/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 SingleStatement --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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:43:16,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:43:16,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:43:16,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:43:16,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:43:16,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:43:16,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:43:16,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:43:16,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:43:16,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:43:16,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:43:16,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:43:16,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:43:16,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:43:16,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:43:16,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:43:16,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:43:16,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:43:16,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:43:16,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:43:16,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:43:16,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:43:16,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:43:16,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:43:16,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:43:16,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:43:16,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:43:16,282 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:43:16,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:43:16,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:43:16,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:43:16,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:43:16,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:43:16,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:43:16,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:43:16,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:43:16,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:43:16,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:43:16,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:43:16,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:43:16,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:43:16,296 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 [2020-09-24 20:43:16,341 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:43:16,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:43:16,343 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:43:16,343 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:43:16,343 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:43:16,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:43:16,344 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:43:16,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:43:16,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:43:16,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:43:16,345 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:43:16,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:43:16,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:43:16,346 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:43:16,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:43:16,347 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:43:16,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:43:16,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:43:16,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:43:16,348 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:43:16,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:43:16,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:43:16,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:43:16,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:43:16,349 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:43:16,349 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:43:16,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:43:16,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:43:16,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:43:16,350 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 -> SingleStatement 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=BIGGEST;log-additional-information=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=BIGGEST;log-additional-information=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=BIGGEST;log-additional-information=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=BIGGEST;log-additional-information=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=BIGGEST;log-additional-information=true; [2020-09-24 20:43:16,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:43:16,859 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:43:16,866 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:43:16,870 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:43:16,870 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:43:16,871 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-24 20:43:16,948 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca2fc786c/7a47922f71664ecaac9a29ef6d0372a4/FLAG21435a89a [2020-09-24 20:43:17,497 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:43:17,498 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-24 20:43:17,506 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca2fc786c/7a47922f71664ecaac9a29ef6d0372a4/FLAG21435a89a [2020-09-24 20:43:17,803 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca2fc786c/7a47922f71664ecaac9a29ef6d0372a4 [2020-09-24 20:43:17,817 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:43:17,823 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:43:17,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:43:17,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:43:17,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:43:17,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:43:17" (1/1) ... [2020-09-24 20:43:17,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6251f5ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:17, skipping insertion in model container [2020-09-24 20:43:17,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:43:17" (1/1) ... [2020-09-24 20:43:17,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:43:17,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:43:18,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:43:18,077 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:43:18,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:43:18,110 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:43:18,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:18 WrapperNode [2020-09-24 20:43:18,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:43:18,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:43:18,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:43:18,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:43:18,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:18" (1/1) ... [2020-09-24 20:43:18,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:18" (1/1) ... [2020-09-24 20:43:18,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:18" (1/1) ... [2020-09-24 20:43:18,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:18" (1/1) ... [2020-09-24 20:43:18,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:18" (1/1) ... [2020-09-24 20:43:18,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:18" (1/1) ... [2020-09-24 20:43:18,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:18" (1/1) ... [2020-09-24 20:43:18,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:43:18,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:43:18,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:43:18,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:43:18,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:18" (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 [2020-09-24 20:43:18,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:43:18,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:43:18,316 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 20:43:18,317 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 20:43:18,317 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:43:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:43:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 20:43:18,317 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 20:43:18,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 20:43:18,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 20:43:18,318 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:43:18,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:43:18,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:43:18,658 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:43:18,658 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 20:43:18,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:43:18 BoogieIcfgContainer [2020-09-24 20:43:18,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:43:18,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:43:18,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:43:18,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:43:18,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:43:17" (1/3) ... [2020-09-24 20:43:18,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e7bd29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:43:18, skipping insertion in model container [2020-09-24 20:43:18,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:43:18" (2/3) ... [2020-09-24 20:43:18,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e7bd29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:43:18, skipping insertion in model container [2020-09-24 20:43:18,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:43:18" (3/3) ... [2020-09-24 20:43:18,673 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-09-24 20:43:18,683 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:43:18,693 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:43:18,713 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:43:18,742 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:43:18,743 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:43:18,743 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:43:18,743 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:43:18,743 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:43:18,743 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:43:18,744 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:43:18,744 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:43:18,765 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-24 20:43:18,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-24 20:43:18,772 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:18,773 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:18,774 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:18,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:18,782 INFO L82 PathProgramCache]: Analyzing trace with hash -270656080, now seen corresponding path program 1 times [2020-09-24 20:43:18,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:18,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217140823] [2020-09-24 20:43:18,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:18,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:18,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:18,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:18,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 20:43:18,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:43:18,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-09-24 20:43:18,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:18,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 20:43:18,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:43:18,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 20:43:18,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 20:43:19,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:19,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:19,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:19,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:19,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:19,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 20:43:19,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:19,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:19,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:19,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:19,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:19,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217140823] [2020-09-24 20:43:19,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:43:19,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 20:43:19,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336929863] [2020-09-24 20:43:19,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 20:43:19,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:19,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 20:43:19,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:43:19,165 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 6 states. [2020-09-24 20:43:19,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:19,313 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-09-24 20:43:19,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 20:43:19,315 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-09-24 20:43:19,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:19,326 INFO L225 Difference]: With dead ends: 60 [2020-09-24 20:43:19,326 INFO L226 Difference]: Without dead ends: 31 [2020-09-24 20:43:19,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 20:43:19,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-24 20:43:19,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-09-24 20:43:19,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-24 20:43:19,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-09-24 20:43:19,378 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 11 [2020-09-24 20:43:19,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:19,378 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-09-24 20:43:19,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 20:43:19,379 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-09-24 20:43:19,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-24 20:43:19,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:19,380 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] [2020-09-24 20:43:19,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:43:19,381 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:19,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:19,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1780115143, now seen corresponding path program 1 times [2020-09-24 20:43:19,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:19,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895231937] [2020-09-24 20:43:19,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:19,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:19,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:19,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:19,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:19,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:20,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:20,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 20:43:20,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 20:43:20,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-09-24 20:43:20,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:20,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:43:20,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:43:20,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 20:43:20,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:43:20,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:20,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:20,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:20,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:20,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:20,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:43:20,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:20,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:20,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:20,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:20,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:43:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:20,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895231937] [2020-09-24 20:43:20,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:20,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 20:43:20,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741767918] [2020-09-24 20:43:20,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 20:43:20,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:20,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 20:43:20,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 20:43:20,161 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2020-09-24 20:43:20,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:20,234 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-09-24 20:43:20,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 20:43:20,249 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-09-24 20:43:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:20,250 INFO L225 Difference]: With dead ends: 46 [2020-09-24 20:43:20,251 INFO L226 Difference]: Without dead ends: 39 [2020-09-24 20:43:20,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-24 20:43:20,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-24 20:43:20,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-09-24 20:43:20,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 20:43:20,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-09-24 20:43:20,259 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 22 [2020-09-24 20:43:20,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:20,259 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-09-24 20:43:20,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 20:43:20,260 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-09-24 20:43:20,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-24 20:43:20,261 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:20,262 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:20,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:43:20,262 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:20,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:20,263 INFO L82 PathProgramCache]: Analyzing trace with hash -703709792, now seen corresponding path program 2 times [2020-09-24 20:43:20,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:20,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280914633] [2020-09-24 20:43:20,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:20,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:20,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:20,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:20,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:20,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:20,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:20,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:21,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:21,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:21,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:22,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:22,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:22,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:22,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-24 20:43:22,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-24 20:43:22,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2304 [2020-09-24 20:43:22,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:22,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 20:43:22,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:43:22,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 20:43:22,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:43:22,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:22,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:22,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:22,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:22,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:22,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:22,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:22,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:22,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:22,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:22,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:22,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280914633] [2020-09-24 20:43:22,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:22,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 20:43:22,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928165232] [2020-09-24 20:43:22,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 20:43:22,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:22,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 20:43:22,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-24 20:43:22,709 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 11 states. [2020-09-24 20:43:22,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:22,946 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2020-09-24 20:43:22,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 20:43:22,947 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-09-24 20:43:22,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:22,948 INFO L225 Difference]: With dead ends: 77 [2020-09-24 20:43:22,949 INFO L226 Difference]: Without dead ends: 67 [2020-09-24 20:43:22,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2020-09-24 20:43:22,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-24 20:43:22,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2020-09-24 20:43:22,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 20:43:22,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-09-24 20:43:22,957 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 29 [2020-09-24 20:43:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:22,957 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-09-24 20:43:22,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 20:43:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-09-24 20:43:22,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 20:43:22,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:22,959 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:22,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:43:22,960 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:22,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:22,960 INFO L82 PathProgramCache]: Analyzing trace with hash -198489987, now seen corresponding path program 1 times [2020-09-24 20:43:22,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:22,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806600897] [2020-09-24 20:43:22,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:22,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:22,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:23,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:23,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:23,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:23,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:23,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:23,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:23,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:23,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:23,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 20:43:23,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 20:43:23,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 991 [2020-09-24 20:43:23,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:23,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 20:43:23,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:43:23,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 20:43:23,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:24,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:24,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:24,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:24,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:24,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:24,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:24,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:24,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:24,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:24,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:24,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:24,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806600897] [2020-09-24 20:43:24,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:24,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 20:43:24,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696256250] [2020-09-24 20:43:24,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 20:43:24,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:24,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 20:43:24,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-24 20:43:24,072 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 11 states. [2020-09-24 20:43:24,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:24,305 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-09-24 20:43:24,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 20:43:24,306 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-09-24 20:43:24,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:24,309 INFO L225 Difference]: With dead ends: 76 [2020-09-24 20:43:24,310 INFO L226 Difference]: Without dead ends: 69 [2020-09-24 20:43:24,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2020-09-24 20:43:24,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-24 20:43:24,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2020-09-24 20:43:24,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-24 20:43:24,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-09-24 20:43:24,319 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 31 [2020-09-24 20:43:24,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:24,320 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-09-24 20:43:24,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 20:43:24,320 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-09-24 20:43:24,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 20:43:24,321 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:24,322 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:24,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 20:43:24,322 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:24,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:24,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1146309440, now seen corresponding path program 2 times [2020-09-24 20:43:24,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:24,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661277044] [2020-09-24 20:43:24,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:24,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:24,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:24,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:24,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:24,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:24,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:25,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:25,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:25,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 20:43:25,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 20:43:25,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 715 [2020-09-24 20:43:25,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:25,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 20:43:25,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:43:25,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 20:43:25,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:43:25,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:25,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:25,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:25,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:25,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:25,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:25,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:25,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:25,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:25,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:25,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:25,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661277044] [2020-09-24 20:43:25,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:25,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 20:43:25,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527056814] [2020-09-24 20:43:25,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 20:43:25,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:25,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 20:43:25,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-09-24 20:43:25,174 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 12 states. [2020-09-24 20:43:25,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:25,793 INFO L93 Difference]: Finished difference Result 133 states and 147 transitions. [2020-09-24 20:43:25,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-24 20:43:25,794 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-09-24 20:43:25,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:25,796 INFO L225 Difference]: With dead ends: 133 [2020-09-24 20:43:25,796 INFO L226 Difference]: Without dead ends: 123 [2020-09-24 20:43:25,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 20:43:25,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-24 20:43:25,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 91. [2020-09-24 20:43:25,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-24 20:43:25,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2020-09-24 20:43:25,809 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 33 [2020-09-24 20:43:25,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:25,809 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2020-09-24 20:43:25,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 20:43:25,810 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2020-09-24 20:43:25,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 20:43:25,811 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:25,811 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:25,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 20:43:25,812 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:25,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:25,812 INFO L82 PathProgramCache]: Analyzing trace with hash -34853245, now seen corresponding path program 1 times [2020-09-24 20:43:25,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:25,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710006209] [2020-09-24 20:43:25,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:25,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:25,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:25,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-24 20:43:25,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:25,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-09-24 20:43:25,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:25,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:43:25,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:43:25,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 20:43:25,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:43:26,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:26,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:26,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:26,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:26,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:26,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:26,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:26,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:26,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:26,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:26,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:26,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710006209] [2020-09-24 20:43:26,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:26,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 20:43:26,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932595493] [2020-09-24 20:43:26,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 20:43:26,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:26,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 20:43:26,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-24 20:43:26,009 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand 8 states. [2020-09-24 20:43:26,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:26,085 INFO L93 Difference]: Finished difference Result 146 states and 160 transitions. [2020-09-24 20:43:26,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 20:43:26,086 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-09-24 20:43:26,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:26,087 INFO L225 Difference]: With dead ends: 146 [2020-09-24 20:43:26,087 INFO L226 Difference]: Without dead ends: 139 [2020-09-24 20:43:26,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-09-24 20:43:26,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-24 20:43:26,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 98. [2020-09-24 20:43:26,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-24 20:43:26,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 110 transitions. [2020-09-24 20:43:26,098 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 110 transitions. Word has length 35 [2020-09-24 20:43:26,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:26,098 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 110 transitions. [2020-09-24 20:43:26,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 20:43:26,098 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 110 transitions. [2020-09-24 20:43:26,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-24 20:43:26,100 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:26,100 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:26,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 20:43:26,101 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:26,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:26,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1224235018, now seen corresponding path program 3 times [2020-09-24 20:43:26,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:26,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610794439] [2020-09-24 20:43:26,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:26,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:26,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:26,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:26,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:26,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:26,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:26,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:26,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:26,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:27,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:27,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:27,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:27,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:27,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:28,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:28,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:28,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:28,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:29,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:29,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:31,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:31,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 20:43:31,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-09-24 20:43:31,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 20:43:31,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:31,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 20:43:31,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:43:31,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-24 20:43:31,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:31,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:31,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:31,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:31,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:31,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:31,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:31,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:31,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:31,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:31,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:31,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:31,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610794439] [2020-09-24 20:43:31,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:31,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 20:43:31,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17548558] [2020-09-24 20:43:31,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 20:43:31,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:31,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 20:43:31,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-24 20:43:31,238 INFO L87 Difference]: Start difference. First operand 98 states and 110 transitions. Second operand 14 states. [2020-09-24 20:43:31,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:31,947 INFO L93 Difference]: Finished difference Result 171 states and 190 transitions. [2020-09-24 20:43:31,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-24 20:43:31,948 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-09-24 20:43:31,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:31,950 INFO L225 Difference]: With dead ends: 171 [2020-09-24 20:43:31,950 INFO L226 Difference]: Without dead ends: 158 [2020-09-24 20:43:31,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=1263, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 20:43:31,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-09-24 20:43:31,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 84. [2020-09-24 20:43:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-24 20:43:31,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2020-09-24 20:43:31,960 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 38 [2020-09-24 20:43:31,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:31,961 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2020-09-24 20:43:31,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 20:43:31,961 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2020-09-24 20:43:31,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-24 20:43:31,963 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:31,963 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:31,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 20:43:31,963 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:31,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:31,964 INFO L82 PathProgramCache]: Analyzing trace with hash 182015635, now seen corresponding path program 4 times [2020-09-24 20:43:31,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:31,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616747361] [2020-09-24 20:43:31,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:31,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:31,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:31,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:32,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:32,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:32,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:32,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:33,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:33,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:33,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:33,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:33,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:33,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:33,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-24 20:43:33,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-09-24 20:43:33,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1790 [2020-09-24 20:43:33,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:33,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 20:43:33,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:43:33,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 20:43:33,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:33,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:33,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:33,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:33,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:33,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:33,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:33,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:33,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:33,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616747361] [2020-09-24 20:43:33,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:33,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 20:43:33,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016159104] [2020-09-24 20:43:33,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 20:43:33,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:33,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 20:43:33,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-24 20:43:33,862 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand 12 states. [2020-09-24 20:43:34,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:34,198 INFO L93 Difference]: Finished difference Result 180 states and 198 transitions. [2020-09-24 20:43:34,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 20:43:34,199 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-09-24 20:43:34,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:34,202 INFO L225 Difference]: With dead ends: 180 [2020-09-24 20:43:34,202 INFO L226 Difference]: Without dead ends: 173 [2020-09-24 20:43:34,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2020-09-24 20:43:34,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-24 20:43:34,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 93. [2020-09-24 20:43:34,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-24 20:43:34,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2020-09-24 20:43:34,213 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 40 [2020-09-24 20:43:34,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:34,213 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2020-09-24 20:43:34,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 20:43:34,213 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2020-09-24 20:43:34,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-24 20:43:34,215 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:34,215 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:34,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 20:43:34,215 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:34,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:34,216 INFO L82 PathProgramCache]: Analyzing trace with hash -694207428, now seen corresponding path program 5 times [2020-09-24 20:43:34,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:34,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417777700] [2020-09-24 20:43:34,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:34,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:34,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:34,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:34,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:34,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:34,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:35,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:35,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:35,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:35,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:35,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-24 20:43:35,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 20:43:35,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1195 [2020-09-24 20:43:35,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:35,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 20:43:35,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:43:35,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-24 20:43:35,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:35,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:35,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:35,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:35,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:35,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:35,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:35,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:35,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:35,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:35,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:35,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:35,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417777700] [2020-09-24 20:43:35,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:35,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 20:43:35,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298685731] [2020-09-24 20:43:35,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 20:43:35,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:35,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 20:43:35,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-09-24 20:43:35,535 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand 13 states. [2020-09-24 20:43:36,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:36,109 INFO L93 Difference]: Finished difference Result 190 states and 210 transitions. [2020-09-24 20:43:36,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 20:43:36,110 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-09-24 20:43:36,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:36,112 INFO L225 Difference]: With dead ends: 190 [2020-09-24 20:43:36,112 INFO L226 Difference]: Without dead ends: 174 [2020-09-24 20:43:36,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 20:43:36,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-09-24 20:43:36,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 95. [2020-09-24 20:43:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-24 20:43:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2020-09-24 20:43:36,121 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 42 [2020-09-24 20:43:36,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:36,122 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2020-09-24 20:43:36,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 20:43:36,122 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2020-09-24 20:43:36,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-24 20:43:36,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:36,124 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:36,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 20:43:36,124 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:36,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:36,125 INFO L82 PathProgramCache]: Analyzing trace with hash 875178364, now seen corresponding path program 6 times [2020-09-24 20:43:36,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:36,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301997611] [2020-09-24 20:43:36,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:36,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:36,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:36,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:36,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:36,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:36,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:37,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:37,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:37,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:37,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-24 20:43:37,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 20:43:37,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1777 [2020-09-24 20:43:37,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:37,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 20:43:37,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:43:37,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-24 20:43:37,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:38,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:38,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:38,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:38,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:38,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:38,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:38,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:38,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:38,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:38,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:38,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:38,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301997611] [2020-09-24 20:43:38,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:38,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 20:43:38,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125715233] [2020-09-24 20:43:38,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 20:43:38,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:38,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 20:43:38,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-09-24 20:43:38,048 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand 14 states. [2020-09-24 20:43:39,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:39,167 INFO L93 Difference]: Finished difference Result 162 states and 176 transitions. [2020-09-24 20:43:39,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-24 20:43:39,168 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-09-24 20:43:39,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:39,169 INFO L225 Difference]: With dead ends: 162 [2020-09-24 20:43:39,169 INFO L226 Difference]: Without dead ends: 155 [2020-09-24 20:43:39,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=530, Invalid=1920, Unknown=0, NotChecked=0, Total=2450 [2020-09-24 20:43:39,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-24 20:43:39,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 95. [2020-09-24 20:43:39,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-24 20:43:39,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2020-09-24 20:43:39,184 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 42 [2020-09-24 20:43:39,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:39,189 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2020-09-24 20:43:39,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 20:43:39,190 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2020-09-24 20:43:39,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-24 20:43:39,191 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:39,191 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:39,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 20:43:39,191 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:39,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:39,192 INFO L82 PathProgramCache]: Analyzing trace with hash -736542311, now seen corresponding path program 2 times [2020-09-24 20:43:39,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:39,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464784287] [2020-09-24 20:43:39,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:39,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:39,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:39,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-24 20:43:39,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:39,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-09-24 20:43:39,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:39,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 20:43:39,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:43:39,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-24 20:43:39,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:39,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:39,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:39,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:39,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:39,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:39,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:39,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:39,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:39,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:39,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:39,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:39,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464784287] [2020-09-24 20:43:39,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:39,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 20:43:39,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372915727] [2020-09-24 20:43:39,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 20:43:39,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:39,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 20:43:39,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-24 20:43:39,435 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand 11 states. [2020-09-24 20:43:39,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:39,604 INFO L93 Difference]: Finished difference Result 219 states and 239 transitions. [2020-09-24 20:43:39,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 20:43:39,604 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-09-24 20:43:39,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:39,608 INFO L225 Difference]: With dead ends: 219 [2020-09-24 20:43:39,608 INFO L226 Difference]: Without dead ends: 212 [2020-09-24 20:43:39,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-24 20:43:39,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-24 20:43:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 102. [2020-09-24 20:43:39,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-24 20:43:39,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 113 transitions. [2020-09-24 20:43:39,616 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 113 transitions. Word has length 44 [2020-09-24 20:43:39,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:39,617 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 113 transitions. [2020-09-24 20:43:39,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 20:43:39,617 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 113 transitions. [2020-09-24 20:43:39,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 20:43:39,618 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:39,618 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:39,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 20:43:39,619 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:39,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:39,619 INFO L82 PathProgramCache]: Analyzing trace with hash 2062413923, now seen corresponding path program 7 times [2020-09-24 20:43:39,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:39,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634843256] [2020-09-24 20:43:39,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:39,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:39,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:39,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:39,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:40,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:40,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:40,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:40,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:40,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:41,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:41,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:41,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:41,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:41,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:42,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:42,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:42,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:42,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:43,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:44,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:44,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-24 20:43:44,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-09-24 20:43:44,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4687 [2020-09-24 20:43:44,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:44,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 20:43:44,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:43:44,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-24 20:43:44,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:44,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:44,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:44,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:44,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:44,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:44,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:44,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:44,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:44,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:44,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:44,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:44,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634843256] [2020-09-24 20:43:44,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:44,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 20:43:44,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531371533] [2020-09-24 20:43:44,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 20:43:44,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:44,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 20:43:44,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-09-24 20:43:44,504 INFO L87 Difference]: Start difference. First operand 102 states and 113 transitions. Second operand 16 states. [2020-09-24 20:43:45,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:45,621 INFO L93 Difference]: Finished difference Result 249 states and 274 transitions. [2020-09-24 20:43:45,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-24 20:43:45,622 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-09-24 20:43:45,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:45,625 INFO L225 Difference]: With dead ends: 249 [2020-09-24 20:43:45,625 INFO L226 Difference]: Without dead ends: 236 [2020-09-24 20:43:45,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=464, Invalid=1888, Unknown=0, NotChecked=0, Total=2352 [2020-09-24 20:43:45,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-09-24 20:43:45,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 127. [2020-09-24 20:43:45,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-24 20:43:45,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 141 transitions. [2020-09-24 20:43:45,635 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 141 transitions. Word has length 49 [2020-09-24 20:43:45,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:45,635 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 141 transitions. [2020-09-24 20:43:45,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 20:43:45,636 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 141 transitions. [2020-09-24 20:43:45,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 20:43:45,637 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:45,637 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:45,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 20:43:45,637 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:45,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:45,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1014393853, now seen corresponding path program 8 times [2020-09-24 20:43:45,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:45,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98346863] [2020-09-24 20:43:45,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:45,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:45,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:45,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:45,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:45,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:46,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:46,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:46,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:47,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:47,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:47,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:48,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:48,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:48,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:48,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:49,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:49,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:49,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:49,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:50,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:50,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-24 20:43:50,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-09-24 20:43:50,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-24 20:43:50,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:50,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 20:43:50,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:43:50,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-24 20:43:50,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:50,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:50,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:50,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:50,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:50,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:50,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:50,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:50,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:50,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:50,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:50,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:50,829 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:50,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98346863] [2020-09-24 20:43:50,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:50,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 20:43:50,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981071330] [2020-09-24 20:43:50,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 20:43:50,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:50,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 20:43:50,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-09-24 20:43:50,831 INFO L87 Difference]: Start difference. First operand 127 states and 141 transitions. Second operand 16 states. [2020-09-24 20:43:52,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:52,427 INFO L93 Difference]: Finished difference Result 273 states and 302 transitions. [2020-09-24 20:43:52,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-09-24 20:43:52,428 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-09-24 20:43:52,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:52,431 INFO L225 Difference]: With dead ends: 273 [2020-09-24 20:43:52,431 INFO L226 Difference]: Without dead ends: 260 [2020-09-24 20:43:52,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=622, Invalid=3284, Unknown=0, NotChecked=0, Total=3906 [2020-09-24 20:43:52,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-24 20:43:52,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 164. [2020-09-24 20:43:52,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-24 20:43:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 183 transitions. [2020-09-24 20:43:52,447 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 183 transitions. Word has length 49 [2020-09-24 20:43:52,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:52,447 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 183 transitions. [2020-09-24 20:43:52,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 20:43:52,447 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 183 transitions. [2020-09-24 20:43:52,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 20:43:52,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:52,448 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:52,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 20:43:52,449 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:52,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:52,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2107741888, now seen corresponding path program 9 times [2020-09-24 20:43:52,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:52,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267651593] [2020-09-24 20:43:52,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:52,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:52,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:52,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:53,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:53,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:53,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:53,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:53,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:53,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:53,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:53,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 20:43:53,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 20:43:53,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1141 [2020-09-24 20:43:53,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:53,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 20:43:53,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:43:53,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-24 20:43:53,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:53,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:53,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:53,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:53,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:53,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:53,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:43:53,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:53,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:53,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:53,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:53,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 20:43:53,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267651593] [2020-09-24 20:43:53,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:53,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 20:43:53,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691675514] [2020-09-24 20:43:53,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 20:43:53,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:53,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 20:43:53,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-09-24 20:43:53,764 INFO L87 Difference]: Start difference. First operand 164 states and 183 transitions. Second operand 13 states. [2020-09-24 20:43:54,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:54,090 INFO L93 Difference]: Finished difference Result 386 states and 426 transitions. [2020-09-24 20:43:54,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 20:43:54,090 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-09-24 20:43:54,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:54,092 INFO L225 Difference]: With dead ends: 386 [2020-09-24 20:43:54,092 INFO L226 Difference]: Without dead ends: 376 [2020-09-24 20:43:54,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2020-09-24 20:43:54,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-09-24 20:43:54,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 176. [2020-09-24 20:43:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-24 20:43:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 197 transitions. [2020-09-24 20:43:54,103 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 197 transitions. Word has length 51 [2020-09-24 20:43:54,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:54,103 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 197 transitions. [2020-09-24 20:43:54,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 20:43:54,104 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 197 transitions. [2020-09-24 20:43:54,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 20:43:54,104 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:54,105 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:54,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 20:43:54,105 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:54,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:54,106 INFO L82 PathProgramCache]: Analyzing trace with hash -947870618, now seen corresponding path program 10 times [2020-09-24 20:43:54,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:54,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060128369] [2020-09-24 20:43:54,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:54,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:54,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:54,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:54,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:54,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:54,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:55,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:55,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:55,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:55,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:55,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:56,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:56,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 20:43:56,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 20:43:56,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1982 [2020-09-24 20:43:56,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:56,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 20:43:56,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:43:56,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-24 20:43:56,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:43:56,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:43:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:56,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:56,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:43:56,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:43:56,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:43:56,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:43:56,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:43:56,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:43:56,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:43:56,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:43:56,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:43:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:43:56,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060128369] [2020-09-24 20:43:56,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:43:56,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 20:43:56,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449662986] [2020-09-24 20:43:56,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 20:43:56,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:43:56,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 20:43:56,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-09-24 20:43:56,290 INFO L87 Difference]: Start difference. First operand 176 states and 197 transitions. Second operand 16 states. [2020-09-24 20:43:57,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:43:57,161 INFO L93 Difference]: Finished difference Result 363 states and 398 transitions. [2020-09-24 20:43:57,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 20:43:57,162 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-09-24 20:43:57,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:43:57,164 INFO L225 Difference]: With dead ends: 363 [2020-09-24 20:43:57,164 INFO L226 Difference]: Without dead ends: 356 [2020-09-24 20:43:57,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=394, Invalid=1768, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 20:43:57,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-09-24 20:43:57,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 176. [2020-09-24 20:43:57,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-24 20:43:57,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 197 transitions. [2020-09-24 20:43:57,175 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 197 transitions. Word has length 51 [2020-09-24 20:43:57,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:43:57,176 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 197 transitions. [2020-09-24 20:43:57,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 20:43:57,176 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 197 transitions. [2020-09-24 20:43:57,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 20:43:57,177 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:43:57,177 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:43:57,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 20:43:57,177 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:43:57,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:43:57,178 INFO L82 PathProgramCache]: Analyzing trace with hash 621515174, now seen corresponding path program 11 times [2020-09-24 20:43:57,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:43:57,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142124856] [2020-09-24 20:43:57,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:43:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:43:57,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:57,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:57,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:57,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:57,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:58,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:59,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:43:59,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:00,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:00,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:01,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:01,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 20:44:01,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 20:44:01,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4775 [2020-09-24 20:44:01,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:01,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 20:44:01,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:44:01,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-24 20:44:01,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:02,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:44:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:02,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:02,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:02,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:44:02,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:02,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:44:02,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:02,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:44:02,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:02,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:44:02,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:44:02,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142124856] [2020-09-24 20:44:02,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:44:02,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 20:44:02,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679579592] [2020-09-24 20:44:02,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 20:44:02,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:44:02,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 20:44:02,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:44:02,120 INFO L87 Difference]: Start difference. First operand 176 states and 197 transitions. Second operand 15 states. [2020-09-24 20:44:03,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:44:03,348 INFO L93 Difference]: Finished difference Result 292 states and 320 transitions. [2020-09-24 20:44:03,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-24 20:44:03,349 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-09-24 20:44:03,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:44:03,351 INFO L225 Difference]: With dead ends: 292 [2020-09-24 20:44:03,351 INFO L226 Difference]: Without dead ends: 285 [2020-09-24 20:44:03,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=622, Invalid=2134, Unknown=0, NotChecked=0, Total=2756 [2020-09-24 20:44:03,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-09-24 20:44:03,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 176. [2020-09-24 20:44:03,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-24 20:44:03,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 197 transitions. [2020-09-24 20:44:03,361 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 197 transitions. Word has length 51 [2020-09-24 20:44:03,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:44:03,362 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 197 transitions. [2020-09-24 20:44:03,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 20:44:03,362 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 197 transitions. [2020-09-24 20:44:03,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 20:44:03,363 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:44:03,363 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:44:03,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 20:44:03,363 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:44:03,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:44:03,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1503424832, now seen corresponding path program 12 times [2020-09-24 20:44:03,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:44:03,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001572536] [2020-09-24 20:44:03,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:44:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:03,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:03,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:03,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:03,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:03,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:03,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:04,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:05,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:06,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:08,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:08,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 20:44:08,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 20:44:08,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 20:44:08,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:08,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 20:44:08,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:44:08,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-24 20:44:08,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:08,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:44:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:08,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:08,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:08,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:44:08,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:08,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:44:08,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:08,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:44:08,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:08,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:44:08,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:44:08,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001572536] [2020-09-24 20:44:08,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:44:08,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 20:44:08,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265469882] [2020-09-24 20:44:08,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 20:44:08,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:44:08,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 20:44:08,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-09-24 20:44:08,551 INFO L87 Difference]: Start difference. First operand 176 states and 197 transitions. Second operand 16 states. [2020-09-24 20:44:10,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:44:10,931 INFO L93 Difference]: Finished difference Result 390 states and 427 transitions. [2020-09-24 20:44:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-09-24 20:44:10,932 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-09-24 20:44:10,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:44:10,934 INFO L225 Difference]: With dead ends: 390 [2020-09-24 20:44:10,934 INFO L226 Difference]: Without dead ends: 380 [2020-09-24 20:44:10,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1301, Invalid=5341, Unknown=0, NotChecked=0, Total=6642 [2020-09-24 20:44:10,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-09-24 20:44:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 201. [2020-09-24 20:44:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-09-24 20:44:10,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 225 transitions. [2020-09-24 20:44:10,948 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 225 transitions. Word has length 51 [2020-09-24 20:44:10,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:44:10,948 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 225 transitions. [2020-09-24 20:44:10,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 20:44:10,948 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 225 transitions. [2020-09-24 20:44:10,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-24 20:44:10,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:44:10,949 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:44:10,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 20:44:10,950 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:44:10,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:44:10,950 INFO L82 PathProgramCache]: Analyzing trace with hash 306267971, now seen corresponding path program 3 times [2020-09-24 20:44:10,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:44:10,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303669116] [2020-09-24 20:44:10,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:44:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:10,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:11,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:11,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-24 20:44:11,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:11,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-09-24 20:44:11,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:11,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 20:44:11,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 20:44:11,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 20:44:11,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:11,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:44:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:11,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:11,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:44:11,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:44:11,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:44:11,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:44:11,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:44:11,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:44:11,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:44:11,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:44:11,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:44:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:44:11,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303669116] [2020-09-24 20:44:11,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:44:11,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 20:44:11,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704433291] [2020-09-24 20:44:11,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 20:44:11,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:44:11,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 20:44:11,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-24 20:44:11,293 INFO L87 Difference]: Start difference. First operand 201 states and 225 transitions. Second operand 12 states. [2020-09-24 20:44:11,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:44:11,484 INFO L93 Difference]: Finished difference Result 459 states and 505 transitions. [2020-09-24 20:44:11,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 20:44:11,485 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-09-24 20:44:11,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:44:11,487 INFO L225 Difference]: With dead ends: 459 [2020-09-24 20:44:11,487 INFO L226 Difference]: Without dead ends: 452 [2020-09-24 20:44:11,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-24 20:44:11,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-09-24 20:44:11,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 217. [2020-09-24 20:44:11,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-09-24 20:44:11,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 243 transitions. [2020-09-24 20:44:11,500 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 243 transitions. Word has length 53 [2020-09-24 20:44:11,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:44:11,500 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 243 transitions. [2020-09-24 20:44:11,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 20:44:11,500 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 243 transitions. [2020-09-24 20:44:11,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 20:44:11,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:44:11,501 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:44:11,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 20:44:11,502 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:44:11,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:44:11,502 INFO L82 PathProgramCache]: Analyzing trace with hash -2145852167, now seen corresponding path program 13 times [2020-09-24 20:44:11,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:44:11,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081468675] [2020-09-24 20:44:11,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:44:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:44:11,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:11,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:11,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:44:11,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking...