 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 23:52:33,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:52:33,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 23:52:33,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2020-10-13 23:52:33,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 23:52:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-10-13 23:52:33,814 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 51 [2020-10-13 23:52:33,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:52:33,814 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-10-13 23:52:33,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:52:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-10-13 23:52:33,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:52:33,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:52:33,816 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:52:33,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:52:33,816 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:52:33,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:52:33,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1049907603, now seen corresponding path program 9 times [2020-10-13 23:52:33,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:52:33,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619839479] [2020-10-13 23:52:33,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:52:33,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:33,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:33,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:33,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:36,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:36,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:37,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:37,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:38,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:38,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:38,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:38,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 23:52:38,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:52:38,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:52:38,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:38,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:38,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:52:38,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:52:38,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:52:38,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:52:38,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:52:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:38,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:38,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:38,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:52:38,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:38,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:38,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:38,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:38,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:38,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:38,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:38,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:52:38,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:52:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:38,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:38,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:38,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:38,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:38,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:38,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:38,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:38,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:38,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:38,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:38,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:52:38,969 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 23:52:38,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619839479] [2020-10-13 23:52:38,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:52:38,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:52:38,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577047160] [2020-10-13 23:52:38,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:52:38,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:52:38,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:52:38,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:52:38,971 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 12 states. [2020-10-13 23:52:39,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:52:39,396 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2020-10-13 23:52:39,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:52:39,397 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-13 23:52:39,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:52:39,398 INFO L225 Difference]: With dead ends: 80 [2020-10-13 23:52:39,398 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 23:52:39,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:52:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 23:52:39,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-13 23:52:39,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 23:52:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-13 23:52:39,408 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 51 [2020-10-13 23:52:39,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:52:39,408 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-13 23:52:39,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:52:39,408 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-13 23:52:39,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 23:52:39,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:52:39,410 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:52:39,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:52:39,410 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:52:39,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:52:39,410 INFO L82 PathProgramCache]: Analyzing trace with hash 874427315, now seen corresponding path program 10 times [2020-10-13 23:52:39,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:52:39,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969087488] [2020-10-13 23:52:39,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:52:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:39,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:40,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:41,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:41,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:41,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:42,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:43,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:44,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:44,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:44,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 23:52:44,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:52:44,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:52:44,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:44,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:44,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 23:52:44,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:52:44,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:52:44,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:45,306 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2020-10-13 23:52:45,481 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2020-10-13 23:52:45,758 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2020-10-13 23:52:45,925 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2020-10-13 23:52:46,139 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-10-13 23:52:46,292 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-13 23:52:46,504 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2020-10-13 23:52:46,696 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-13 23:52:47,185 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2020-10-13 23:52:47,990 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-13 23:52:49,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:52:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:49,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:49,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:49,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:52:49,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:49,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:49,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:49,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:49,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:49,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:49,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:49,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:49,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:52:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:49,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:49,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:49,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:49,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:49,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:52:49,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:49,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:49,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:49,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:49,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:49,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 1 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:52:49,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969087488] [2020-10-13 23:52:49,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:52:49,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 23:52:49,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254166495] [2020-10-13 23:52:49,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 23:52:49,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:52:49,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 23:52:49,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1589, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:52:49,857 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 42 states. [2020-10-13 23:52:50,717 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 44 [2020-10-13 23:52:50,924 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2020-10-13 23:52:51,182 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 48 [2020-10-13 23:52:51,486 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2020-10-13 23:52:52,001 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 74 [2020-10-13 23:52:52,370 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 62 [2020-10-13 23:52:52,635 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-10-13 23:52:52,916 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-10-13 23:52:53,149 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2020-10-13 23:52:53,433 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 55 [2020-10-13 23:52:53,896 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-10-13 23:52:54,624 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-13 23:52:54,920 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2020-10-13 23:52:55,190 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2020-10-13 23:52:57,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:52:57,417 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2020-10-13 23:52:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 23:52:57,418 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 57 [2020-10-13 23:52:57,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:52:57,419 INFO L225 Difference]: With dead ends: 87 [2020-10-13 23:52:57,419 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 23:52:57,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=479, Invalid=4777, Unknown=0, NotChecked=0, Total=5256 [2020-10-13 23:52:57,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 23:52:57,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2020-10-13 23:52:57,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 23:52:57,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2020-10-13 23:52:57,431 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 57 [2020-10-13 23:52:57,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:52:57,431 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2020-10-13 23:52:57,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 23:52:57,432 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2020-10-13 23:52:57,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 23:52:57,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:52:57,433 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:52:57,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:52:57,433 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:52:57,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:52:57,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1874742453, now seen corresponding path program 11 times [2020-10-13 23:52:57,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:52:57,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895741100] [2020-10-13 23:52:57,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:52:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:57,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:57,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:57,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:02,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:02,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 23:53:02,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:53:02,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:53:02,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:02,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:02,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:53:02,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:53:02,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:53:02,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:02,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:53:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:02,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:02,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:02,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:53:02,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:02,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:53:02,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:02,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:02,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:02,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:02,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:02,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:53:02,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:53:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:02,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:02,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:02,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:02,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:02,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:53:02,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:02,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:02,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:02,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:02,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:02,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-13 23:53:02,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895741100] [2020-10-13 23:53:02,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:53:02,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:53:02,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008195892] [2020-10-13 23:53:02,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:53:02,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:53:02,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:53:02,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:53:02,586 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand 14 states. [2020-10-13 23:53:03,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:53:03,080 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2020-10-13 23:53:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:53:03,081 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-13 23:53:03,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:53:03,082 INFO L225 Difference]: With dead ends: 149 [2020-10-13 23:53:03,082 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 23:53:03,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:53:03,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 23:53:03,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2020-10-13 23:53:03,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 23:53:03,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-10-13 23:53:03,099 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 59 [2020-10-13 23:53:03,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:53:03,100 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-10-13 23:53:03,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:53:03,100 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-10-13 23:53:03,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 23:53:03,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:53:03,102 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:53:03,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:53:03,102 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:53:03,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:53:03,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1933212681, now seen corresponding path program 12 times [2020-10-13 23:53:03,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:53:03,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723152034] [2020-10-13 23:53:03,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:53:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:03,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:03,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:03,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:03,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:08,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:08,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 23:53:08,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:53:08,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:53:08,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:08,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:08,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:53:08,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:53:08,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:53:08,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:08,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:53:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:08,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:08,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:08,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:53:08,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:08,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:53:08,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:08,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:08,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:08,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:08,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:08,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:53:08,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:53:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:08,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:08,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:08,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:08,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:08,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:53:08,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:08,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:08,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:08,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:08,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:08,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:53:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-13 23:53:08,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723152034] [2020-10-13 23:53:08,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:53:08,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:53:08,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461943696] [2020-10-13 23:53:08,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:53:08,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:53:08,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:53:08,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:53:08,304 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 14 states. [2020-10-13 23:53:09,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:53:09,059 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2020-10-13 23:53:09,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:53:09,059 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-10-13 23:53:09,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:53:09,060 INFO L225 Difference]: With dead ends: 82 [2020-10-13 23:53:09,060 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 23:53:09,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:53:09,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 23:53:09,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-13 23:53:09,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 23:53:09,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-13 23:53:09,072 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 61 [2020-10-13 23:53:09,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:53:09,072 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-13 23:53:09,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:53:09,072 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-13 23:53:09,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:53:09,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:53:09,078 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:53:09,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:53:09,079 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:53:09,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:53:09,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1999770427, now seen corresponding path program 13 times [2020-10-13 23:53:09,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:53:09,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944897279] [2020-10-13 23:53:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:53:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:09,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:09,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:11,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:13,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:14,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:14,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 23:53:14,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:53:14,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5216 [2020-10-13 23:53:14,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:14,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:14,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 23:53:14,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:53:14,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 23:53:14,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:15,118 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-13 23:53:15,262 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-13 23:53:19,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:53:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:19,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:19,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:19,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:53:19,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:19,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:53:19,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:19,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:19,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:19,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:19,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:19,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:19,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:53:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:19,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:19,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:19,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:19,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:19,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:53:19,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:19,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:19,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:19,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:19,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:19,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:53:19,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944897279] [2020-10-13 23:53:19,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:53:19,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 23:53:19,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365014773] [2020-10-13 23:53:19,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 23:53:19,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:53:19,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 23:53:19,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2058, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 23:53:19,118 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 48 states. [2020-10-13 23:53:19,706 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-13 23:53:20,164 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-13 23:53:20,618 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-10-13 23:53:21,117 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 54 [2020-10-13 23:53:21,418 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2020-10-13 23:53:21,811 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2020-10-13 23:53:22,197 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2020-10-13 23:53:22,879 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-13 23:53:23,150 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-13 23:53:26,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:53:26,265 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2020-10-13 23:53:26,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-13 23:53:26,266 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 65 [2020-10-13 23:53:26,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:53:26,268 INFO L225 Difference]: With dead ends: 100 [2020-10-13 23:53:26,268 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 23:53:26,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=560, Invalid=5446, Unknown=0, NotChecked=0, Total=6006 [2020-10-13 23:53:26,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 23:53:26,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2020-10-13 23:53:26,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 23:53:26,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2020-10-13 23:53:26,283 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 65 [2020-10-13 23:53:26,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:53:26,283 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2020-10-13 23:53:26,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 23:53:26,283 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2020-10-13 23:53:26,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 23:53:26,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:53:26,284 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:53:26,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:53:26,285 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:53:26,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:53:26,285 INFO L82 PathProgramCache]: Analyzing trace with hash 997714493, now seen corresponding path program 14 times [2020-10-13 23:53:26,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:53:26,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021783334] [2020-10-13 23:53:26,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:53:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:26,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:26,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:26,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:31,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:31,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 23:53:31,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:53:31,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:53:31,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:31,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:31,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:53:31,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:53:31,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 23:53:31,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:31,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:53:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:31,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:31,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:31,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:53:31,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:31,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:53:31,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:31,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:31,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:31,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:31,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:31,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:53:31,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:53:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:31,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:31,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:31,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:31,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:31,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:53:31,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:31,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:31,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:31,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:31,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:31,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:53:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-13 23:53:31,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021783334] [2020-10-13 23:53:31,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:53:31,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:53:31,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620030019] [2020-10-13 23:53:31,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:53:31,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:53:31,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:53:31,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:53:31,543 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand 16 states. [2020-10-13 23:53:32,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:53:32,182 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2020-10-13 23:53:32,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:53:32,183 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-10-13 23:53:32,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:53:32,184 INFO L225 Difference]: With dead ends: 169 [2020-10-13 23:53:32,185 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 23:53:32,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:53:32,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 23:53:32,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2020-10-13 23:53:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 23:53:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2020-10-13 23:53:32,195 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 67 [2020-10-13 23:53:32,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:53:32,196 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2020-10-13 23:53:32,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:53:32,196 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2020-10-13 23:53:32,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 23:53:32,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:53:32,196 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:53:32,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:53:32,197 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:53:32,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:53:32,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1357942913, now seen corresponding path program 15 times [2020-10-13 23:53:32,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:53:32,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868760746] [2020-10-13 23:53:32,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:53:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:32,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:32,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:32,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:35,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:37,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:37,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 23:53:37,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:53:37,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:53:37,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:37,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:37,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:53:37,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:53:37,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 23:53:37,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:37,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:53:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:37,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:37,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:37,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:53:37,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:37,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:53:37,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:37,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:37,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:37,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:37,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:37,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 23:53:37,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:53:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:37,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:37,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:37,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:37,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:37,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:53:37,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:37,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:37,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:37,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:37,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:37,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:53:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-10-13 23:53:37,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868760746] [2020-10-13 23:53:37,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:53:37,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:53:37,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376052741] [2020-10-13 23:53:37,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:53:37,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:53:37,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:53:37,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:53:37,405 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 16 states. [2020-10-13 23:53:38,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:53:38,155 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2020-10-13 23:53:38,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:53:38,158 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-10-13 23:53:38,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:53:38,159 INFO L225 Difference]: With dead ends: 92 [2020-10-13 23:53:38,159 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 23:53:38,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:53:38,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 23:53:38,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-13 23:53:38,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 23:53:38,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-10-13 23:53:38,168 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 69 [2020-10-13 23:53:38,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:53:38,168 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-10-13 23:53:38,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:53:38,168 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-10-13 23:53:38,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 23:53:38,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:53:38,169 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:53:38,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:53:38,169 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:53:38,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:53:38,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1930693315, now seen corresponding path program 16 times [2020-10-13 23:53:38,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:53:38,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818149829] [2020-10-13 23:53:38,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:53:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:38,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:40,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:42,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:43,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:43,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 23:53:43,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:53:43,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:53:43,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:43,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:43,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-13 23:53:43,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:53:43,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 23:53:43,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:44,055 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2020-10-13 23:53:44,201 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2020-10-13 23:53:44,365 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2020-10-13 23:53:44,527 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2020-10-13 23:53:44,721 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2020-10-13 23:53:44,888 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 46 [2020-10-13 23:53:45,073 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-10-13 23:53:45,284 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-10-13 23:53:45,518 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-10-13 23:53:45,895 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 69 [2020-10-13 23:53:46,175 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 58 [2020-10-13 23:53:46,446 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 54 [2020-10-13 23:53:46,703 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 54 [2020-10-13 23:53:46,973 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 59 [2020-10-13 23:53:47,239 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2020-10-13 23:53:47,517 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 54 [2020-10-13 23:53:47,780 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2020-10-13 23:53:48,052 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 55 [2020-10-13 23:53:48,283 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2020-10-13 23:53:48,552 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2020-10-13 23:53:48,775 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 29 [2020-10-13 23:53:48,999 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 28 [2020-10-13 23:53:49,851 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2020-10-13 23:53:50,166 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 46 [2020-10-13 23:53:50,437 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 47 [2020-10-13 23:53:50,753 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 49 [2020-10-13 23:53:51,065 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 49 [2020-10-13 23:53:51,424 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2020-10-13 23:53:51,752 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2020-10-13 23:53:52,096 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2020-10-13 23:53:52,474 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 58 [2020-10-13 23:53:52,827 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2020-10-13 23:53:53,094 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-13 23:53:53,341 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-13 23:53:53,917 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-13 23:53:54,838 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-10-13 23:53:55,324 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-10-13 23:53:56,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:53:56,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:56,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:56,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:56,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:53:56,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:56,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:53:56,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:56,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:56,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:56,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:56,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:56,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:56,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:53:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:56,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:56,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:56,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:56,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:56,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:53:56,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:56,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:56,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:56,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:56,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:56,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 20 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:53:56,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818149829] [2020-10-13 23:53:56,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:53:56,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-13 23:53:56,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575420434] [2020-10-13 23:53:56,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-13 23:53:56,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:53:56,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-13 23:53:56,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3058, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 23:53:56,281 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 58 states. [2020-10-13 23:53:57,947 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 52 [2020-10-13 23:53:58,209 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 56 [2020-10-13 23:53:58,477 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 52 [2020-10-13 23:53:58,799 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 59 [2020-10-13 23:53:59,191 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2020-10-13 23:53:59,462 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-13 23:53:59,705 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-13 23:54:00,392 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 114 [2020-10-13 23:54:00,772 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 63 [2020-10-13 23:54:01,056 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 60 [2020-10-13 23:54:01,296 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 57 [2020-10-13 23:54:01,553 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 55 [2020-10-13 23:54:02,695 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 54 [2020-10-13 23:54:03,155 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 55 [2020-10-13 23:54:03,863 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 75 [2020-10-13 23:54:04,095 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-13 23:54:04,905 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 91 [2020-10-13 23:54:05,677 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 90 [2020-10-13 23:54:06,632 WARN L193 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 92 [2020-10-13 23:54:07,357 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 85 [2020-10-13 23:54:08,154 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 84 [2020-10-13 23:54:08,712 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 77 [2020-10-13 23:54:09,263 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 82 [2020-10-13 23:54:09,810 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 75 [2020-10-13 23:54:10,341 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 81 [2020-10-13 23:54:10,705 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 50 [2020-10-13 23:54:11,020 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 49 [2020-10-13 23:54:11,351 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 55 [2020-10-13 23:54:11,956 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 96 [2020-10-13 23:54:12,786 WARN L193 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 100 [2020-10-13 23:54:13,142 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2020-10-13 23:54:14,121 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-10-13 23:54:14,624 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-10-13 23:54:15,216 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 87 [2020-10-13 23:54:15,794 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 89 [2020-10-13 23:54:16,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:54:16,110 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2020-10-13 23:54:16,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-13 23:54:16,117 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 73 [2020-10-13 23:54:16,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:54:16,119 INFO L225 Difference]: With dead ends: 111 [2020-10-13 23:54:16,119 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 23:54:16,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2994 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=1081, Invalid=11129, Unknown=0, NotChecked=0, Total=12210 [2020-10-13 23:54:16,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 23:54:16,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-13 23:54:16,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 23:54:16,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-10-13 23:54:16,133 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 73 [2020-10-13 23:54:16,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:54:16,134 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-10-13 23:54:16,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-13 23:54:16,134 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-10-13 23:54:16,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 23:54:16,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:54:16,135 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:54:16,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:54:16,136 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:54:16,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:54:16,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1353818299, now seen corresponding path program 17 times [2020-10-13 23:54:16,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:54:16,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158952311] [2020-10-13 23:54:16,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:54:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:16,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:16,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:20,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:21,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:21,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 23:54:21,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:54:21,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:54:21,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:21,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:21,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:54:21,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 23:54:21,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:54:21,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:54:21,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:54:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:21,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:21,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:21,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:54:21,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:54:21,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:54:21,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:21,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:21,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:54:21,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:54:21,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:54:21,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:54:21,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:54:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:21,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:21,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:21,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:54:21,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:54:21,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:54:21,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:21,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:21,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:54:21,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:54:21,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:54:21,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:54:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 23:54:21,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158952311] [2020-10-13 23:54:21,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:54:21,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:54:21,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856995052] [2020-10-13 23:54:21,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:54:21,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:54:21,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:54:21,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:54:21,384 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 18 states. [2020-10-13 23:54:22,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:54:22,566 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2020-10-13 23:54:22,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:54:22,568 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-10-13 23:54:22,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:54:22,569 INFO L225 Difference]: With dead ends: 116 [2020-10-13 23:54:22,569 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 23:54:22,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:54:22,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 23:54:22,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 80. [2020-10-13 23:54:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 23:54:22,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2020-10-13 23:54:22,580 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 75 [2020-10-13 23:54:22,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:54:22,580 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2020-10-13 23:54:22,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:54:22,581 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2020-10-13 23:54:22,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 23:54:22,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:54:22,582 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:54:22,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:54:22,582 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:54:22,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:54:22,582 INFO L82 PathProgramCache]: Analyzing trace with hash -399591543, now seen corresponding path program 18 times [2020-10-13 23:54:22,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:54:22,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076844914] [2020-10-13 23:54:22,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:54:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:22,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:22,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:22,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:27,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:27,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 23:54:27,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:54:27,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:54:27,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:27,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:27,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:54:27,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:54:27,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 23:54:27,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:54:27,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:54:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:27,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:27,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:27,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:54:27,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:54:27,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:54:27,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:27,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:27,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:54:27,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:54:27,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:54:27,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:54:27,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:54:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:27,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:27,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:27,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:54:27,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:54:27,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:54:27,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:27,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:27,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:54:27,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:54:27,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:54:27,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:54:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-13 23:54:27,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076844914] [2020-10-13 23:54:27,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:54:27,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:54:27,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239598140] [2020-10-13 23:54:27,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:54:27,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:54:27,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:54:27,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:54:27,868 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 18 states. [2020-10-13 23:54:28,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:54:28,526 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2020-10-13 23:54:28,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:54:28,527 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-10-13 23:54:28,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:54:28,529 INFO L225 Difference]: With dead ends: 140 [2020-10-13 23:54:28,529 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 23:54:28,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:54:28,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 23:54:28,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2020-10-13 23:54:28,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:54:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-10-13 23:54:28,542 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 79 [2020-10-13 23:54:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:54:28,542 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-10-13 23:54:28,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:54:28,543 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-10-13 23:54:28,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 23:54:28,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:54:28,543 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:54:28,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:54:28,544 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:54:28,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:54:28,544 INFO L82 PathProgramCache]: Analyzing trace with hash 811375179, now seen corresponding path program 19 times [2020-10-13 23:54:28,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:54:28,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432495441] [2020-10-13 23:54:28,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:54:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:28,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:31,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:33,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:33,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 23:54:33,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:54:33,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 23:54:33,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:33,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:33,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-13 23:54:33,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:54:33,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 23:54:33,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:54:34,064 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2020-10-13 23:54:34,314 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2020-10-13 23:54:34,593 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2020-10-13 23:54:34,805 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2020-10-13 23:54:35,050 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 43 [2020-10-13 23:54:35,290 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 43 [2020-10-13 23:54:35,532 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2020-10-13 23:54:35,748 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2020-10-13 23:54:36,010 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 51 [2020-10-13 23:54:36,275 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 51 [2020-10-13 23:54:36,523 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2020-10-13 23:54:36,881 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 64 [2020-10-13 23:54:37,251 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 64 [2020-10-13 23:54:37,482 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2020-10-13 23:54:37,768 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 62 [2020-10-13 23:54:38,027 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 57 [2020-10-13 23:54:38,297 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 57 [2020-10-13 23:54:38,547 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2020-10-13 23:54:38,824 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 57 [2020-10-13 23:54:39,209 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 67 [2020-10-13 23:54:39,504 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 54 [2020-10-13 23:54:39,871 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 61 [2020-10-13 23:54:40,153 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 49 [2020-10-13 23:54:40,510 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 52 [2020-10-13 23:54:40,780 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 43 [2020-10-13 23:54:41,058 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 42 [2020-10-13 23:54:41,302 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 31 [2020-10-13 23:54:41,545 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 29 [2020-10-13 23:54:42,039 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 33 [2020-10-13 23:54:42,312 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 34 [2020-10-13 23:54:42,642 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 36 [2020-10-13 23:54:42,967 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 36 [2020-10-13 23:54:43,361 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 42 [2020-10-13 23:54:43,756 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 42 [2020-10-13 23:54:44,130 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 44 [2020-10-13 23:54:44,521 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 45 [2020-10-13 23:54:44,933 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 47 [2020-10-13 23:54:45,301 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-10-13 23:54:45,752 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 56 [2020-10-13 23:54:46,221 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 61 [2020-10-13 23:54:46,675 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 60 [2020-10-13 23:54:47,089 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 57 [2020-10-13 23:54:47,433 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2020-10-13 23:54:47,840 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 57 [2020-10-13 23:54:48,233 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2020-10-13 23:54:48,758 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 67 [2020-10-13 23:54:49,189 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 59 [2020-10-13 23:54:49,667 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 57 [2020-10-13 23:54:50,125 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 48 [2020-10-13 23:54:50,546 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2020-10-13 23:54:50,907 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2020-10-13 23:54:51,292 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 48 [2020-10-13 23:54:51,618 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2020-10-13 23:54:51,990 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2020-10-13 23:54:52,304 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2020-10-13 23:54:52,678 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 35 [2020-10-13 23:54:53,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:54:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:53,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:53,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:53,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:54:53,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:54:53,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:54:53,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:53,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:53,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:54:53,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:54:53,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:54:53,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:54:53,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:54:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:53,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:53,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:53,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:54:53,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:54:53,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:54:53,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:53,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:53,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:54:53,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:54:53,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:54:53,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:54:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:54:53,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432495441] [2020-10-13 23:54:53,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:54:53,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-13 23:54:53,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842872617] [2020-10-13 23:54:53,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-13 23:54:53,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:54:53,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-13 23:54:53,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=4008, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 23:54:53,641 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 67 states. [2020-10-13 23:54:56,411 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 217 DAG size of output: 169 [2020-10-13 23:54:58,407 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 220 DAG size of output: 166 [2020-10-13 23:55:00,940 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 220 DAG size of output: 172 [2020-10-13 23:55:02,348 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 202 DAG size of output: 149 [2020-10-13 23:55:03,361 WARN L193 SmtUtils]: Spent 791.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 126 [2020-10-13 23:55:04,252 WARN L193 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 107 [2020-10-13 23:55:05,208 WARN L193 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 117 [2020-10-13 23:55:09,202 WARN L193 SmtUtils]: Spent 3.75 s on a formula simplification. DAG size of input: 283 DAG size of output: 240 [2020-10-13 23:55:09,700 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2020-10-13 23:55:10,187 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-13 23:55:11,690 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 201 DAG size of output: 142 [2020-10-13 23:55:12,619 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 107 [2020-10-13 23:55:13,681 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 102 [2020-10-13 23:55:14,824 WARN L193 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 132 [2020-10-13 23:55:15,572 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 97 [2020-10-13 23:55:16,135 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 86 [2020-10-13 23:55:16,734 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-10-13 23:55:17,244 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 72 [2020-10-13 23:55:17,692 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-13 23:55:18,115 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 59 [2020-10-13 23:55:18,426 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2020-10-13 23:55:18,745 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2020-10-13 23:55:20,407 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 173 DAG size of output: 157 [2020-10-13 23:55:20,794 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-13 23:55:23,138 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 113 [2020-10-13 23:55:24,240 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 121 [2020-10-13 23:55:24,942 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 103 [2020-10-13 23:55:26,111 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 111 [2020-10-13 23:55:26,860 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2020-10-13 23:55:27,528 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2020-10-13 23:55:28,523 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 134