/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init6_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:58:57,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:58:57,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:58:57,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:58:57,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:58:57,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:58:57,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:58:57,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:58:57,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:58:57,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:58:57,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:58:57,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:58:57,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:58:57,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:58:57,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:58:57,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:58:57,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:58:57,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:58:57,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:58:57,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:58:57,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:58:57,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:58:57,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:58:57,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:58:57,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:58:57,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:58:57,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:58:57,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:58:57,279 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:58:57,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:58:57,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:58:57,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:58:57,285 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:58:57,285 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:58:57,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:58:57,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:58:57,290 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:58:57,291 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:58:57,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:58:57,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:58:57,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:58:57,293 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 09:58:57,333 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:58:57,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:58:57,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:58:57,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:58:57,335 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:58:57,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:58:57,336 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:58:57,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:58:57,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:58:57,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:58:57,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:58:57,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:58:57,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:58:57,338 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:58:57,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:58:57,339 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:58:57,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:58:57,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:58:57,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:58:57,340 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:58:57,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:58:57,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:58:57,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:58:57,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:58:57,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:58:57,341 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:58:57,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:58:57,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:58:57,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:58:57,341 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 09:58:57,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:58:57,678 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:58:57,681 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:58:57,683 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:58:57,683 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:58:57,684 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_ground-1.i [2020-10-12 09:58:57,744 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6277b67c6/39ebaa5f51fe4b9a9cc5009d7fcaef2a/FLAG9828da5b8 [2020-10-12 09:58:58,177 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:58:58,178 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init6_ground-1.i [2020-10-12 09:58:58,185 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6277b67c6/39ebaa5f51fe4b9a9cc5009d7fcaef2a/FLAG9828da5b8 [2020-10-12 09:58:58,581 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6277b67c6/39ebaa5f51fe4b9a9cc5009d7fcaef2a [2020-10-12 09:58:58,591 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:58:58,592 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:58:58,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:58:58,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:58:58,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:58:58,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:58:58" (1/1) ... [2020-10-12 09:58:58,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e3a7124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:58, skipping insertion in model container [2020-10-12 09:58:58,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:58:58" (1/1) ... [2020-10-12 09:58:58,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:58:58,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:58:58,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:58:58,808 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:58:58,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:58:58,850 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:58:58,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:58 WrapperNode [2020-10-12 09:58:58,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:58:58,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:58:58,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:58:58,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:58:58,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:58" (1/1) ... [2020-10-12 09:58:58,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:58" (1/1) ... [2020-10-12 09:58:58,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:58" (1/1) ... [2020-10-12 09:58:58,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:58" (1/1) ... [2020-10-12 09:58:58,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:58" (1/1) ... [2020-10-12 09:58:58,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:58" (1/1) ... [2020-10-12 09:58:58,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:58" (1/1) ... [2020-10-12 09:58:58,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:58:58,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:58:58,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:58:58,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:58:58,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:58:59,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:58:59,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:58:59,053 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:58:59,053 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:58:59,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:58:59,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:58:59,053 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:58:59,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:58:59,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:58:59,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:58:59,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:58:59,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:58:59,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:58:59,403 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:58:59,403 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-12 09:58:59,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:58:59 BoogieIcfgContainer [2020-10-12 09:58:59,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:58:59,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:58:59,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:58:59,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:58:59,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:58:58" (1/3) ... [2020-10-12 09:58:59,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23d245c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:58:59, skipping insertion in model container [2020-10-12 09:58:59,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:58:58" (2/3) ... [2020-10-12 09:58:59,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23d245c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:58:59, skipping insertion in model container [2020-10-12 09:58:59,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:58:59" (3/3) ... [2020-10-12 09:58:59,415 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-1.i [2020-10-12 09:58:59,428 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:58:59,435 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:58:59,450 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:58:59,479 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:58:59,480 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:58:59,480 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:58:59,480 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:58:59,480 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:58:59,480 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:58:59,481 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:58:59,481 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:58:59,500 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-12 09:58:59,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 09:58:59,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:59,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:59,508 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:59,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:59,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1058720290, now seen corresponding path program 1 times [2020-10-12 09:58:59,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:59,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232559008] [2020-10-12 09:58:59,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:59,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:59,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:59,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:59,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:59,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:59,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:00,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:00,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 09:59:00,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:00,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 732 [2020-10-12 09:59:00,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:00,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:59:00,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:59:00,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:59:00,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 09:59:00,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:00,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:00,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:00,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:00,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:00,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:59:00,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:00,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:00,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:00,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:00,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 09:59:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:59:00,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232559008] [2020-10-12 09:59:00,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:59:00,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:59:00,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375087067] [2020-10-12 09:59:00,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:59:00,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:00,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:59:00,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:59:00,522 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-10-12 09:59:00,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:00,690 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2020-10-12 09:59:00,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:59:00,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-12 09:59:00,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:00,702 INFO L225 Difference]: With dead ends: 65 [2020-10-12 09:59:00,702 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 09:59:00,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:59:00,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 09:59:00,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-12 09:59:00,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-12 09:59:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-10-12 09:59:00,750 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2020-10-12 09:59:00,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:00,751 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-10-12 09:59:00,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:59:00,751 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-10-12 09:59:00,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 09:59:00,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:00,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:00,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:59:00,754 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:00,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:00,754 INFO L82 PathProgramCache]: Analyzing trace with hash -2002754829, now seen corresponding path program 1 times [2020-10-12 09:59:00,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:00,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840790703] [2020-10-12 09:59:00,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:00,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:00,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:00,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:00,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:00,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:00,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:05,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:05,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 09:59:05,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:05,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:59:05,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:05,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:59:05,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-12 09:59:05,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 09:59:05,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:05,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:05,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:05,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:05,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:05,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:05,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:59:05,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:05,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:05,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:05,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:05,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-12 09:59:05,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840790703] [2020-10-12 09:59:05,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:05,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 09:59:05,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590486125] [2020-10-12 09:59:05,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:59:05,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:05,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:59:05,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:59:05,819 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 5 states. [2020-10-12 09:59:05,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:05,945 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2020-10-12 09:59:05,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:59:05,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-12 09:59:05,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:05,947 INFO L225 Difference]: With dead ends: 66 [2020-10-12 09:59:05,947 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 09:59:05,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:59:05,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 09:59:05,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-12 09:59:05,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 09:59:05,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-12 09:59:05,959 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 29 [2020-10-12 09:59:05,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:05,959 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-12 09:59:05,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:59:05,960 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-12 09:59:05,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 09:59:05,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:05,963 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:05,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:59:05,964 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:05,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:05,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1979990410, now seen corresponding path program 2 times [2020-10-12 09:59:05,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:05,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488798174] [2020-10-12 09:59:05,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:05,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:06,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:06,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:06,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:06,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:06,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:10,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:10,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 09:59:10,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:10,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:59:10,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:10,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:59:10,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 09:59:10,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:59:10,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:11,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:11,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:11,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:11,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:11,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:11,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:59:11,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:11,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:11,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:11,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:11,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 09:59:11,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488798174] [2020-10-12 09:59:11,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:11,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:59:11,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378576992] [2020-10-12 09:59:11,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:59:11,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:11,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:59:11,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:59:11,053 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2020-10-12 09:59:11,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:11,213 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2020-10-12 09:59:11,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:59:11,213 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-12 09:59:11,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:11,215 INFO L225 Difference]: With dead ends: 77 [2020-10-12 09:59:11,215 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 09:59:11,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:59:11,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 09:59:11,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-12 09:59:11,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 09:59:11,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-12 09:59:11,225 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 35 [2020-10-12 09:59:11,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:11,225 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-12 09:59:11,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:59:11,226 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-12 09:59:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 09:59:11,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:11,227 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:11,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:59:11,228 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:11,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:11,228 INFO L82 PathProgramCache]: Analyzing trace with hash 682352339, now seen corresponding path program 3 times [2020-10-12 09:59:11,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:11,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96208177] [2020-10-12 09:59:11,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:11,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:11,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:11,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:11,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:11,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:12,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:16,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:16,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 09:59:16,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:16,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:59:16,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:16,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:59:16,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 09:59:16,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 09:59:16,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 09:59:16,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:16,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:16,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:16,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:16,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:16,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:59:16,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:16,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:16,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:16,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:16,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-12 09:59:16,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96208177] [2020-10-12 09:59:16,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:16,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 09:59:16,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986460375] [2020-10-12 09:59:16,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:59:16,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:16,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:59:16,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:59:16,326 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 7 states. [2020-10-12 09:59:16,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:16,504 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2020-10-12 09:59:16,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:59:16,505 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-10-12 09:59:16,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:16,507 INFO L225 Difference]: With dead ends: 88 [2020-10-12 09:59:16,508 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 09:59:16,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:59:16,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 09:59:16,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-12 09:59:16,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 09:59:16,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-10-12 09:59:16,524 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 41 [2020-10-12 09:59:16,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:16,524 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-10-12 09:59:16,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:59:16,525 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-10-12 09:59:16,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 09:59:16,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:16,527 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:16,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:59:16,528 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:16,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:16,528 INFO L82 PathProgramCache]: Analyzing trace with hash -411261930, now seen corresponding path program 4 times [2020-10-12 09:59:16,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:16,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517669437] [2020-10-12 09:59:16,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:16,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:16,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:16,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:16,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:16,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:21,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:21,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 09:59:21,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:59:21,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:59:21,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:21,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:59:21,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 09:59:21,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:59:21,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:21,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:21,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:21,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:21,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:21,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:21,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:21,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:21,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:21,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:21,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:21,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-12 09:59:21,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517669437] [2020-10-12 09:59:21,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:21,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:59:21,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121058848] [2020-10-12 09:59:21,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:59:21,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:21,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:59:21,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:59:21,624 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 8 states. [2020-10-12 09:59:21,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:21,776 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2020-10-12 09:59:21,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:59:21,776 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-10-12 09:59:21,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:21,777 INFO L225 Difference]: With dead ends: 99 [2020-10-12 09:59:21,777 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 09:59:21,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:59:21,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 09:59:21,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-12 09:59:21,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 09:59:21,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-10-12 09:59:21,787 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 47 [2020-10-12 09:59:21,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:21,787 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-10-12 09:59:21,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:59:21,788 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-10-12 09:59:21,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 09:59:21,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:21,789 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:21,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:59:21,789 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:21,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:21,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1179573581, now seen corresponding path program 5 times [2020-10-12 09:59:21,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:21,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583494528] [2020-10-12 09:59:21,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:21,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:21,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:21,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:21,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:21,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:26,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:26,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 09:59:26,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:59:26,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:59:26,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:26,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:59:26,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-12 09:59:26,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:59:26,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:26,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:26,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:26,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:26,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:26,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:26,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:59:26,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:26,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:26,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:26,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:26,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-12 09:59:26,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583494528] [2020-10-12 09:59:26,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:26,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:59:26,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849193213] [2020-10-12 09:59:26,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:59:26,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:26,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:59:26,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:59:26,882 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 9 states. [2020-10-12 09:59:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:27,043 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2020-10-12 09:59:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:59:27,044 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-10-12 09:59:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:27,045 INFO L225 Difference]: With dead ends: 110 [2020-10-12 09:59:27,045 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 09:59:27,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:59:27,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 09:59:27,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-12 09:59:27,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 09:59:27,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-10-12 09:59:27,053 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 53 [2020-10-12 09:59:27,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:27,054 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-10-12 09:59:27,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:59:27,054 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-10-12 09:59:27,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 09:59:27,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:27,055 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:27,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:59:27,056 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:27,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:27,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1766162870, now seen corresponding path program 6 times [2020-10-12 09:59:27,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:27,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557370421] [2020-10-12 09:59:27,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:27,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:27,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:27,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:27,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:27,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:32,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:32,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 09:59:32,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:59:32,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:59:32,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:32,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:59:32,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-12 09:59:32,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:59:32,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:32,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:32,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:32,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:32,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:32,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:32,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:32,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:32,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:32,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:32,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:32,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-12 09:59:32,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557370421] [2020-10-12 09:59:32,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:32,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:59:32,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386012003] [2020-10-12 09:59:32,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:59:32,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:32,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:59:32,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:59:32,161 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 10 states. [2020-10-12 09:59:32,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:32,372 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2020-10-12 09:59:32,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:59:32,373 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-12 09:59:32,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:32,374 INFO L225 Difference]: With dead ends: 121 [2020-10-12 09:59:32,374 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 09:59:32,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:59:32,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 09:59:32,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-12 09:59:32,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 09:59:32,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-10-12 09:59:32,382 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 59 [2020-10-12 09:59:32,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:32,382 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-10-12 09:59:32,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:59:32,383 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-10-12 09:59:32,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 09:59:32,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:32,384 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:32,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:59:32,384 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:32,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:32,385 INFO L82 PathProgramCache]: Analyzing trace with hash 728903315, now seen corresponding path program 7 times [2020-10-12 09:59:32,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:32,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357334746] [2020-10-12 09:59:32,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:32,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:32,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:32,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:32,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:33,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:37,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:37,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 09:59:37,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:59:37,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:59:37,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:37,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:59:37,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 09:59:37,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 09:59:37,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:37,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:37,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:37,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:37,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:37,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:37,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:37,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:37,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:37,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:37,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:37,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-12 09:59:37,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357334746] [2020-10-12 09:59:37,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:37,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:59:37,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395293014] [2020-10-12 09:59:37,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:59:37,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:37,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:59:37,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:59:37,527 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 11 states. [2020-10-12 09:59:37,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:37,749 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2020-10-12 09:59:37,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:59:37,750 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2020-10-12 09:59:37,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:37,751 INFO L225 Difference]: With dead ends: 132 [2020-10-12 09:59:37,751 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 09:59:37,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:59:37,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 09:59:37,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-12 09:59:37,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 09:59:37,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-10-12 09:59:37,760 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2020-10-12 09:59:37,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:37,760 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-10-12 09:59:37,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:59:37,760 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-10-12 09:59:37,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 09:59:37,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:37,762 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:37,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:59:37,762 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:37,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:37,762 INFO L82 PathProgramCache]: Analyzing trace with hash -688629930, now seen corresponding path program 8 times [2020-10-12 09:59:37,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:37,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092938880] [2020-10-12 09:59:37,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:37,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:37,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:37,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:37,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:38,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:42,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:42,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 09:59:42,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:59:42,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 09:59:42,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:42,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:59:42,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 09:59:42,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:59:42,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:42,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:42,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:42,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:42,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:42,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:42,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:42,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:42,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:42,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:42,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:42,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-12 09:59:42,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092938880] [2020-10-12 09:59:42,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:42,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:59:42,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207949340] [2020-10-12 09:59:42,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:59:42,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:42,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:59:42,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:59:42,880 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 12 states. [2020-10-12 09:59:43,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:43,112 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2020-10-12 09:59:43,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:59:43,113 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-10-12 09:59:43,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:43,114 INFO L225 Difference]: With dead ends: 143 [2020-10-12 09:59:43,114 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 09:59:43,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:59:43,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 09:59:43,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-12 09:59:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-12 09:59:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2020-10-12 09:59:43,126 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 71 [2020-10-12 09:59:43,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:43,127 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2020-10-12 09:59:43,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:59:43,127 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2020-10-12 09:59:43,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 09:59:43,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:43,128 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:43,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:59:43,129 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:43,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1278280307, now seen corresponding path program 9 times [2020-10-12 09:59:43,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:43,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920399357] [2020-10-12 09:59:43,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:43,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:43,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:43,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:43,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:44,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:48,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:48,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 09:59:48,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:59:48,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 09:59:48,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:48,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:59:48,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-12 09:59:48,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 09:59:48,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:48,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:48,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:48,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:48,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:48,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:48,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:48,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:48,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:48,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:48,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:48,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-12 09:59:48,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920399357] [2020-10-12 09:59:48,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:48,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:59:48,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22316110] [2020-10-12 09:59:48,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:59:48,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:48,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:59:48,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:59:48,264 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand 13 states. [2020-10-12 09:59:48,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:48,477 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2020-10-12 09:59:48,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:59:48,477 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-10-12 09:59:48,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:48,478 INFO L225 Difference]: With dead ends: 154 [2020-10-12 09:59:48,479 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 09:59:48,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:59:48,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 09:59:48,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-12 09:59:48,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 09:59:48,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2020-10-12 09:59:48,488 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 77 [2020-10-12 09:59:48,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:48,489 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2020-10-12 09:59:48,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:59:48,489 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2020-10-12 09:59:48,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 09:59:48,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:48,490 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:48,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:59:48,491 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:48,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:48,491 INFO L82 PathProgramCache]: Analyzing trace with hash -106486538, now seen corresponding path program 10 times [2020-10-12 09:59:48,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:48,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884479059] [2020-10-12 09:59:48,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:48,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:48,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:48,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:48,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:49,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:53,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:53,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 09:59:53,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:59:53,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:59:53,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:53,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:59:53,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:53,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 09:59:53,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:53,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:53,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:53,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:53,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:53,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:53,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:53,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:53,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:53,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:53,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:53,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-10-12 09:59:53,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884479059] [2020-10-12 09:59:53,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:53,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:59:53,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876222712] [2020-10-12 09:59:53,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:59:53,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:53,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:59:53,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:59:53,647 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand 14 states. [2020-10-12 09:59:53,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:53,856 INFO L93 Difference]: Finished difference Result 165 states and 182 transitions. [2020-10-12 09:59:53,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:59:53,856 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 83 [2020-10-12 09:59:53,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:53,857 INFO L225 Difference]: With dead ends: 165 [2020-10-12 09:59:53,858 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 09:59:53,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:59:53,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 09:59:53,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-12 09:59:53,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-12 09:59:53,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2020-10-12 09:59:53,868 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 83 [2020-10-12 09:59:53,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:53,868 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2020-10-12 09:59:53,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:59:53,868 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2020-10-12 09:59:53,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-12 09:59:53,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:53,869 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:53,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:59:53,870 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:53,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:53,870 INFO L82 PathProgramCache]: Analyzing trace with hash -391143853, now seen corresponding path program 11 times [2020-10-12 09:59:53,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:53,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724680001] [2020-10-12 09:59:53,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:53,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:53,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:53,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:53,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:55,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:58,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:58,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-12 09:59:58,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:59:58,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:59:58,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:58,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:59:58,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 09:59:58,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 09:59:58,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:59,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:59,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:59,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:59,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:59,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:59,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:59,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:59,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:59,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:59,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:59,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-12 09:59:59,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724680001] [2020-10-12 09:59:59,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:59,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:59:59,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942084119] [2020-10-12 09:59:59,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:59:59,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:59,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:59:59,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:59:59,062 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand 15 states. [2020-10-12 09:59:59,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:59,395 INFO L93 Difference]: Finished difference Result 176 states and 193 transitions. [2020-10-12 09:59:59,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:59:59,396 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 89 [2020-10-12 09:59:59,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:59,398 INFO L225 Difference]: With dead ends: 176 [2020-10-12 09:59:59,399 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 09:59:59,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:59:59,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 09:59:59,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-12 09:59:59,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-12 09:59:59,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2020-10-12 09:59:59,424 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 89 [2020-10-12 09:59:59,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:59,425 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2020-10-12 09:59:59,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:59:59,427 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2020-10-12 09:59:59,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-12 09:59:59,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:59,428 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:59,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:59:59,429 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:59,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:59,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2080107158, now seen corresponding path program 12 times [2020-10-12 09:59:59,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:59,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669375774] [2020-10-12 09:59:59,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:59,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:59,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:59,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:59,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:02,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:04,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:04,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-12 10:00:04,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:00:04,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 10:00:04,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:04,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:00:04,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:00:04,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 10:00:04,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:04,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:04,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:04,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:04,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:04,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:04,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:04,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:04,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:04,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:04,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:04,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:00:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-10-12 10:00:04,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669375774] [2020-10-12 10:00:04,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:04,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:00:04,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068882031] [2020-10-12 10:00:04,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:00:04,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:04,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:00:04,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:00:04,620 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand 16 states. [2020-10-12 10:00:04,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:04,906 INFO L93 Difference]: Finished difference Result 187 states and 204 transitions. [2020-10-12 10:00:04,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:00:04,906 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 95 [2020-10-12 10:00:04,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:04,907 INFO L225 Difference]: With dead ends: 187 [2020-10-12 10:00:04,908 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 10:00:04,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:00:04,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 10:00:04,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-12 10:00:04,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-12 10:00:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 112 transitions. [2020-10-12 10:00:04,926 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 112 transitions. Word has length 95 [2020-10-12 10:00:04,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:04,926 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 112 transitions. [2020-10-12 10:00:04,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:00:04,926 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 112 transitions. [2020-10-12 10:00:04,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-12 10:00:04,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:04,928 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:04,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:00:04,928 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:04,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:04,928 INFO L82 PathProgramCache]: Analyzing trace with hash -332398029, now seen corresponding path program 13 times [2020-10-12 10:00:04,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:04,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989303767] [2020-10-12 10:00:04,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:04,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:04,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:05,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:05,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:07,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:09,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:09,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-12 10:00:09,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:00:09,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 10:00:09,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:09,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:00:09,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-12 10:00:09,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:00:09,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:10,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:10,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:10,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:10,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:10,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:10,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:10,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:10,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:10,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:10,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:10,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2020-10-12 10:00:10,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989303767] [2020-10-12 10:00:10,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:10,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:00:10,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338643066] [2020-10-12 10:00:10,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:00:10,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:10,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:00:10,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:00:10,136 INFO L87 Difference]: Start difference. First operand 106 states and 112 transitions. Second operand 17 states. [2020-10-12 10:00:10,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:10,353 INFO L93 Difference]: Finished difference Result 198 states and 215 transitions. [2020-10-12 10:00:10,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 10:00:10,354 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 101 [2020-10-12 10:00:10,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:10,355 INFO L225 Difference]: With dead ends: 198 [2020-10-12 10:00:10,355 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 10:00:10,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:00:10,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 10:00:10,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-12 10:00:10,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-12 10:00:10,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2020-10-12 10:00:10,364 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 101 [2020-10-12 10:00:10,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:10,364 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2020-10-12 10:00:10,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:00:10,364 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2020-10-12 10:00:10,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-12 10:00:10,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:10,366 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:10,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:00:10,366 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:10,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:10,366 INFO L82 PathProgramCache]: Analyzing trace with hash -904878026, now seen corresponding path program 14 times [2020-10-12 10:00:10,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:10,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479389248] [2020-10-12 10:00:10,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:10,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:10,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:10,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:10,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:14,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:15,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:15,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-12 10:00:15,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:00:15,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 10:00:15,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:15,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:00:15,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-12 10:00:15,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 10:00:15,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:15,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:15,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:15,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:15,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:15,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:15,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:15,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:15,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:15,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:15,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:15,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2020-10-12 10:00:15,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479389248] [2020-10-12 10:00:15,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:15,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:00:15,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132688634] [2020-10-12 10:00:15,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:00:15,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:15,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:00:15,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:00:15,582 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand 18 states. [2020-10-12 10:00:15,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:15,878 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2020-10-12 10:00:15,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:00:15,879 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 107 [2020-10-12 10:00:15,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:15,880 INFO L225 Difference]: With dead ends: 209 [2020-10-12 10:00:15,880 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 10:00:15,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:00:15,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 10:00:15,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-12 10:00:15,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-12 10:00:15,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2020-10-12 10:00:15,888 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 107 [2020-10-12 10:00:15,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:15,889 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2020-10-12 10:00:15,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:00:15,889 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2020-10-12 10:00:15,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-12 10:00:15,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:15,890 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:15,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:00:15,891 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:15,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:15,891 INFO L82 PathProgramCache]: Analyzing trace with hash -2139869677, now seen corresponding path program 15 times [2020-10-12 10:00:15,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:15,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043220237] [2020-10-12 10:00:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:15,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:15,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:15,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:16,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:20,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:20,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:20,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-12 10:00:20,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:00:20,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 10:00:20,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:20,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:00:20,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:00:20,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 10:00:20,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:21,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:21,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:21,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:21,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:21,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:21,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:21,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:21,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:21,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:21,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:21,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-12 10:00:21,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043220237] [2020-10-12 10:00:21,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:21,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:00:21,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751930273] [2020-10-12 10:00:21,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:00:21,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:21,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:00:21,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:00:21,116 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand 19 states. [2020-10-12 10:00:21,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:21,419 INFO L93 Difference]: Finished difference Result 220 states and 237 transitions. [2020-10-12 10:00:21,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:00:21,420 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 113 [2020-10-12 10:00:21,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:21,421 INFO L225 Difference]: With dead ends: 220 [2020-10-12 10:00:21,421 INFO L226 Difference]: Without dead ends: 124 [2020-10-12 10:00:21,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:00:21,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-12 10:00:21,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-12 10:00:21,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-12 10:00:21,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2020-10-12 10:00:21,437 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 113 [2020-10-12 10:00:21,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:21,438 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2020-10-12 10:00:21,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:00:21,438 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2020-10-12 10:00:21,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-12 10:00:21,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:21,440 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:21,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:00:21,440 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:21,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:21,441 INFO L82 PathProgramCache]: Analyzing trace with hash -243049002, now seen corresponding path program 16 times [2020-10-12 10:00:21,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:21,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897274855] [2020-10-12 10:00:21,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:21,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:21,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:21,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:21,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:26,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:26,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-12 10:00:26,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:00:26,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 10:00:26,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:26,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:00:26,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-12 10:00:26,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 10:00:26,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:26,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:26,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:26,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:26,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:26,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:26,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:26,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:26,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:26,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:26,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:26,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2020-10-12 10:00:26,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897274855] [2020-10-12 10:00:26,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:26,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:00:26,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828881801] [2020-10-12 10:00:26,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:00:26,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:26,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:00:26,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:00:26,679 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand 20 states. [2020-10-12 10:00:26,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:26,995 INFO L93 Difference]: Finished difference Result 231 states and 248 transitions. [2020-10-12 10:00:26,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:00:26,995 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2020-10-12 10:00:26,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:26,997 INFO L225 Difference]: With dead ends: 231 [2020-10-12 10:00:26,997 INFO L226 Difference]: Without dead ends: 130 [2020-10-12 10:00:26,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:00:26,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-12 10:00:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-12 10:00:27,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-12 10:00:27,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 136 transitions. [2020-10-12 10:00:27,005 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 136 transitions. Word has length 119 [2020-10-12 10:00:27,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:27,005 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 136 transitions. [2020-10-12 10:00:27,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:00:27,006 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 136 transitions. [2020-10-12 10:00:27,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-12 10:00:27,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:27,007 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:27,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:00:27,007 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:27,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:27,008 INFO L82 PathProgramCache]: Analyzing trace with hash 767435251, now seen corresponding path program 17 times [2020-10-12 10:00:27,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:27,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261805105] [2020-10-12 10:00:27,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:27,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:27,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:27,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:27,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:32,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:32,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-12 10:00:32,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:00:32,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 10:00:32,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:32,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:00:32,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 10:00:32,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 10:00:32,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:32,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:32,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:32,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:32,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:32,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:32,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:32,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:32,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:32,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:32,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:32,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:32,260 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 765 trivial. 0 not checked. [2020-10-12 10:00:32,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261805105] [2020-10-12 10:00:32,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:32,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:00:32,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122436601] [2020-10-12 10:00:32,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:00:32,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:32,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:00:32,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:00:32,263 INFO L87 Difference]: Start difference. First operand 130 states and 136 transitions. Second operand 21 states. [2020-10-12 10:00:32,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:32,569 INFO L93 Difference]: Finished difference Result 242 states and 259 transitions. [2020-10-12 10:00:32,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 10:00:32,570 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 125 [2020-10-12 10:00:32,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:32,572 INFO L225 Difference]: With dead ends: 242 [2020-10-12 10:00:32,572 INFO L226 Difference]: Without dead ends: 136 [2020-10-12 10:00:32,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:00:32,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-12 10:00:32,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-12 10:00:32,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-12 10:00:32,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 142 transitions. [2020-10-12 10:00:32,580 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 142 transitions. Word has length 125 [2020-10-12 10:00:32,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:32,580 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 142 transitions. [2020-10-12 10:00:32,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:00:32,581 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 142 transitions. [2020-10-12 10:00:32,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-12 10:00:32,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:32,582 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:32,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:00:32,582 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:32,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:32,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2123232394, now seen corresponding path program 18 times [2020-10-12 10:00:32,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:32,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307344879] [2020-10-12 10:00:32,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:32,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:32,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:32,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:32,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:37,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:37,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-12 10:00:37,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:00:37,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 10:00:37,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:37,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:00:37,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-12 10:00:37,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 10:00:37,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:37,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:37,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:37,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:37,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:37,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:37,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:37,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:37,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:37,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:37,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:37,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-10-12 10:00:37,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307344879] [2020-10-12 10:00:37,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:37,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:00:37,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075199705] [2020-10-12 10:00:37,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:00:37,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:37,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:00:37,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:00:37,876 INFO L87 Difference]: Start difference. First operand 136 states and 142 transitions. Second operand 22 states. [2020-10-12 10:00:38,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:38,214 INFO L93 Difference]: Finished difference Result 253 states and 270 transitions. [2020-10-12 10:00:38,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:00:38,214 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 131 [2020-10-12 10:00:38,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:38,215 INFO L225 Difference]: With dead ends: 253 [2020-10-12 10:00:38,215 INFO L226 Difference]: Without dead ends: 142 [2020-10-12 10:00:38,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:00:38,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-12 10:00:38,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-12 10:00:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-12 10:00:38,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 148 transitions. [2020-10-12 10:00:38,223 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 148 transitions. Word has length 131 [2020-10-12 10:00:38,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:38,223 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 148 transitions. [2020-10-12 10:00:38,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:00:38,223 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 148 transitions. [2020-10-12 10:00:38,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-12 10:00:38,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:38,225 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:38,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:00:38,225 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:38,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:38,226 INFO L82 PathProgramCache]: Analyzing trace with hash -87040557, now seen corresponding path program 19 times [2020-10-12 10:00:38,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:38,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296482626] [2020-10-12 10:00:38,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:38,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:38,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:38,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:38,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:43,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:43,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-12 10:00:43,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:00:43,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 10:00:43,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:00:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-12 10:00:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 10:00:43,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:43,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:43,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:43,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:43,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:43,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:43,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:43,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:43,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:43,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:43,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:43,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-10-12 10:00:43,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296482626] [2020-10-12 10:00:43,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:43,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:00:43,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335446670] [2020-10-12 10:00:43,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:00:43,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:43,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:00:43,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:00:43,537 INFO L87 Difference]: Start difference. First operand 142 states and 148 transitions. Second operand 23 states. [2020-10-12 10:00:43,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:43,895 INFO L93 Difference]: Finished difference Result 264 states and 281 transitions. [2020-10-12 10:00:43,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:00:43,896 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 137 [2020-10-12 10:00:43,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:43,897 INFO L225 Difference]: With dead ends: 264 [2020-10-12 10:00:43,897 INFO L226 Difference]: Without dead ends: 148 [2020-10-12 10:00:43,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:00:43,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-12 10:00:43,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-10-12 10:00:43,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-12 10:00:43,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 154 transitions. [2020-10-12 10:00:43,906 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 154 transitions. Word has length 137 [2020-10-12 10:00:43,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:43,906 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 154 transitions. [2020-10-12 10:00:43,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:00:43,907 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 154 transitions. [2020-10-12 10:00:43,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-12 10:00:43,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:43,908 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:43,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:00:43,908 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:43,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:43,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1786425622, now seen corresponding path program 20 times [2020-10-12 10:00:43,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:43,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621607494] [2020-10-12 10:00:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:43,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:44,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:44,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:44,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:48,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:48,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-12 10:00:48,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:00:48,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-12 10:00:48,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:48,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:00:48,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-12 10:00:48,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:00:48,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:49,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:49,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:49,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:49,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:49,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:49,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:49,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:49,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:49,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:49,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:49,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2020-10-12 10:00:49,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621607494] [2020-10-12 10:00:49,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:49,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 10:00:49,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399529793] [2020-10-12 10:00:49,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 10:00:49,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:49,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 10:00:49,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:00:49,257 INFO L87 Difference]: Start difference. First operand 148 states and 154 transitions. Second operand 24 states. [2020-10-12 10:00:49,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:49,670 INFO L93 Difference]: Finished difference Result 275 states and 292 transitions. [2020-10-12 10:00:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:00:49,670 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 143 [2020-10-12 10:00:49,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:49,672 INFO L225 Difference]: With dead ends: 275 [2020-10-12 10:00:49,672 INFO L226 Difference]: Without dead ends: 154 [2020-10-12 10:00:49,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:00:49,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-12 10:00:49,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-10-12 10:00:49,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-12 10:00:49,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 160 transitions. [2020-10-12 10:00:49,688 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 160 transitions. Word has length 143 [2020-10-12 10:00:49,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:49,691 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 160 transitions. [2020-10-12 10:00:49,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 10:00:49,691 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 160 transitions. [2020-10-12 10:00:49,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-12 10:00:49,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:49,694 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:49,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:00:49,694 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:49,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:49,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1930731085, now seen corresponding path program 21 times [2020-10-12 10:00:49,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:49,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561157276] [2020-10-12 10:00:49,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:49,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:49,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:49,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:49,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:54,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:54,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-12 10:00:54,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:00:54,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-12 10:00:54,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:54,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:00:54,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-12 10:00:54,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 10:00:54,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:55,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:55,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:55,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:55,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:55,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:55,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:55,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:55,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:55,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:55,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:55,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2020-10-12 10:00:55,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561157276] [2020-10-12 10:00:55,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:55,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:00:55,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035648993] [2020-10-12 10:00:55,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:00:55,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:55,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:00:55,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:00:55,086 INFO L87 Difference]: Start difference. First operand 154 states and 160 transitions. Second operand 25 states. [2020-10-12 10:00:55,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:55,423 INFO L93 Difference]: Finished difference Result 286 states and 303 transitions. [2020-10-12 10:00:55,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:00:55,427 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 149 [2020-10-12 10:00:55,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:55,428 INFO L225 Difference]: With dead ends: 286 [2020-10-12 10:00:55,428 INFO L226 Difference]: Without dead ends: 160 [2020-10-12 10:00:55,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:00:55,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-12 10:00:55,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-12 10:00:55,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-12 10:00:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 166 transitions. [2020-10-12 10:00:55,436 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 166 transitions. Word has length 149 [2020-10-12 10:00:55,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:55,436 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 166 transitions. [2020-10-12 10:00:55,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:00:55,436 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 166 transitions. [2020-10-12 10:00:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-12 10:00:55,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:55,438 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:55,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 10:00:55,438 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:55,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:55,439 INFO L82 PathProgramCache]: Analyzing trace with hash -558149962, now seen corresponding path program 22 times [2020-10-12 10:00:55,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:55,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397540477] [2020-10-12 10:00:55,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:55,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:55,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:55,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:55,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:00,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:00,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-12 10:01:00,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:01:00,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-12 10:01:00,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:00,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 10:01:00,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-12 10:01:00,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:01:00,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:00,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:00,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:00,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:00,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:00,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:00,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:00,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:00,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:00,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:00,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:00,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2020-10-12 10:01:00,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397540477] [2020-10-12 10:01:00,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:00,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 10:01:00,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283000400] [2020-10-12 10:01:00,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 10:01:00,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:00,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 10:01:00,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:01:00,846 INFO L87 Difference]: Start difference. First operand 160 states and 166 transitions. Second operand 26 states. [2020-10-12 10:01:01,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:01,217 INFO L93 Difference]: Finished difference Result 297 states and 314 transitions. [2020-10-12 10:01:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 10:01:01,222 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 155 [2020-10-12 10:01:01,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:01,223 INFO L225 Difference]: With dead ends: 297 [2020-10-12 10:01:01,223 INFO L226 Difference]: Without dead ends: 166 [2020-10-12 10:01:01,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:01:01,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-12 10:01:01,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2020-10-12 10:01:01,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-12 10:01:01,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 172 transitions. [2020-10-12 10:01:01,230 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 172 transitions. Word has length 155 [2020-10-12 10:01:01,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:01,231 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 172 transitions. [2020-10-12 10:01:01,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 10:01:01,231 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 172 transitions. [2020-10-12 10:01:01,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-12 10:01:01,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:01,232 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:01,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 10:01:01,233 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:01,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:01,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1204989331, now seen corresponding path program 23 times [2020-10-12 10:01:01,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:01,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416339119] [2020-10-12 10:01:01,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:01,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:01,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:01,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:01,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:06,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:06,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-12 10:01:06,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:01:06,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 10:01:06,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:06,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 10:01:06,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:06,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:01:06,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:06,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:06,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:06,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:06,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:06,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:06,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:06,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:06,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:06,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:06,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:06,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1380 trivial. 0 not checked. [2020-10-12 10:01:06,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416339119] [2020-10-12 10:01:06,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:06,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 10:01:06,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947106700] [2020-10-12 10:01:06,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 10:01:06,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:06,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 10:01:06,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:01:06,672 INFO L87 Difference]: Start difference. First operand 166 states and 172 transitions. Second operand 27 states. [2020-10-12 10:01:07,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:07,089 INFO L93 Difference]: Finished difference Result 308 states and 325 transitions. [2020-10-12 10:01:07,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 10:01:07,089 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 161 [2020-10-12 10:01:07,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:07,091 INFO L225 Difference]: With dead ends: 308 [2020-10-12 10:01:07,091 INFO L226 Difference]: Without dead ends: 172 [2020-10-12 10:01:07,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:01:07,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-12 10:01:07,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-12 10:01:07,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-12 10:01:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 178 transitions. [2020-10-12 10:01:07,099 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 178 transitions. Word has length 161 [2020-10-12 10:01:07,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:07,099 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 178 transitions. [2020-10-12 10:01:07,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 10:01:07,099 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 178 transitions. [2020-10-12 10:01:07,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-12 10:01:07,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:07,101 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:07,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 10:01:07,104 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:07,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:07,105 INFO L82 PathProgramCache]: Analyzing trace with hash 835839062, now seen corresponding path program 24 times [2020-10-12 10:01:07,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:07,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844204227] [2020-10-12 10:01:07,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:07,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:07,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:07,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:07,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:12,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:12,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-12 10:01:12,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:01:12,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:01:12,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:12,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 10:01:12,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 10:01:12,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:01:12,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:12,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:12,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:12,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:12,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:12,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:12,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:12,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:12,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:12,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:12,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:12,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1500 trivial. 0 not checked. [2020-10-12 10:01:12,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844204227] [2020-10-12 10:01:12,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:12,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 10:01:12,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564562634] [2020-10-12 10:01:12,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 10:01:12,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:12,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 10:01:12,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:01:12,558 INFO L87 Difference]: Start difference. First operand 172 states and 178 transitions. Second operand 28 states. [2020-10-12 10:01:13,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:13,000 INFO L93 Difference]: Finished difference Result 319 states and 336 transitions. [2020-10-12 10:01:13,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:01:13,001 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 167 [2020-10-12 10:01:13,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:13,002 INFO L225 Difference]: With dead ends: 319 [2020-10-12 10:01:13,002 INFO L226 Difference]: Without dead ends: 178 [2020-10-12 10:01:13,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:01:13,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-12 10:01:13,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-10-12 10:01:13,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-12 10:01:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 184 transitions. [2020-10-12 10:01:13,009 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 184 transitions. Word has length 167 [2020-10-12 10:01:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:13,010 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 184 transitions. [2020-10-12 10:01:13,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 10:01:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 184 transitions. [2020-10-12 10:01:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-12 10:01:13,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:13,011 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:13,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 10:01:13,011 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:13,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:13,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1841807731, now seen corresponding path program 25 times [2020-10-12 10:01:13,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:13,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394113693] [2020-10-12 10:01:13,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:13,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:13,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:13,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:13,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:18,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:18,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-12 10:01:18,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:01:18,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 10:01:18,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:18,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 10:01:18,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:18,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:01:18,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:18,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:18,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:18,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:18,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:18,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:18,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:18,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:18,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:18,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:18,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:18,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:01:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1950 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1625 trivial. 0 not checked. [2020-10-12 10:01:18,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394113693] [2020-10-12 10:01:18,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:18,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:01:18,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266843965] [2020-10-12 10:01:18,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:01:18,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:18,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:01:18,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:01:18,547 INFO L87 Difference]: Start difference. First operand 178 states and 184 transitions. Second operand 29 states. [2020-10-12 10:01:19,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:19,081 INFO L93 Difference]: Finished difference Result 330 states and 347 transitions. [2020-10-12 10:01:19,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 10:01:19,082 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 173 [2020-10-12 10:01:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:19,083 INFO L225 Difference]: With dead ends: 330 [2020-10-12 10:01:19,084 INFO L226 Difference]: Without dead ends: 184 [2020-10-12 10:01:19,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:01:19,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-12 10:01:19,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2020-10-12 10:01:19,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-12 10:01:19,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 190 transitions. [2020-10-12 10:01:19,095 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 190 transitions. Word has length 173 [2020-10-12 10:01:19,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:19,095 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 190 transitions. [2020-10-12 10:01:19,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 10:01:19,095 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 190 transitions. [2020-10-12 10:01:19,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-12 10:01:19,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:19,098 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:19,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 10:01:19,098 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:19,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:19,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1193512458, now seen corresponding path program 26 times [2020-10-12 10:01:19,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:19,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720404817] [2020-10-12 10:01:19,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:19,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:19,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:19,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:19,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:24,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:24,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-12 10:01:24,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:01:24,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-12 10:01:24,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:24,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 10:01:24,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-12 10:01:24,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:01:24,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:24,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:24,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:24,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:24,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:24,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:24,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:24,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:24,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:24,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:24,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:24,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2106 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1755 trivial. 0 not checked. [2020-10-12 10:01:24,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720404817] [2020-10-12 10:01:24,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:24,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 10:01:24,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134112765] [2020-10-12 10:01:24,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 10:01:24,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:24,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 10:01:24,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:01:24,788 INFO L87 Difference]: Start difference. First operand 184 states and 190 transitions. Second operand 30 states. [2020-10-12 10:01:25,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:25,340 INFO L93 Difference]: Finished difference Result 341 states and 358 transitions. [2020-10-12 10:01:25,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:01:25,340 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 179 [2020-10-12 10:01:25,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:25,343 INFO L225 Difference]: With dead ends: 341 [2020-10-12 10:01:25,343 INFO L226 Difference]: Without dead ends: 190 [2020-10-12 10:01:25,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:01:25,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-12 10:01:25,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2020-10-12 10:01:25,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-12 10:01:25,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 196 transitions. [2020-10-12 10:01:25,353 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 196 transitions. Word has length 179 [2020-10-12 10:01:25,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:25,354 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 196 transitions. [2020-10-12 10:01:25,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 10:01:25,354 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 196 transitions. [2020-10-12 10:01:25,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-12 10:01:25,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:25,355 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:25,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 10:01:25,355 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:25,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:25,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1066179923, now seen corresponding path program 27 times [2020-10-12 10:01:25,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:25,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044568763] [2020-10-12 10:01:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:25,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:25,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:25,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:25,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:30,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:30,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-12 10:01:30,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:01:30,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 10:01:30,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:30,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 10:01:30,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:30,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 10:01:30,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:30,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:30,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:30,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:30,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:30,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:30,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:30,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:30,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2020-10-12 10:01:30,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044568763] [2020-10-12 10:01:30,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:30,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 10:01:30,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207222974] [2020-10-12 10:01:30,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 10:01:30,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:30,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 10:01:30,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:01:30,957 INFO L87 Difference]: Start difference. First operand 190 states and 196 transitions. Second operand 31 states. [2020-10-12 10:01:31,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:31,411 INFO L93 Difference]: Finished difference Result 352 states and 369 transitions. [2020-10-12 10:01:31,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:01:31,412 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 185 [2020-10-12 10:01:31,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:31,413 INFO L225 Difference]: With dead ends: 352 [2020-10-12 10:01:31,413 INFO L226 Difference]: Without dead ends: 196 [2020-10-12 10:01:31,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:01:31,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-12 10:01:31,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2020-10-12 10:01:31,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-12 10:01:31,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 202 transitions. [2020-10-12 10:01:31,424 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 202 transitions. Word has length 185 [2020-10-12 10:01:31,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:31,425 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 202 transitions. [2020-10-12 10:01:31,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 10:01:31,425 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 202 transitions. [2020-10-12 10:01:31,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-12 10:01:31,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:31,427 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:31,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 10:01:31,428 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:31,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:31,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1434912874, now seen corresponding path program 28 times [2020-10-12 10:01:31,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:31,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758091210] [2020-10-12 10:01:31,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:31,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:31,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:31,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:32,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:36,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:36,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-12 10:01:36,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:01:36,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 10:01:36,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:36,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 10:01:36,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:36,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:01:36,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:37,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:37,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:37,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:37,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:37,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:37,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:37,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:37,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:37,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:37,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:37,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:01:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2436 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2020-10-12 10:01:37,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758091210] [2020-10-12 10:01:37,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:37,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 10:01:37,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89973230] [2020-10-12 10:01:37,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 10:01:37,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:37,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 10:01:37,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:01:37,166 INFO L87 Difference]: Start difference. First operand 196 states and 202 transitions. Second operand 32 states. [2020-10-12 10:01:37,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:37,729 INFO L93 Difference]: Finished difference Result 363 states and 380 transitions. [2020-10-12 10:01:37,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:01:37,729 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 191 [2020-10-12 10:01:37,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:37,731 INFO L225 Difference]: With dead ends: 363 [2020-10-12 10:01:37,731 INFO L226 Difference]: Without dead ends: 202 [2020-10-12 10:01:37,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:01:37,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-12 10:01:37,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-10-12 10:01:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-12 10:01:37,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 208 transitions. [2020-10-12 10:01:37,742 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 208 transitions. Word has length 191 [2020-10-12 10:01:37,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:37,743 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 208 transitions. [2020-10-12 10:01:37,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 10:01:37,743 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 208 transitions. [2020-10-12 10:01:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-12 10:01:37,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:37,745 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:37,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 10:01:37,746 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:37,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:37,746 INFO L82 PathProgramCache]: Analyzing trace with hash 476266803, now seen corresponding path program 29 times [2020-10-12 10:01:37,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:37,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309623541] [2020-10-12 10:01:37,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:37,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:37,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:38,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:38,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:42,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:42,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-12 10:01:42,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:01:42,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-12 10:01:42,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:42,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 10:01:42,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 10:01:42,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 10:01:42,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:43,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:43,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:43,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:43,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:43,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:43,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:01:43,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:43,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:43,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:43,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:43,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2610 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 2175 trivial. 0 not checked. [2020-10-12 10:01:43,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309623541] [2020-10-12 10:01:43,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:43,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 10:01:43,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430454354] [2020-10-12 10:01:43,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 10:01:43,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:43,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 10:01:43,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:01:43,371 INFO L87 Difference]: Start difference. First operand 202 states and 208 transitions. Second operand 33 states. [2020-10-12 10:01:43,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:43,968 INFO L93 Difference]: Finished difference Result 374 states and 391 transitions. [2020-10-12 10:01:43,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:01:43,969 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 197 [2020-10-12 10:01:43,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:43,970 INFO L225 Difference]: With dead ends: 374 [2020-10-12 10:01:43,970 INFO L226 Difference]: Without dead ends: 208 [2020-10-12 10:01:43,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:01:43,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-12 10:01:43,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2020-10-12 10:01:43,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-12 10:01:43,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 214 transitions. [2020-10-12 10:01:43,992 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 214 transitions. Word has length 197 [2020-10-12 10:01:43,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:43,992 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 214 transitions. [2020-10-12 10:01:43,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 10:01:43,992 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 214 transitions. [2020-10-12 10:01:43,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-12 10:01:43,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:43,994 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:43,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 10:01:43,994 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:43,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:43,995 INFO L82 PathProgramCache]: Analyzing trace with hash -20613834, now seen corresponding path program 30 times [2020-10-12 10:01:43,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:43,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465369153] [2020-10-12 10:01:43,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:44,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:44,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:44,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:44,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:49,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:49,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-12 10:01:49,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:01:49,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 10:01:49,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:49,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 10:01:49,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:49,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 10:01:49,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:49,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:49,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:49,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:49,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:49,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:49,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:49,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:49,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:49,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:49,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:49,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2325 trivial. 0 not checked. [2020-10-12 10:01:49,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465369153] [2020-10-12 10:01:49,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:49,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 10:01:49,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877836559] [2020-10-12 10:01:49,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 10:01:49,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:49,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 10:01:49,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:01:49,677 INFO L87 Difference]: Start difference. First operand 208 states and 214 transitions. Second operand 34 states. [2020-10-12 10:01:50,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:50,211 INFO L93 Difference]: Finished difference Result 385 states and 402 transitions. [2020-10-12 10:01:50,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 10:01:50,211 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 203 [2020-10-12 10:01:50,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:50,213 INFO L225 Difference]: With dead ends: 385 [2020-10-12 10:01:50,213 INFO L226 Difference]: Without dead ends: 214 [2020-10-12 10:01:50,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:01:50,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-12 10:01:50,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-10-12 10:01:50,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-12 10:01:50,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 220 transitions. [2020-10-12 10:01:50,222 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 220 transitions. Word has length 203 [2020-10-12 10:01:50,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:50,222 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 220 transitions. [2020-10-12 10:01:50,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 10:01:50,223 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 220 transitions. [2020-10-12 10:01:50,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-12 10:01:50,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:50,224 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:50,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 10:01:50,224 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:50,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:50,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1576162029, now seen corresponding path program 31 times [2020-10-12 10:01:50,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:50,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956415916] [2020-10-12 10:01:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:50,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:50,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:50,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:50,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:55,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:55,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-12 10:01:55,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:01:55,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-12 10:01:55,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:55,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:01:55,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-12 10:01:55,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 10:01:55,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:01:55,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:55,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:55,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:55,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:55,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:55,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:55,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:55,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:55,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:55,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:55,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:55,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2976 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2020-10-12 10:01:55,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956415916] [2020-10-12 10:01:55,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:55,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 10:01:55,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082010653] [2020-10-12 10:01:55,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 10:01:55,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:55,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 10:01:55,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:01:55,970 INFO L87 Difference]: Start difference. First operand 214 states and 220 transitions. Second operand 35 states. [2020-10-12 10:01:56,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:56,498 INFO L93 Difference]: Finished difference Result 396 states and 413 transitions. [2020-10-12 10:01:56,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:01:56,499 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 209 [2020-10-12 10:01:56,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:56,501 INFO L225 Difference]: With dead ends: 396 [2020-10-12 10:01:56,501 INFO L226 Difference]: Without dead ends: 220 [2020-10-12 10:01:56,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:01:56,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-12 10:01:56,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2020-10-12 10:01:56,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-12 10:01:56,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 226 transitions. [2020-10-12 10:01:56,509 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 226 transitions. Word has length 209 [2020-10-12 10:01:56,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:56,509 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 226 transitions. [2020-10-12 10:01:56,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 10:01:56,510 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 226 transitions. [2020-10-12 10:01:56,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-12 10:01:56,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:56,511 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:56,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 10:01:56,511 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:56,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:56,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1331686102, now seen corresponding path program 32 times [2020-10-12 10:01:56,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:56,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421249036] [2020-10-12 10:01:56,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:56,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:56,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:57,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:57,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:01,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:01,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-12 10:02:01,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:02:01,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 10:02:01,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:01,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 10:02:01,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-12 10:02:01,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 10:02:01,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:02,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:02,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:02,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:02,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:02,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:02,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:02,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:02,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:02,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:02,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:02,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:02:02,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3168 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2020-10-12 10:02:02,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421249036] [2020-10-12 10:02:02,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:02,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 10:02:02,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094334916] [2020-10-12 10:02:02,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 10:02:02,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:02,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 10:02:02,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:02:02,234 INFO L87 Difference]: Start difference. First operand 220 states and 226 transitions. Second operand 36 states. [2020-10-12 10:02:02,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:02,818 INFO L93 Difference]: Finished difference Result 407 states and 424 transitions. [2020-10-12 10:02:02,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 10:02:02,818 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 215 [2020-10-12 10:02:02,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:02,820 INFO L225 Difference]: With dead ends: 407 [2020-10-12 10:02:02,820 INFO L226 Difference]: Without dead ends: 226 [2020-10-12 10:02:02,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:02:02,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-12 10:02:02,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2020-10-12 10:02:02,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-12 10:02:02,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 232 transitions. [2020-10-12 10:02:02,831 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 232 transitions. Word has length 215 [2020-10-12 10:02:02,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:02,832 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 232 transitions. [2020-10-12 10:02:02,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 10:02:02,832 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 232 transitions. [2020-10-12 10:02:02,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-12 10:02:02,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:02,833 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:02,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 10:02:02,834 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:02,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:02,834 INFO L82 PathProgramCache]: Analyzing trace with hash -858922765, now seen corresponding path program 33 times [2020-10-12 10:02:02,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:02,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60599628] [2020-10-12 10:02:02,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:02,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:03,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:03,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:03,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:07,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:07,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-12 10:02:07,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:02:07,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:02:07,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:07,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 10:02:07,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-12 10:02:07,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 10:02:07,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:08,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:08,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:08,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:08,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:08,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:08,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:08,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:08,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:08,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:08,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:08,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3366 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2020-10-12 10:02:08,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60599628] [2020-10-12 10:02:08,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:08,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 10:02:08,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914450085] [2020-10-12 10:02:08,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 10:02:08,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:08,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 10:02:08,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:02:08,589 INFO L87 Difference]: Start difference. First operand 226 states and 232 transitions. Second operand 37 states. [2020-10-12 10:02:09,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:09,137 INFO L93 Difference]: Finished difference Result 418 states and 435 transitions. [2020-10-12 10:02:09,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 10:02:09,137 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 221 [2020-10-12 10:02:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:09,139 INFO L225 Difference]: With dead ends: 418 [2020-10-12 10:02:09,139 INFO L226 Difference]: Without dead ends: 232 [2020-10-12 10:02:09,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:02:09,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-12 10:02:09,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2020-10-12 10:02:09,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-12 10:02:09,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 238 transitions. [2020-10-12 10:02:09,146 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 238 transitions. Word has length 221 [2020-10-12 10:02:09,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:09,146 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 238 transitions. [2020-10-12 10:02:09,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 10:02:09,146 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 238 transitions. [2020-10-12 10:02:09,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-12 10:02:09,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:09,147 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:09,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 10:02:09,147 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:09,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:09,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1218029450, now seen corresponding path program 34 times [2020-10-12 10:02:09,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:09,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724949047] [2020-10-12 10:02:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:09,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:09,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:09,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:10,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:14,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:14,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-12 10:02:14,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:02:14,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-12 10:02:14,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:14,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 10:02:14,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:02:14,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 10:02:14,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:14,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:14,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:14,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:14,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:14,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:14,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:14,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:14,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:14,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:14,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:14,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 2975 trivial. 0 not checked. [2020-10-12 10:02:14,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724949047] [2020-10-12 10:02:14,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:14,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 10:02:14,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505472542] [2020-10-12 10:02:14,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 10:02:14,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:14,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 10:02:14,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:02:14,961 INFO L87 Difference]: Start difference. First operand 232 states and 238 transitions. Second operand 38 states. [2020-10-12 10:02:15,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:15,600 INFO L93 Difference]: Finished difference Result 429 states and 446 transitions. [2020-10-12 10:02:15,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 10:02:15,600 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 227 [2020-10-12 10:02:15,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:15,602 INFO L225 Difference]: With dead ends: 429 [2020-10-12 10:02:15,602 INFO L226 Difference]: Without dead ends: 238 [2020-10-12 10:02:15,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:02:15,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-12 10:02:15,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2020-10-12 10:02:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-12 10:02:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 244 transitions. [2020-10-12 10:02:15,609 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 244 transitions. Word has length 227 [2020-10-12 10:02:15,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:15,610 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 244 transitions. [2020-10-12 10:02:15,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 10:02:15,610 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 244 transitions. [2020-10-12 10:02:15,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-12 10:02:15,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:15,611 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:15,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 10:02:15,612 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:15,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:15,612 INFO L82 PathProgramCache]: Analyzing trace with hash 392551635, now seen corresponding path program 35 times [2020-10-12 10:02:15,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:15,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32243657] [2020-10-12 10:02:15,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:15,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:15,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:15,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:16,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:20,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:20,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-12 10:02:20,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:02:20,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-12 10:02:20,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:20,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 10:02:20,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-12 10:02:20,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 10:02:20,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:21,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:21,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:21,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:21,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:21,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:21,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:21,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:21,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:21,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:21,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:21,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3780 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3150 trivial. 0 not checked. [2020-10-12 10:02:21,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32243657] [2020-10-12 10:02:21,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:21,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 10:02:21,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944216281] [2020-10-12 10:02:21,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 10:02:21,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:21,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 10:02:21,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:02:21,478 INFO L87 Difference]: Start difference. First operand 238 states and 244 transitions. Second operand 39 states. [2020-10-12 10:02:22,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:22,076 INFO L93 Difference]: Finished difference Result 440 states and 457 transitions. [2020-10-12 10:02:22,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 10:02:22,077 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 233 [2020-10-12 10:02:22,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:22,079 INFO L225 Difference]: With dead ends: 440 [2020-10-12 10:02:22,079 INFO L226 Difference]: Without dead ends: 244 [2020-10-12 10:02:22,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:02:22,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-12 10:02:22,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2020-10-12 10:02:22,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-12 10:02:22,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 250 transitions. [2020-10-12 10:02:22,088 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 250 transitions. Word has length 233 [2020-10-12 10:02:22,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:22,088 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 250 transitions. [2020-10-12 10:02:22,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 10:02:22,088 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 250 transitions. [2020-10-12 10:02:22,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-12 10:02:22,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:22,090 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:22,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 10:02:22,090 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:22,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:22,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1284063722, now seen corresponding path program 36 times [2020-10-12 10:02:22,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:22,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378609949] [2020-10-12 10:02:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:22,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:22,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:22,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:22,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:27,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:27,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-12 10:02:27,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:02:27,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 10:02:27,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:27,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 10:02:27,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-12 10:02:27,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 10:02:27,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:27,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:27,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:27,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:27,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:27,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:27,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:27,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:27,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:27,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:27,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:27,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:27,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:27,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3996 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3330 trivial. 0 not checked. [2020-10-12 10:02:27,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378609949] [2020-10-12 10:02:27,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:27,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 10:02:27,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362459070] [2020-10-12 10:02:27,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 10:02:27,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:27,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 10:02:27,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 10:02:27,973 INFO L87 Difference]: Start difference. First operand 244 states and 250 transitions. Second operand 40 states. [2020-10-12 10:02:28,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:28,646 INFO L93 Difference]: Finished difference Result 451 states and 468 transitions. [2020-10-12 10:02:28,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 10:02:28,647 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 239 [2020-10-12 10:02:28,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:28,648 INFO L225 Difference]: With dead ends: 451 [2020-10-12 10:02:28,648 INFO L226 Difference]: Without dead ends: 250 [2020-10-12 10:02:28,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 10:02:28,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-12 10:02:28,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2020-10-12 10:02:28,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-12 10:02:28,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 256 transitions. [2020-10-12 10:02:28,656 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 256 transitions. Word has length 239 [2020-10-12 10:02:28,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:28,657 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 256 transitions. [2020-10-12 10:02:28,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 10:02:28,657 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 256 transitions. [2020-10-12 10:02:28,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-12 10:02:28,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:28,658 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:28,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 10:02:28,659 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:28,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:28,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1692950349, now seen corresponding path program 37 times [2020-10-12 10:02:28,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:28,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702468805] [2020-10-12 10:02:28,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:28,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:28,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:29,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:29,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:33,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:33,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-12 10:02:33,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:02:33,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-12 10:02:33,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:33,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 10:02:33,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 128 [2020-10-12 10:02:33,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 10:02:33,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:34,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:34,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:34,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:34,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:34,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:34,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:34,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:34,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:34,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:34,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:34,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4218 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 3515 trivial. 0 not checked. [2020-10-12 10:02:34,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702468805] [2020-10-12 10:02:34,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:34,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 10:02:34,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918160659] [2020-10-12 10:02:34,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 10:02:34,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:34,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 10:02:34,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:02:34,606 INFO L87 Difference]: Start difference. First operand 250 states and 256 transitions. Second operand 41 states. [2020-10-12 10:02:35,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:35,276 INFO L93 Difference]: Finished difference Result 462 states and 479 transitions. [2020-10-12 10:02:35,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 10:02:35,277 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 245 [2020-10-12 10:02:35,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:35,279 INFO L225 Difference]: With dead ends: 462 [2020-10-12 10:02:35,279 INFO L226 Difference]: Without dead ends: 256 [2020-10-12 10:02:35,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:02:35,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-12 10:02:35,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2020-10-12 10:02:35,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-12 10:02:35,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 262 transitions. [2020-10-12 10:02:35,287 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 262 transitions. Word has length 245 [2020-10-12 10:02:35,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:35,288 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 262 transitions. [2020-10-12 10:02:35,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 10:02:35,288 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 262 transitions. [2020-10-12 10:02:35,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-12 10:02:35,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:35,289 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:35,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 10:02:35,290 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:35,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:35,290 INFO L82 PathProgramCache]: Analyzing trace with hash 28253110, now seen corresponding path program 38 times [2020-10-12 10:02:35,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:35,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087228835] [2020-10-12 10:02:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:35,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:35,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:35,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:35,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:40,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:40,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-12 10:02:40,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:02:40,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-12 10:02:40,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:40,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 10:02:40,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-12 10:02:40,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 10:02:40,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:41,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:41,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:41,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:41,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:41,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:41,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:41,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:41,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:41,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:41,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:41,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4446 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 3705 trivial. 0 not checked. [2020-10-12 10:02:41,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087228835] [2020-10-12 10:02:41,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:41,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 10:02:41,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528714677] [2020-10-12 10:02:41,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 10:02:41,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:41,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 10:02:41,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:02:41,275 INFO L87 Difference]: Start difference. First operand 256 states and 262 transitions. Second operand 42 states. [2020-10-12 10:02:41,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:41,863 INFO L93 Difference]: Finished difference Result 473 states and 490 transitions. [2020-10-12 10:02:41,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 10:02:41,864 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 251 [2020-10-12 10:02:41,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:41,865 INFO L225 Difference]: With dead ends: 473 [2020-10-12 10:02:41,866 INFO L226 Difference]: Without dead ends: 262 [2020-10-12 10:02:41,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:02:41,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-12 10:02:41,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2020-10-12 10:02:41,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-12 10:02:41,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 268 transitions. [2020-10-12 10:02:41,874 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 268 transitions. Word has length 251 [2020-10-12 10:02:41,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:41,875 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 268 transitions. [2020-10-12 10:02:41,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 10:02:41,875 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 268 transitions. [2020-10-12 10:02:41,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-12 10:02:41,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:41,876 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:41,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 10:02:41,877 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:41,877 INFO L82 PathProgramCache]: Analyzing trace with hash 799354003, now seen corresponding path program 39 times [2020-10-12 10:02:41,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:41,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778637555] [2020-10-12 10:02:41,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:41,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:42,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:42,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:42,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:46,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:46,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-12 10:02:46,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:02:46,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-12 10:02:46,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:46,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 10:02:46,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-12 10:02:46,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 10:02:46,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:47,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:47,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:47,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:47,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:47,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:47,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:47,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:47,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:47,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:47,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:47,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4680 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 3900 trivial. 0 not checked. [2020-10-12 10:02:47,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778637555] [2020-10-12 10:02:47,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:47,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 10:02:47,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59495559] [2020-10-12 10:02:47,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 10:02:47,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:47,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 10:02:47,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:02:47,921 INFO L87 Difference]: Start difference. First operand 262 states and 268 transitions. Second operand 43 states. [2020-10-12 10:02:48,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:48,497 INFO L93 Difference]: Finished difference Result 484 states and 501 transitions. [2020-10-12 10:02:48,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 10:02:48,498 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 257 [2020-10-12 10:02:48,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:48,500 INFO L225 Difference]: With dead ends: 484 [2020-10-12 10:02:48,500 INFO L226 Difference]: Without dead ends: 268 [2020-10-12 10:02:48,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:02:48,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-12 10:02:48,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2020-10-12 10:02:48,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-12 10:02:48,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 274 transitions. [2020-10-12 10:02:48,507 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 274 transitions. Word has length 257 [2020-10-12 10:02:48,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:48,508 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 274 transitions. [2020-10-12 10:02:48,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 10:02:48,508 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 274 transitions. [2020-10-12 10:02:48,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-12 10:02:48,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:48,509 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:48,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 10:02:48,510 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:48,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:48,510 INFO L82 PathProgramCache]: Analyzing trace with hash -2119339690, now seen corresponding path program 40 times [2020-10-12 10:02:48,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:48,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321267670] [2020-10-12 10:02:48,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:48,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:48,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:48,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:49,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:53,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:53,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-12 10:02:53,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:02:53,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-12 10:02:53,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:53,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 10:02:53,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 137 [2020-10-12 10:02:53,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 10:02:53,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:54,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:54,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:54,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:54,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:54,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:54,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:54,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:54,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:54,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:54,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:54,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:54,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4920 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 4100 trivial. 0 not checked. [2020-10-12 10:02:54,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321267670] [2020-10-12 10:02:54,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:54,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 10:02:54,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813331586] [2020-10-12 10:02:54,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 10:02:54,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:54,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 10:02:54,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 10:02:54,625 INFO L87 Difference]: Start difference. First operand 268 states and 274 transitions. Second operand 44 states. [2020-10-12 10:02:55,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:55,370 INFO L93 Difference]: Finished difference Result 495 states and 512 transitions. [2020-10-12 10:02:55,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 10:02:55,371 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 263 [2020-10-12 10:02:55,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:55,372 INFO L225 Difference]: With dead ends: 495 [2020-10-12 10:02:55,372 INFO L226 Difference]: Without dead ends: 274 [2020-10-12 10:02:55,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 10:02:55,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-12 10:02:55,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2020-10-12 10:02:55,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-12 10:02:55,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 280 transitions. [2020-10-12 10:02:55,380 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 280 transitions. Word has length 263 [2020-10-12 10:02:55,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:55,380 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 280 transitions. [2020-10-12 10:02:55,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 10:02:55,381 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 280 transitions. [2020-10-12 10:02:55,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-12 10:02:55,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:55,382 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:55,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 10:02:55,382 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:55,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:55,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1957658509, now seen corresponding path program 41 times [2020-10-12 10:02:55,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:55,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318932075] [2020-10-12 10:02:55,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:55,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:55,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:55,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:56,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:00,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:03:00,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 277 [2020-10-12 10:03:00,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:03:00,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-12 10:03:00,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:03:00,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 10:03:00,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:03:00,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 10:03:00,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:03:01,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:03:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:03:01,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:01,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:03:01,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:03:01,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:03:01,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:03:01,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:03:01,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:03:01,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:03:01,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:03:01,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:03:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5166 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 4305 trivial. 0 not checked. [2020-10-12 10:03:01,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318932075] [2020-10-12 10:03:01,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:03:01,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 10:03:01,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130671406] [2020-10-12 10:03:01,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 10:03:01,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:03:01,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 10:03:01,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 10:03:01,492 INFO L87 Difference]: Start difference. First operand 274 states and 280 transitions. Second operand 45 states. [2020-10-12 10:03:02,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:03:02,272 INFO L93 Difference]: Finished difference Result 506 states and 523 transitions. [2020-10-12 10:03:02,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 10:03:02,273 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 269 [2020-10-12 10:03:02,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:03:02,275 INFO L225 Difference]: With dead ends: 506 [2020-10-12 10:03:02,275 INFO L226 Difference]: Without dead ends: 280 [2020-10-12 10:03:02,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 10:03:02,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-12 10:03:02,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2020-10-12 10:03:02,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-12 10:03:02,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 286 transitions. [2020-10-12 10:03:02,283 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 286 transitions. Word has length 269 [2020-10-12 10:03:02,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:03:02,284 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 286 transitions. [2020-10-12 10:03:02,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 10:03:02,284 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 286 transitions. [2020-10-12 10:03:02,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-10-12 10:03:02,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:03:02,286 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:03:02,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 10:03:02,286 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:03:02,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:03:02,287 INFO L82 PathProgramCache]: Analyzing trace with hash 344964854, now seen corresponding path program 42 times [2020-10-12 10:03:02,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:03:02,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792948272] [2020-10-12 10:03:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:03:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:03:02,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:02,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:02,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:03,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking...