/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:35:12,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:35:12,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:35:12,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:35:12,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:35:12,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:35:12,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:35:12,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:35:12,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:35:12,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:35:12,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:35:12,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:35:12,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:35:12,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:35:12,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:35:12,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:35:12,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:35:12,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:35:12,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:35:12,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:35:12,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:35:12,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:35:12,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:35:12,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:35:12,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:35:12,338 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:35:12,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:35:12,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:35:12,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:35:12,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:35:12,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:35:12,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:35:12,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:35:12,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:35:12,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:35:12,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:35:12,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:35:12,346 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:35:12,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:35:12,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:35:12,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:35:12,349 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 19:35:12,375 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:35:12,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:35:12,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:35:12,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:35:12,377 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:35:12,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:35:12,377 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:35:12,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:35:12,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:35:12,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:35:12,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:35:12,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:35:12,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:35:12,381 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:35:12,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:35:12,382 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:35:12,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:35:12,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:35:12,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:35:12,383 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:35:12,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:35:12,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:35:12,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:35:12,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:35:12,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:35:12,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:35:12,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:35:12,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:35:12,384 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:35:12,385 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:35:12,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:35:12,849 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:35:12,853 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:35:12,854 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:35:12,855 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:35:12,856 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-09-24 19:35:12,942 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b15661335/f9cc4035bbe14242a31d906e1637dc15/FLAG0542b19ea [2020-09-24 19:35:13,526 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:35:13,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-09-24 19:35:13,543 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b15661335/f9cc4035bbe14242a31d906e1637dc15/FLAG0542b19ea [2020-09-24 19:35:13,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b15661335/f9cc4035bbe14242a31d906e1637dc15 [2020-09-24 19:35:13,861 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:35:13,870 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:35:13,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:35:13,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:35:13,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:35:13,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:35:13" (1/1) ... [2020-09-24 19:35:13,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12b7bdc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:13, skipping insertion in model container [2020-09-24 19:35:13,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:35:13" (1/1) ... [2020-09-24 19:35:13,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:35:13,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:35:14,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:35:14,364 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:35:14,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:35:14,470 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:35:14,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:14 WrapperNode [2020-09-24 19:35:14,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:35:14,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:35:14,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:35:14,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:35:14,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:14" (1/1) ... [2020-09-24 19:35:14,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:14" (1/1) ... [2020-09-24 19:35:14,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:14" (1/1) ... [2020-09-24 19:35:14,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:14" (1/1) ... [2020-09-24 19:35:14,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:14" (1/1) ... [2020-09-24 19:35:14,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:14" (1/1) ... [2020-09-24 19:35:14,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:14" (1/1) ... [2020-09-24 19:35:14,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:35:14,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:35:14,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:35:14,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:35:14,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:35:14,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:35:14,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:35:14,643 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:35:14,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:35:14,644 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-09-24 19:35:14,644 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-09-24 19:35:14,645 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:35:14,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 19:35:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 19:35:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 19:35:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 19:35:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-24 19:35:14,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 19:35:14,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:35:14,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:35:14,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 19:35:14,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 19:35:15,511 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:35:15,511 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 19:35:15,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:35:15 BoogieIcfgContainer [2020-09-24 19:35:15,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:35:15,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:35:15,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:35:15,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:35:15,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:35:13" (1/3) ... [2020-09-24 19:35:15,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ead700 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:35:15, skipping insertion in model container [2020-09-24 19:35:15,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:35:14" (2/3) ... [2020-09-24 19:35:15,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ead700 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:35:15, skipping insertion in model container [2020-09-24 19:35:15,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:35:15" (3/3) ... [2020-09-24 19:35:15,530 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lh-reducer.c [2020-09-24 19:35:15,542 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:35:15,553 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:35:15,576 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:35:15,611 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:35:15,611 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:35:15,611 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:35:15,612 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:35:15,612 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:35:15,612 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:35:15,612 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:35:15,612 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:35:15,643 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states. [2020-09-24 19:35:15,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-09-24 19:35:15,666 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:15,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:15,668 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:15,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:15,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1683722235, now seen corresponding path program 1 times [2020-09-24 19:35:15,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:15,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63436223] [2020-09-24 19:35:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:16,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:17,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:17,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 324 [2020-09-24 19:35:17,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:17,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-09-24 19:35:17,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:17,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:35:17,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:17,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 19:35:17,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 19:35:17,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:17,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:17,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:17,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:17,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:17,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 19:35:17,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:17,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:17,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:17,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:17,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:17,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63436223] [2020-09-24 19:35:17,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:35:17,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:35:17,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279432749] [2020-09-24 19:35:17,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:35:17,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:17,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:35:17,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:35:17,536 INFO L87 Difference]: Start difference. First operand 363 states. Second operand 5 states. [2020-09-24 19:35:18,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:18,334 INFO L93 Difference]: Finished difference Result 416 states and 424 transitions. [2020-09-24 19:35:18,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:35:18,337 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2020-09-24 19:35:18,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:18,357 INFO L225 Difference]: With dead ends: 416 [2020-09-24 19:35:18,357 INFO L226 Difference]: Without dead ends: 349 [2020-09-24 19:35:18,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:35:18,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-09-24 19:35:18,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 335. [2020-09-24 19:35:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-09-24 19:35:18,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 335 transitions. [2020-09-24 19:35:18,433 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 335 transitions. Word has length 317 [2020-09-24 19:35:18,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:18,435 INFO L479 AbstractCegarLoop]: Abstraction has 335 states and 335 transitions. [2020-09-24 19:35:18,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:35:18,435 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 335 transitions. [2020-09-24 19:35:18,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-09-24 19:35:18,443 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:18,443 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:18,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:35:18,444 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:18,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:18,444 INFO L82 PathProgramCache]: Analyzing trace with hash 346805738, now seen corresponding path program 1 times [2020-09-24 19:35:18,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:18,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609758097] [2020-09-24 19:35:18,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:18,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:19,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:19,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:19,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-09-24 19:35:19,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:35:19,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-09-24 19:35:19,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:19,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:35:19,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:19,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 19:35:19,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 19:35:19,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:19,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:19,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:19,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:19,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:19,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-24 19:35:19,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:19,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:19,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:19,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:19,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:20,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609758097] [2020-09-24 19:35:20,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:20,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 19:35:20,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141064802] [2020-09-24 19:35:20,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 19:35:20,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:20,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 19:35:20,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:35:20,092 INFO L87 Difference]: Start difference. First operand 335 states and 335 transitions. Second operand 6 states. [2020-09-24 19:35:20,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:20,837 INFO L93 Difference]: Finished difference Result 374 states and 374 transitions. [2020-09-24 19:35:20,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 19:35:20,838 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 334 [2020-09-24 19:35:20,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:20,844 INFO L225 Difference]: With dead ends: 374 [2020-09-24 19:35:20,844 INFO L226 Difference]: Without dead ends: 366 [2020-09-24 19:35:20,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:35:20,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-09-24 19:35:20,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 352. [2020-09-24 19:35:20,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-09-24 19:35:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 352 transitions. [2020-09-24 19:35:20,883 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 352 transitions. Word has length 334 [2020-09-24 19:35:20,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:20,884 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 352 transitions. [2020-09-24 19:35:20,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 19:35:20,884 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 352 transitions. [2020-09-24 19:35:20,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-09-24 19:35:20,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:20,890 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:20,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:35:20,890 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:20,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:20,891 INFO L82 PathProgramCache]: Analyzing trace with hash -461354021, now seen corresponding path program 2 times [2020-09-24 19:35:20,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:20,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951087223] [2020-09-24 19:35:20,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:21,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:21,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:21,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:21,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 358 [2020-09-24 19:35:21,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:35:21,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-09-24 19:35:21,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:21,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:35:21,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:21,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 19:35:21,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:22,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:22,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:22,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:22,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:22,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:22,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 19:35:22,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:22,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:22,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:22,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:22,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:22,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951087223] [2020-09-24 19:35:22,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:22,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 19:35:22,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18124566] [2020-09-24 19:35:22,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:35:22,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:22,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:35:22,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:35:22,359 INFO L87 Difference]: Start difference. First operand 352 states and 352 transitions. Second operand 7 states. [2020-09-24 19:35:23,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:23,175 INFO L93 Difference]: Finished difference Result 391 states and 391 transitions. [2020-09-24 19:35:23,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 19:35:23,176 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 351 [2020-09-24 19:35:23,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:23,178 INFO L225 Difference]: With dead ends: 391 [2020-09-24 19:35:23,179 INFO L226 Difference]: Without dead ends: 383 [2020-09-24 19:35:23,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-24 19:35:23,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-09-24 19:35:23,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 369. [2020-09-24 19:35:23,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-09-24 19:35:23,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 369 transitions. [2020-09-24 19:35:23,204 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 369 transitions. Word has length 351 [2020-09-24 19:35:23,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:23,205 INFO L479 AbstractCegarLoop]: Abstraction has 369 states and 369 transitions. [2020-09-24 19:35:23,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:35:23,205 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 369 transitions. [2020-09-24 19:35:23,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-09-24 19:35:23,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:23,213 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:23,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:35:23,213 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:23,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:23,214 INFO L82 PathProgramCache]: Analyzing trace with hash -254126582, now seen corresponding path program 3 times [2020-09-24 19:35:23,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:23,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477227494] [2020-09-24 19:35:23,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:23,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:24,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:24,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:24,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 375 [2020-09-24 19:35:24,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:35:24,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-09-24 19:35:24,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:24,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:35:24,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:24,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-24 19:35:24,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:24,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:24,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:24,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:24,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:24,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:24,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 19:35:24,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:24,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:24,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:24,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:24,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 19:35:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:24,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477227494] [2020-09-24 19:35:24,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:24,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 19:35:24,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560822864] [2020-09-24 19:35:24,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 19:35:24,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:24,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 19:35:24,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 19:35:24,758 INFO L87 Difference]: Start difference. First operand 369 states and 369 transitions. Second operand 8 states. [2020-09-24 19:35:26,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:26,002 INFO L93 Difference]: Finished difference Result 408 states and 408 transitions. [2020-09-24 19:35:26,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 19:35:26,003 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 368 [2020-09-24 19:35:26,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:26,006 INFO L225 Difference]: With dead ends: 408 [2020-09-24 19:35:26,006 INFO L226 Difference]: Without dead ends: 400 [2020-09-24 19:35:26,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-24 19:35:26,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-09-24 19:35:26,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 386. [2020-09-24 19:35:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-09-24 19:35:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 386 transitions. [2020-09-24 19:35:26,019 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 386 transitions. Word has length 368 [2020-09-24 19:35:26,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:26,019 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 386 transitions. [2020-09-24 19:35:26,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 19:35:26,020 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 386 transitions. [2020-09-24 19:35:26,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2020-09-24 19:35:26,026 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:26,026 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:26,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:35:26,026 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:26,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:26,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1386344517, now seen corresponding path program 4 times [2020-09-24 19:35:26,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:26,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824639856] [2020-09-24 19:35:26,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:26,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:27,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:27,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:27,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 392 [2020-09-24 19:35:27,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:35:27,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1054 [2020-09-24 19:35:27,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:27,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 19:35:27,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:27,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-24 19:35:27,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:27,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:27,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:27,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:27,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:27,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:27,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 19:35:27,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:27,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:27,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:27,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:27,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:27,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824639856] [2020-09-24 19:35:27,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:27,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 19:35:27,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139267639] [2020-09-24 19:35:27,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 19:35:27,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:27,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 19:35:27,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:35:27,725 INFO L87 Difference]: Start difference. First operand 386 states and 386 transitions. Second operand 9 states. [2020-09-24 19:35:29,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:29,108 INFO L93 Difference]: Finished difference Result 425 states and 425 transitions. [2020-09-24 19:35:29,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 19:35:29,109 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 385 [2020-09-24 19:35:29,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:29,111 INFO L225 Difference]: With dead ends: 425 [2020-09-24 19:35:29,112 INFO L226 Difference]: Without dead ends: 417 [2020-09-24 19:35:29,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-09-24 19:35:29,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-09-24 19:35:29,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 403. [2020-09-24 19:35:29,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-09-24 19:35:29,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 403 transitions. [2020-09-24 19:35:29,129 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 403 transitions. Word has length 385 [2020-09-24 19:35:29,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:29,130 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 403 transitions. [2020-09-24 19:35:29,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 19:35:29,130 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 403 transitions. [2020-09-24 19:35:29,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-09-24 19:35:29,136 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:29,136 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:29,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 19:35:29,137 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:29,137 INFO L82 PathProgramCache]: Analyzing trace with hash 2088816170, now seen corresponding path program 5 times [2020-09-24 19:35:29,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:29,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284192270] [2020-09-24 19:35:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:29,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:30,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:30,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:30,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 409 [2020-09-24 19:35:30,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:35:30,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1205 [2020-09-24 19:35:30,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:30,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 19:35:30,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:30,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-09-24 19:35:30,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:30,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:30,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:30,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:30,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:30,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:30,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 19:35:30,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:30,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:30,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:30,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:30,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:30,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284192270] [2020-09-24 19:35:30,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:30,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 19:35:30,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514624979] [2020-09-24 19:35:30,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 19:35:30,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:30,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 19:35:30,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 19:35:30,909 INFO L87 Difference]: Start difference. First operand 403 states and 403 transitions. Second operand 10 states. [2020-09-24 19:35:32,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:32,106 INFO L93 Difference]: Finished difference Result 442 states and 442 transitions. [2020-09-24 19:35:32,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 19:35:32,107 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 402 [2020-09-24 19:35:32,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:32,110 INFO L225 Difference]: With dead ends: 442 [2020-09-24 19:35:32,110 INFO L226 Difference]: Without dead ends: 434 [2020-09-24 19:35:32,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-09-24 19:35:32,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-09-24 19:35:32,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 420. [2020-09-24 19:35:32,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-09-24 19:35:32,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 420 transitions. [2020-09-24 19:35:32,129 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 420 transitions. Word has length 402 [2020-09-24 19:35:32,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:32,131 INFO L479 AbstractCegarLoop]: Abstraction has 420 states and 420 transitions. [2020-09-24 19:35:32,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 19:35:32,131 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 420 transitions. [2020-09-24 19:35:32,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-09-24 19:35:32,140 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:32,140 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:32,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 19:35:32,141 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:32,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:32,141 INFO L82 PathProgramCache]: Analyzing trace with hash 380820379, now seen corresponding path program 6 times [2020-09-24 19:35:32,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:32,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533492462] [2020-09-24 19:35:32,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:32,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:33,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:33,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 426 [2020-09-24 19:35:33,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:33,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1025 [2020-09-24 19:35:33,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:33,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 19:35:33,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:33,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-09-24 19:35:33,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:33,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:33,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:33,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:33,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:33,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:33,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 19:35:33,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:33,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:33,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:33,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:33,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:33,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533492462] [2020-09-24 19:35:33,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:33,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 19:35:33,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554213077] [2020-09-24 19:35:33,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 19:35:33,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:33,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 19:35:33,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-24 19:35:33,738 INFO L87 Difference]: Start difference. First operand 420 states and 420 transitions. Second operand 11 states. [2020-09-24 19:35:34,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:34,979 INFO L93 Difference]: Finished difference Result 459 states and 459 transitions. [2020-09-24 19:35:34,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 19:35:34,980 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 419 [2020-09-24 19:35:34,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:34,983 INFO L225 Difference]: With dead ends: 459 [2020-09-24 19:35:34,983 INFO L226 Difference]: Without dead ends: 451 [2020-09-24 19:35:34,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-09-24 19:35:34,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-09-24 19:35:34,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 437. [2020-09-24 19:35:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-09-24 19:35:34,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 437 transitions. [2020-09-24 19:35:34,996 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 437 transitions. Word has length 419 [2020-09-24 19:35:34,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:34,997 INFO L479 AbstractCegarLoop]: Abstraction has 437 states and 437 transitions. [2020-09-24 19:35:34,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 19:35:34,998 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 437 transitions. [2020-09-24 19:35:35,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-09-24 19:35:35,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:35,006 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:35:35,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 19:35:35,006 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:35,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:35,007 INFO L82 PathProgramCache]: Analyzing trace with hash 329334346, now seen corresponding path program 7 times [2020-09-24 19:35:35,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:35,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795452434] [2020-09-24 19:35:35,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:35,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:36,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:36,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 443 [2020-09-24 19:35:36,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:36,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-09-24 19:35:36,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:36,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 19:35:36,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:36,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-24 19:35:36,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:36,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:36,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:36,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:36,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:36,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:36,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 19:35:36,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:36,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:36,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:36,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:36,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:36,682 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:36,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795452434] [2020-09-24 19:35:36,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:36,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 19:35:36,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288459098] [2020-09-24 19:35:36,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 19:35:36,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:36,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 19:35:36,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-24 19:35:36,685 INFO L87 Difference]: Start difference. First operand 437 states and 437 transitions. Second operand 12 states. [2020-09-24 19:35:38,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:38,017 INFO L93 Difference]: Finished difference Result 476 states and 476 transitions. [2020-09-24 19:35:38,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 19:35:38,018 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 436 [2020-09-24 19:35:38,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:38,022 INFO L225 Difference]: With dead ends: 476 [2020-09-24 19:35:38,023 INFO L226 Difference]: Without dead ends: 468 [2020-09-24 19:35:38,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-09-24 19:35:38,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-09-24 19:35:38,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2020-09-24 19:35:38,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-09-24 19:35:38,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 454 transitions. [2020-09-24 19:35:38,033 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 454 transitions. Word has length 436 [2020-09-24 19:35:38,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:38,034 INFO L479 AbstractCegarLoop]: Abstraction has 454 states and 454 transitions. [2020-09-24 19:35:38,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 19:35:38,034 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 454 transitions. [2020-09-24 19:35:38,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2020-09-24 19:35:38,037 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:38,038 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-09-24 19:35:38,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 19:35:38,038 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:38,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:38,039 INFO L82 PathProgramCache]: Analyzing trace with hash 146583419, now seen corresponding path program 8 times [2020-09-24 19:35:38,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:38,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862187577] [2020-09-24 19:35:38,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:38,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:39,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:39,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 460 [2020-09-24 19:35:39,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:39,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1028 [2020-09-24 19:35:39,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:39,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 19:35:39,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:39,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-09-24 19:35:39,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:39,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:39,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:39,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:39,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:39,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:39,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 19:35:39,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:39,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:39,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:39,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:39,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:39,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862187577] [2020-09-24 19:35:39,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:39,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 19:35:39,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678436133] [2020-09-24 19:35:39,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 19:35:39,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:39,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 19:35:39,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-09-24 19:35:39,801 INFO L87 Difference]: Start difference. First operand 454 states and 454 transitions. Second operand 13 states. [2020-09-24 19:35:41,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:41,421 INFO L93 Difference]: Finished difference Result 493 states and 493 transitions. [2020-09-24 19:35:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 19:35:41,422 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 453 [2020-09-24 19:35:41,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:41,428 INFO L225 Difference]: With dead ends: 493 [2020-09-24 19:35:41,428 INFO L226 Difference]: Without dead ends: 485 [2020-09-24 19:35:41,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-09-24 19:35:41,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-09-24 19:35:41,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 471. [2020-09-24 19:35:41,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-09-24 19:35:41,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 471 transitions. [2020-09-24 19:35:41,441 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 471 transitions. Word has length 453 [2020-09-24 19:35:41,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:41,442 INFO L479 AbstractCegarLoop]: Abstraction has 471 states and 471 transitions. [2020-09-24 19:35:41,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 19:35:41,442 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 471 transitions. [2020-09-24 19:35:41,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-09-24 19:35:41,445 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:41,445 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-09-24 19:35:41,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 19:35:41,446 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:41,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:41,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1849842070, now seen corresponding path program 9 times [2020-09-24 19:35:41,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:41,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44605546] [2020-09-24 19:35:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:41,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:42,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:42,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 477 [2020-09-24 19:35:42,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:42,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-09-24 19:35:42,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:42,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 19:35:42,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:42,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-09-24 19:35:42,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:42,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:43,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:43,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:43,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:43,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:43,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 19:35:43,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:43,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:43,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:43,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:43,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 0 proven. 657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:43,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44605546] [2020-09-24 19:35:43,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:43,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 19:35:43,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024571036] [2020-09-24 19:35:43,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 19:35:43,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:43,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 19:35:43,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-24 19:35:43,190 INFO L87 Difference]: Start difference. First operand 471 states and 471 transitions. Second operand 14 states. [2020-09-24 19:35:45,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:45,106 INFO L93 Difference]: Finished difference Result 510 states and 510 transitions. [2020-09-24 19:35:45,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 19:35:45,107 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 470 [2020-09-24 19:35:45,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:45,111 INFO L225 Difference]: With dead ends: 510 [2020-09-24 19:35:45,111 INFO L226 Difference]: Without dead ends: 502 [2020-09-24 19:35:45,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-09-24 19:35:45,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-09-24 19:35:45,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 488. [2020-09-24 19:35:45,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2020-09-24 19:35:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 488 transitions. [2020-09-24 19:35:45,124 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 488 transitions. Word has length 470 [2020-09-24 19:35:45,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:45,125 INFO L479 AbstractCegarLoop]: Abstraction has 488 states and 488 transitions. [2020-09-24 19:35:45,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 19:35:45,125 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 488 transitions. [2020-09-24 19:35:45,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-09-24 19:35:45,128 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:45,129 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-09-24 19:35:45,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 19:35:45,129 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:45,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:45,130 INFO L82 PathProgramCache]: Analyzing trace with hash -600208549, now seen corresponding path program 10 times [2020-09-24 19:35:45,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:45,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029538119] [2020-09-24 19:35:45,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:45,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:46,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:46,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 494 [2020-09-24 19:35:46,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:46,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1045 [2020-09-24 19:35:46,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:46,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 19:35:46,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:46,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 176 [2020-09-24 19:35:46,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:46,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:46,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:46,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:46,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:46,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:46,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 19:35:46,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:46,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:46,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:46,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:46,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 0 proven. 815 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:46,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029538119] [2020-09-24 19:35:46,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:46,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 19:35:46,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959856163] [2020-09-24 19:35:46,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 19:35:46,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:46,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 19:35:46,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-24 19:35:46,866 INFO L87 Difference]: Start difference. First operand 488 states and 488 transitions. Second operand 15 states. [2020-09-24 19:35:49,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:49,003 INFO L93 Difference]: Finished difference Result 527 states and 527 transitions. [2020-09-24 19:35:49,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 19:35:49,003 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 487 [2020-09-24 19:35:49,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:49,008 INFO L225 Difference]: With dead ends: 527 [2020-09-24 19:35:49,008 INFO L226 Difference]: Without dead ends: 519 [2020-09-24 19:35:49,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-09-24 19:35:49,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2020-09-24 19:35:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 505. [2020-09-24 19:35:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2020-09-24 19:35:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 505 transitions. [2020-09-24 19:35:49,024 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 505 transitions. Word has length 487 [2020-09-24 19:35:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:49,025 INFO L479 AbstractCegarLoop]: Abstraction has 505 states and 505 transitions. [2020-09-24 19:35:49,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 19:35:49,025 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 505 transitions. [2020-09-24 19:35:49,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-09-24 19:35:49,028 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:49,029 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-09-24 19:35:49,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 19:35:49,029 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:49,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:49,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1909982858, now seen corresponding path program 11 times [2020-09-24 19:35:49,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:49,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037002074] [2020-09-24 19:35:49,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:49,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:49,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:50,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:50,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 511 [2020-09-24 19:35:50,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:50,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1017 [2020-09-24 19:35:50,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:50,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 19:35:50,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:50,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 193 [2020-09-24 19:35:50,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:50,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:50,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:50,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:50,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:50,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:50,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 19:35:50,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:50,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:50,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:50,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:50,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:50,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037002074] [2020-09-24 19:35:50,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:50,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 19:35:50,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123050308] [2020-09-24 19:35:50,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 19:35:50,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:50,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 19:35:50,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-09-24 19:35:50,788 INFO L87 Difference]: Start difference. First operand 505 states and 505 transitions. Second operand 16 states. [2020-09-24 19:35:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:53,147 INFO L93 Difference]: Finished difference Result 544 states and 544 transitions. [2020-09-24 19:35:53,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 19:35:53,150 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 504 [2020-09-24 19:35:53,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:53,153 INFO L225 Difference]: With dead ends: 544 [2020-09-24 19:35:53,153 INFO L226 Difference]: Without dead ends: 536 [2020-09-24 19:35:53,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-09-24 19:35:53,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-09-24 19:35:53,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 522. [2020-09-24 19:35:53,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-09-24 19:35:53,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 522 transitions. [2020-09-24 19:35:53,167 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 522 transitions. Word has length 504 [2020-09-24 19:35:53,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:53,168 INFO L479 AbstractCegarLoop]: Abstraction has 522 states and 522 transitions. [2020-09-24 19:35:53,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 19:35:53,169 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 522 transitions. [2020-09-24 19:35:53,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2020-09-24 19:35:53,172 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:53,172 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-09-24 19:35:53,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 19:35:53,173 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:53,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:53,173 INFO L82 PathProgramCache]: Analyzing trace with hash 979857211, now seen corresponding path program 12 times [2020-09-24 19:35:53,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:53,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323243968] [2020-09-24 19:35:53,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:53,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:54,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:54,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 528 [2020-09-24 19:35:54,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:54,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1085 [2020-09-24 19:35:54,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:54,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 19:35:54,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:54,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 210 [2020-09-24 19:35:54,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:54,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:54,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:54,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:54,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:54,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:54,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 19:35:54,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:54,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:54,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:54,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:54,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 0 proven. 1182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:55,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323243968] [2020-09-24 19:35:55,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:55,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 19:35:55,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836528486] [2020-09-24 19:35:55,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 19:35:55,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:55,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 19:35:55,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-09-24 19:35:55,278 INFO L87 Difference]: Start difference. First operand 522 states and 522 transitions. Second operand 17 states. [2020-09-24 19:35:57,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:35:57,791 INFO L93 Difference]: Finished difference Result 561 states and 561 transitions. [2020-09-24 19:35:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 19:35:57,792 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 521 [2020-09-24 19:35:57,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:35:57,796 INFO L225 Difference]: With dead ends: 561 [2020-09-24 19:35:57,796 INFO L226 Difference]: Without dead ends: 553 [2020-09-24 19:35:57,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-09-24 19:35:57,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2020-09-24 19:35:57,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 539. [2020-09-24 19:35:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2020-09-24 19:35:57,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 539 transitions. [2020-09-24 19:35:57,810 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 539 transitions. Word has length 521 [2020-09-24 19:35:57,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:35:57,811 INFO L479 AbstractCegarLoop]: Abstraction has 539 states and 539 transitions. [2020-09-24 19:35:57,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 19:35:57,812 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 539 transitions. [2020-09-24 19:35:57,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2020-09-24 19:35:57,815 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:35:57,816 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2020-09-24 19:35:57,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 19:35:57,816 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:35:57,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:35:57,817 INFO L82 PathProgramCache]: Analyzing trace with hash -294494550, now seen corresponding path program 13 times [2020-09-24 19:35:57,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:35:57,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129199428] [2020-09-24 19:35:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:35:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:57,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:58,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:58,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 545 [2020-09-24 19:35:58,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:58,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1070 [2020-09-24 19:35:58,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:58,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 19:35:58,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 311 [2020-09-24 19:35:58,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 227 [2020-09-24 19:35:58,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:35:59,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:35:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:35:59,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:35:59,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:35:59,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:35:59,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:35:59,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 19:35:59,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:35:59,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:35:59,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:35:59,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:35:59,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:35:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 0 proven. 1391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:35:59,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129199428] [2020-09-24 19:35:59,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:35:59,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 19:35:59,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651128431] [2020-09-24 19:35:59,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 19:35:59,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:35:59,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 19:35:59,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-09-24 19:35:59,738 INFO L87 Difference]: Start difference. First operand 539 states and 539 transitions. Second operand 18 states.