/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:13:48,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:13:48,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:13:48,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:13:48,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:13:48,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:13:48,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:13:48,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:13:48,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:13:48,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:13:48,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:13:48,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:13:48,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:13:48,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:13:48,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:13:48,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:13:48,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:13:48,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:13:48,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:13:48,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:13:48,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:13:48,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:13:48,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:13:48,370 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:13:48,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:13:48,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:13:48,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:13:48,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:13:48,389 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:13:48,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:13:48,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:13:48,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:13:48,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:13:48,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:13:48,400 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:13:48,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:13:48,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:13:48,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:13:48,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:13:48,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:13:48,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:13:48,406 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:13:48,469 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:13:48,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:13:48,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:13:48,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:13:48,477 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:13:48,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:13:48,478 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:13:48,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:13:48,479 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:13:48,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:13:48,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:13:48,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:13:48,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:13:48,482 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:13:48,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:13:48,482 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:13:48,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:13:48,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:13:48,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:13:48,484 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:13:48,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:13:48,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:13:48,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:13:48,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:13:48,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:13:48,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:13:48,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:13:48,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:13:48,487 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:13:48,487 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:13:48,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:13:49,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:13:49,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:13:49,057 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:13:49,058 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:13:49,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2020-10-26 19:13:49,146 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cee864c5/7866d6de83474826a1d1db4948e969ec/FLAG8d0e1b0f6 [2020-10-26 19:13:49,775 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:13:49,776 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2020-10-26 19:13:49,785 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cee864c5/7866d6de83474826a1d1db4948e969ec/FLAG8d0e1b0f6 [2020-10-26 19:13:50,132 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cee864c5/7866d6de83474826a1d1db4948e969ec [2020-10-26 19:13:50,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:13:50,147 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:13:50,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:13:50,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:13:50,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:13:50,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:13:50" (1/1) ... [2020-10-26 19:13:50,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d832736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:50, skipping insertion in model container [2020-10-26 19:13:50,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:13:50" (1/1) ... [2020-10-26 19:13:50,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:13:50,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:13:50,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:13:50,438 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:13:50,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:13:50,479 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:13:50,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:50 WrapperNode [2020-10-26 19:13:50,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:13:50,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:13:50,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:13:50,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:13:50,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:50" (1/1) ... [2020-10-26 19:13:50,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:50" (1/1) ... [2020-10-26 19:13:50,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:50" (1/1) ... [2020-10-26 19:13:50,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:50" (1/1) ... [2020-10-26 19:13:50,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:50" (1/1) ... [2020-10-26 19:13:50,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:50" (1/1) ... [2020-10-26 19:13:50,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:50" (1/1) ... [2020-10-26 19:13:50,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:13:50,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:13:50,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:13:50,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:13:50,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:13:50,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:13:50,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:13:50,597 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:13:50,597 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:13:50,597 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:13:50,597 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:13:50,597 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:13:50,598 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:13:50,598 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:13:50,598 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:13:50,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:13:50,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:13:50,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:13:50,598 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:13:50,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:13:50,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:13:50,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:13:50,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:13:50,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:13:50,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:13:51,182 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:13:51,182 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-26 19:13:51,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:13:51 BoogieIcfgContainer [2020-10-26 19:13:51,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:13:51,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:13:51,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:13:51,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:13:51,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:13:50" (1/3) ... [2020-10-26 19:13:51,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cd7a800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:13:51, skipping insertion in model container [2020-10-26 19:13:51,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:13:50" (2/3) ... [2020-10-26 19:13:51,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cd7a800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:13:51, skipping insertion in model container [2020-10-26 19:13:51,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:13:51" (3/3) ... [2020-10-26 19:13:51,198 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2020-10-26 19:13:51,212 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:13:51,223 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:13:51,238 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:13:51,278 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:13:51,278 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:13:51,278 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:13:51,278 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:13:51,278 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:13:51,279 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:13:51,279 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:13:51,279 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:13:51,305 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-26 19:13:51,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 19:13:51,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:51,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:51,314 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:51,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:51,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1730802319, now seen corresponding path program 1 times [2020-10-26 19:13:51,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:51,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531793719] [2020-10-26 19:13:51,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:51,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:51,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:51,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:51,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:13:51,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:51,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-26 19:13:51,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:51,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:51,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:13:51,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:51,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:13:51,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:51,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:51,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:51,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:51,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:51,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:51,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:13:51,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:51,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:51,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:51,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:51,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:51,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531793719] [2020-10-26 19:13:51,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:13:51,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:13:51,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037540504] [2020-10-26 19:13:51,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:13:51,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:51,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:13:51,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:13:51,854 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-26 19:13:51,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:51,971 INFO L93 Difference]: Finished difference Result 63 states and 89 transitions. [2020-10-26 19:13:51,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:13:51,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-26 19:13:51,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:51,981 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:13:51,982 INFO L226 Difference]: Without dead ends: 29 [2020-10-26 19:13:51,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:13:52,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-26 19:13:52,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-26 19:13:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-26 19:13:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-26 19:13:52,029 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2020-10-26 19:13:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:52,029 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-26 19:13:52,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:13:52,030 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-26 19:13:52,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 19:13:52,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:52,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:52,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:13:52,032 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:52,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:52,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1181149324, now seen corresponding path program 1 times [2020-10-26 19:13:52,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:52,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210345893] [2020-10-26 19:13:52,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:52,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:52,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:52,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:52,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:52,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:52,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:13:52,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:13:52,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-26 19:13:52,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:52,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:13:52,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:52,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:13:52,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:52,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:52,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:52,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:52,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:52,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:52,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:13:52,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:52,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:52,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:52,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:52,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:13:52,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210345893] [2020-10-26 19:13:52,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:13:52,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:13:52,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951461698] [2020-10-26 19:13:52,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:13:52,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:52,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:13:52,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:13:52,415 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2020-10-26 19:13:52,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:52,552 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2020-10-26 19:13:52,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:13:52,553 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-26 19:13:52,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:52,554 INFO L225 Difference]: With dead ends: 57 [2020-10-26 19:13:52,554 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:13:52,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:13:52,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:13:52,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-10-26 19:13:52,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-26 19:13:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-26 19:13:52,564 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 18 [2020-10-26 19:13:52,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:52,565 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-26 19:13:52,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:13:52,565 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-26 19:13:52,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:13:52,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:52,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:52,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:13:52,566 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:52,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:52,567 INFO L82 PathProgramCache]: Analyzing trace with hash -873847476, now seen corresponding path program 1 times [2020-10-26 19:13:52,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:52,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31052731] [2020-10-26 19:13:52,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:52,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:52,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:52,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:52,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:52,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:52,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:53,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:53,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:13:53,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:13:53,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 727 [2020-10-26 19:13:53,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:53,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:13:53,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:53,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:13:53,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:53,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:53,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:53,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:53,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:53,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:53,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:13:53,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:53,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:53,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:53,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:53,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:13:53,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31052731] [2020-10-26 19:13:53,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:53,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:13:53,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534674470] [2020-10-26 19:13:53,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:13:53,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:53,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:13:53,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:13:53,377 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 5 states. [2020-10-26 19:13:53,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:53,482 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2020-10-26 19:13:53,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:13:53,483 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-26 19:13:53,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:53,484 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:13:53,484 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:13:53,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:13:53,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:13:53,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-10-26 19:13:53,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:13:53,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-26 19:13:53,493 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 23 [2020-10-26 19:13:53,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:53,494 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-26 19:13:53,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:13:53,494 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-26 19:13:53,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:13:53,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:53,495 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:53,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:13:53,496 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:53,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:53,496 INFO L82 PathProgramCache]: Analyzing trace with hash -581273942, now seen corresponding path program 2 times [2020-10-26 19:13:53,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:53,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019884648] [2020-10-26 19:13:53,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:53,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:53,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:53,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:53,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:53,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:53,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:54,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:54,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:13:54,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:13:54,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 757 [2020-10-26 19:13:54,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:54,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:13:54,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:54,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:13:54,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:54,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:54,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:54,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:54,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:54,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:54,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:13:54,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:54,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:54,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:54,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:54,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:13:54,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019884648] [2020-10-26 19:13:54,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:54,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:13:54,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035754890] [2020-10-26 19:13:54,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:13:54,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:54,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:13:54,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:13:54,334 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 6 states. [2020-10-26 19:13:54,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:54,458 INFO L93 Difference]: Finished difference Result 74 states and 91 transitions. [2020-10-26 19:13:54,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:13:54,459 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-26 19:13:54,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:54,461 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:13:54,462 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:13:54,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:13:54,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:13:54,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 35. [2020-10-26 19:13:54,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 19:13:54,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-26 19:13:54,474 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 25 [2020-10-26 19:13:54,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:54,475 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-26 19:13:54,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:13:54,475 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-26 19:13:54,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:13:54,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:54,476 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:54,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:13:54,477 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:54,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:54,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1409017992, now seen corresponding path program 3 times [2020-10-26 19:13:54,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:54,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430525010] [2020-10-26 19:13:54,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:54,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:54,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:54,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:54,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:54,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:54,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:55,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:55,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:13:55,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:13:55,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1104 [2020-10-26 19:13:55,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:55,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:13:55,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:55,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:13:55,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:55,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:55,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:55,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:55,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:55,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:55,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:55,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:55,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:55,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:55,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:55,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:13:55,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430525010] [2020-10-26 19:13:55,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:55,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:13:55,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109681128] [2020-10-26 19:13:55,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:13:55,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:55,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:13:55,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:13:55,682 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 7 states. [2020-10-26 19:13:55,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:55,831 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2020-10-26 19:13:55,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:13:55,832 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-26 19:13:55,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:55,834 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:13:55,834 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:13:55,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:13:55,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:13:55,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 37. [2020-10-26 19:13:55,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:13:55,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-26 19:13:55,844 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 27 [2020-10-26 19:13:55,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:55,845 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-26 19:13:55,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:13:55,845 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-26 19:13:55,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:13:55,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:55,846 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:55,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:13:55,847 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:55,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:55,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1475847450, now seen corresponding path program 4 times [2020-10-26 19:13:55,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:55,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13783290] [2020-10-26 19:13:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:55,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:55,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:55,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:55,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:55,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:56,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:57,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:13:57,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:13:57,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1566 [2020-10-26 19:13:57,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:57,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:13:57,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:13:57,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:13:57,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:57,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:57,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:57,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:57,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:57,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:57,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:57,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:57,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:57,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:57,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-26 19:13:57,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13783290] [2020-10-26 19:13:57,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:57,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:13:57,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291836149] [2020-10-26 19:13:57,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:13:57,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:57,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:13:57,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:13:57,505 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 6 states. [2020-10-26 19:13:57,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:57,611 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2020-10-26 19:13:57,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:13:57,612 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-26 19:13:57,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:57,613 INFO L225 Difference]: With dead ends: 61 [2020-10-26 19:13:57,613 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:13:57,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:13:57,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:13:57,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-10-26 19:13:57,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:13:57,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-10-26 19:13:57,621 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 29 [2020-10-26 19:13:57,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:57,621 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-10-26 19:13:57,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:13:57,622 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-10-26 19:13:57,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:13:57,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:57,623 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:57,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:13:57,623 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:57,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:57,624 INFO L82 PathProgramCache]: Analyzing trace with hash -2060235820, now seen corresponding path program 5 times [2020-10-26 19:13:57,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:57,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714973374] [2020-10-26 19:13:57,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:57,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:57,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:58,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:58,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:02,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:02,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:14:02,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:14:02,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4660 [2020-10-26 19:14:02,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:02,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:14:02,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:02,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:14:02,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:02,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:02,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:02,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:02,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:02,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:02,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:14:02,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:02,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:02,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:02,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:02,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:14:02,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714973374] [2020-10-26 19:14:02,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:02,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:14:02,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693977311] [2020-10-26 19:14:02,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:14:02,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:02,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:14:02,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:14:02,408 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 8 states. [2020-10-26 19:14:02,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:02,566 INFO L93 Difference]: Finished difference Result 100 states and 126 transitions. [2020-10-26 19:14:02,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:14:02,567 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-26 19:14:02,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:02,569 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:14:02,569 INFO L226 Difference]: Without dead ends: 73 [2020-10-26 19:14:02,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:14:02,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-26 19:14:02,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 44. [2020-10-26 19:14:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 19:14:02,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-26 19:14:02,585 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 32 [2020-10-26 19:14:02,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:02,587 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-26 19:14:02,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:14:02,587 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-26 19:14:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:14:02,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:02,590 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:02,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:14:02,590 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:02,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:02,592 INFO L82 PathProgramCache]: Analyzing trace with hash 25535542, now seen corresponding path program 6 times [2020-10-26 19:14:02,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:02,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362578730] [2020-10-26 19:14:02,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:02,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:02,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:02,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:02,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:03,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:03,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:03,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:03,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:03,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:07,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:07,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:14:07,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:14:07,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4662 [2020-10-26 19:14:07,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:07,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:14:07,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:07,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:14:07,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:07,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:07,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:07,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:07,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:07,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:07,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:14:07,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:07,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:07,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:07,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:07,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:14:07,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362578730] [2020-10-26 19:14:07,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:07,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:14:07,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279588162] [2020-10-26 19:14:07,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:14:07,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:07,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:14:07,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:14:07,366 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 9 states. [2020-10-26 19:14:07,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:07,544 INFO L93 Difference]: Finished difference Result 114 states and 145 transitions. [2020-10-26 19:14:07,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:14:07,545 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-26 19:14:07,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:07,546 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:14:07,546 INFO L226 Difference]: Without dead ends: 87 [2020-10-26 19:14:07,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:14:07,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-26 19:14:07,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 46. [2020-10-26 19:14:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:14:07,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-26 19:14:07,556 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 34 [2020-10-26 19:14:07,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:07,556 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-26 19:14:07,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:14:07,556 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-26 19:14:07,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:14:07,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:07,557 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:07,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:14:07,557 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:07,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:07,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1297912808, now seen corresponding path program 7 times [2020-10-26 19:14:07,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:07,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989977874] [2020-10-26 19:14:07,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:07,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:07,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:07,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:07,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:08,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:08,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:08,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:08,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:08,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:12,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:12,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:14:12,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:14:12,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4774 [2020-10-26 19:14:12,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:12,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:14:12,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:12,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:14:12,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:12,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:12,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:12,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:12,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:12,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:12,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:12,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:12,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:12,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:12,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:12,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-26 19:14:12,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989977874] [2020-10-26 19:14:12,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:12,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:14:12,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596456091] [2020-10-26 19:14:12,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:14:12,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:12,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:14:12,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:14:12,464 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 7 states. [2020-10-26 19:14:12,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:12,585 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2020-10-26 19:14:12,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:14:12,585 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-26 19:14:12,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:12,586 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:14:12,586 INFO L226 Difference]: Without dead ends: 55 [2020-10-26 19:14:12,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:14:12,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-26 19:14:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-10-26 19:14:12,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:14:12,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-10-26 19:14:12,597 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 36 [2020-10-26 19:14:12,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:12,598 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-10-26 19:14:12,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:14:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-10-26 19:14:12,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:14:12,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:12,600 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:12,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:14:12,600 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:12,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:12,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1198959262, now seen corresponding path program 8 times [2020-10-26 19:14:12,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:12,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297223987] [2020-10-26 19:14:12,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:12,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:12,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:12,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:12,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:12,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:14,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:14,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:15,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:15,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:15,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:15,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:15,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:17,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:17,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:14:17,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:14:17,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:14:17,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:17,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:14:17,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:17,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:14:17,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:17,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:17,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:17,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:17,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:17,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:17,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:17,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:17,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:17,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:17,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:17,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:14:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-26 19:14:17,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297223987] [2020-10-26 19:14:17,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:17,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:14:17,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596816631] [2020-10-26 19:14:17,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:14:17,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:17,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:14:17,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:14:17,745 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 8 states. [2020-10-26 19:14:17,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:17,876 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2020-10-26 19:14:17,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:14:17,877 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-26 19:14:17,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:17,878 INFO L225 Difference]: With dead ends: 75 [2020-10-26 19:14:17,878 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:14:17,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:14:17,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:14:17,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-10-26 19:14:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:14:17,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-10-26 19:14:17,897 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 39 [2020-10-26 19:14:17,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:17,897 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-10-26 19:14:17,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:14:17,898 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-10-26 19:14:17,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:14:17,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:17,901 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:17,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:14:17,901 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:17,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:17,902 INFO L82 PathProgramCache]: Analyzing trace with hash 378564568, now seen corresponding path program 9 times [2020-10-26 19:14:17,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:17,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155017206] [2020-10-26 19:14:17,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:17,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:17,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:17,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:17,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:17,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:18,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:18,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:18,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:18,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:18,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:18,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:18,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:19,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:22,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:22,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:14:22,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-26 19:14:22,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:14:22,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:22,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:14:22,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:22,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:14:22,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:23,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:23,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:23,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:23,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:23,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:23,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:23,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:23,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:23,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:23,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:23,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:23,031 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-26 19:14:23,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155017206] [2020-10-26 19:14:23,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:23,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:14:23,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068166581] [2020-10-26 19:14:23,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:14:23,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:23,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:14:23,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:14:23,033 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand 10 states. [2020-10-26 19:14:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:23,208 INFO L93 Difference]: Finished difference Result 124 states and 158 transitions. [2020-10-26 19:14:23,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:14:23,208 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-26 19:14:23,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:23,211 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:14:23,212 INFO L226 Difference]: Without dead ends: 87 [2020-10-26 19:14:23,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:14:23,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-26 19:14:23,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 58. [2020-10-26 19:14:23,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:14:23,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2020-10-26 19:14:23,222 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 42 [2020-10-26 19:14:23,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:23,222 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2020-10-26 19:14:23,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:14:23,222 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2020-10-26 19:14:23,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-26 19:14:23,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:23,223 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:23,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:14:23,224 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:23,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:23,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1902196154, now seen corresponding path program 10 times [2020-10-26 19:14:23,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:23,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232371087] [2020-10-26 19:14:23,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:23,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:23,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:23,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:23,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:23,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:23,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:24,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:24,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:24,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:24,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:24,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:25,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:25,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:28,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:28,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:14:28,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-26 19:14:28,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:14:28,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:28,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:14:28,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:28,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:14:28,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:28,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:28,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:28,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:28,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:28,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:28,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:28,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:28,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:28,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:28,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:28,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-26 19:14:28,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232371087] [2020-10-26 19:14:28,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:28,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:14:28,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598865765] [2020-10-26 19:14:28,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:14:28,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:28,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:14:28,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:14:28,353 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand 9 states. [2020-10-26 19:14:28,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:28,513 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2020-10-26 19:14:28,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:14:28,514 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-10-26 19:14:28,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:28,514 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:14:28,515 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 19:14:28,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:14:28,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 19:14:28,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2020-10-26 19:14:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:14:28,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-10-26 19:14:28,523 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 44 [2020-10-26 19:14:28,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:28,524 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-10-26 19:14:28,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:14:28,524 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-10-26 19:14:28,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:14:28,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:28,525 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:28,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:14:28,525 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:28,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:28,526 INFO L82 PathProgramCache]: Analyzing trace with hash -2141941632, now seen corresponding path program 11 times [2020-10-26 19:14:28,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:28,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586433369] [2020-10-26 19:14:28,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:28,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:28,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:28,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:28,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:28,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:28,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:28,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:28,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:28,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:28,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:28,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:28,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:28,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:29,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:29,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:29,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:30,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:30,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:33,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:33,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:14:33,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-26 19:14:33,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:14:33,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:33,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:14:33,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:33,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:14:33,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:33,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:33,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:33,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:33,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:33,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:33,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:33,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:33,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:33,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:33,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:33,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 19:14:33,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586433369] [2020-10-26 19:14:33,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:33,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:14:33,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792107602] [2020-10-26 19:14:33,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:14:33,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:33,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:14:33,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:14:33,685 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 11 states. [2020-10-26 19:14:33,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:33,878 INFO L93 Difference]: Finished difference Result 136 states and 174 transitions. [2020-10-26 19:14:33,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:14:33,878 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-26 19:14:33,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:33,879 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:14:33,879 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:14:33,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:14:33,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:14:33,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 65. [2020-10-26 19:14:33,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:14:33,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-10-26 19:14:33,888 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 47 [2020-10-26 19:14:33,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:33,888 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-10-26 19:14:33,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:14:33,889 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-10-26 19:14:33,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:14:33,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:33,889 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:33,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:14:33,890 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:33,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:33,890 INFO L82 PathProgramCache]: Analyzing trace with hash 333326302, now seen corresponding path program 12 times [2020-10-26 19:14:33,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:33,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595898745] [2020-10-26 19:14:33,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:33,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:33,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:33,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:33,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:33,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:34,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:34,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:34,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:34,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:34,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:34,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:34,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:34,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:35,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:35,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:36,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:38,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:38,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:14:38,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-26 19:14:38,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:14:38,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:38,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:14:38,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:38,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:14:38,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:39,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:39,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:39,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:39,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:39,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:39,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:39,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:39,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:39,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:39,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:39,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 19:14:39,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595898745] [2020-10-26 19:14:39,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:39,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:14:39,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096935583] [2020-10-26 19:14:39,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:14:39,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:39,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:14:39,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:14:39,053 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 12 states. [2020-10-26 19:14:39,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:39,324 INFO L93 Difference]: Finished difference Result 150 states and 193 transitions. [2020-10-26 19:14:39,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:14:39,325 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-26 19:14:39,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:39,327 INFO L225 Difference]: With dead ends: 150 [2020-10-26 19:14:39,327 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:14:39,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:14:39,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:14:39,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 67. [2020-10-26 19:14:39,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:14:39,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2020-10-26 19:14:39,336 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 49 [2020-10-26 19:14:39,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:39,336 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2020-10-26 19:14:39,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:14:39,336 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2020-10-26 19:14:39,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:14:39,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:39,337 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:39,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:14:39,337 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:39,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:39,338 INFO L82 PathProgramCache]: Analyzing trace with hash -346071108, now seen corresponding path program 13 times [2020-10-26 19:14:39,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:39,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748459057] [2020-10-26 19:14:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:39,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:39,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:39,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:39,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:39,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:39,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:39,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:39,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:40,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:40,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:40,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:40,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:40,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:40,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:41,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:41,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:41,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:41,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:44,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:44,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:14:44,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-26 19:14:44,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:14:44,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:44,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:14:44,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:44,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:14:44,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:44,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:44,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:44,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:44,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:44,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:44,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:14:44,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:44,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:44,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:44,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:44,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 19:14:44,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748459057] [2020-10-26 19:14:44,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:44,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:14:44,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725469424] [2020-10-26 19:14:44,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:14:44,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:44,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:14:44,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:14:44,507 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 13 states. [2020-10-26 19:14:44,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:44,871 INFO L93 Difference]: Finished difference Result 164 states and 212 transitions. [2020-10-26 19:14:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:14:44,872 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-26 19:14:44,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:44,874 INFO L225 Difference]: With dead ends: 164 [2020-10-26 19:14:44,874 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:14:44,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:14:44,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:14:44,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 69. [2020-10-26 19:14:44,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 19:14:44,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2020-10-26 19:14:44,885 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 51 [2020-10-26 19:14:44,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:44,885 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2020-10-26 19:14:44,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:14:44,886 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2020-10-26 19:14:44,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:14:44,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:44,886 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:44,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:14:44,887 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:44,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:44,887 INFO L82 PathProgramCache]: Analyzing trace with hash -411953126, now seen corresponding path program 14 times [2020-10-26 19:14:44,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:44,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122586827] [2020-10-26 19:14:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:44,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:44,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:44,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:44,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:44,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:45,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:45,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:45,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:45,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:45,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:46,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:46,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:46,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:46,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:46,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:47,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:49,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:49,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:14:49,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-26 19:14:49,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:14:49,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:49,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:14:49,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:49,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:14:49,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:50,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:50,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:50,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:50,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:50,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:50,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:14:50,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:50,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:50,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:50,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:50,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 19:14:50,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122586827] [2020-10-26 19:14:50,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:50,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:14:50,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107433293] [2020-10-26 19:14:50,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:14:50,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:50,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:14:50,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:14:50,093 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 14 states. [2020-10-26 19:14:50,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:50,423 INFO L93 Difference]: Finished difference Result 178 states and 231 transitions. [2020-10-26 19:14:50,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:14:50,426 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-26 19:14:50,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:50,427 INFO L225 Difference]: With dead ends: 178 [2020-10-26 19:14:50,428 INFO L226 Difference]: Without dead ends: 136 [2020-10-26 19:14:50,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:14:50,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-26 19:14:50,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 71. [2020-10-26 19:14:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:14:50,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2020-10-26 19:14:50,443 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 53 [2020-10-26 19:14:50,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:50,444 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2020-10-26 19:14:50,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:14:50,444 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2020-10-26 19:14:50,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:14:50,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:50,445 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:50,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:14:50,445 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:50,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:50,446 INFO L82 PathProgramCache]: Analyzing trace with hash 699937016, now seen corresponding path program 15 times [2020-10-26 19:14:50,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:50,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367789855] [2020-10-26 19:14:50,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:50,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:50,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:50,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:50,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:50,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:50,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:50,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:51,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:51,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:51,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:51,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:51,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:51,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:52,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:52,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:53,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:55,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:55,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:14:55,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-26 19:14:55,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:14:55,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:55,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:14:55,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:14:55,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:14:55,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:55,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:14:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:55,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:55,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:14:55,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:14:55,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:14:55,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:14:55,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:14:55,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:14:55,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:14:55,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:14:55,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:14:55,689 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 19:14:55,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367789855] [2020-10-26 19:14:55,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:14:55,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:14:55,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035334328] [2020-10-26 19:14:55,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:14:55,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:14:55,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:14:55,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:14:55,699 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand 15 states. [2020-10-26 19:14:56,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:14:56,020 INFO L93 Difference]: Finished difference Result 192 states and 250 transitions. [2020-10-26 19:14:56,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:14:56,021 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-10-26 19:14:56,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:14:56,022 INFO L225 Difference]: With dead ends: 192 [2020-10-26 19:14:56,022 INFO L226 Difference]: Without dead ends: 150 [2020-10-26 19:14:56,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:14:56,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-26 19:14:56,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 73. [2020-10-26 19:14:56,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:14:56,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2020-10-26 19:14:56,034 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 55 [2020-10-26 19:14:56,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:14:56,035 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2020-10-26 19:14:56,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:14:56,035 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2020-10-26 19:14:56,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:14:56,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:14:56,036 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:14:56,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:14:56,036 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:14:56,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:14:56,036 INFO L82 PathProgramCache]: Analyzing trace with hash -220493226, now seen corresponding path program 16 times [2020-10-26 19:14:56,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:14:56,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272945917] [2020-10-26 19:14:56,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:14:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:14:56,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:56,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:56,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:56,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:56,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:56,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:56,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:56,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:56,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:56,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:56,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:56,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:56,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:56,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:56,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:56,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:57,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:14:57,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:01,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:01,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:15:01,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-26 19:15:01,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:15:01,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:01,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:15:01,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:01,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:15:01,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:01,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:01,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:01,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:01,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:01,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:01,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:15:01,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:01,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:01,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:01,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:01,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 19:15:01,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272945917] [2020-10-26 19:15:01,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:01,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:15:01,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170392350] [2020-10-26 19:15:01,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:15:01,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:01,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:15:01,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:15:01,312 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand 16 states. [2020-10-26 19:15:01,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:01,822 INFO L93 Difference]: Finished difference Result 206 states and 269 transitions. [2020-10-26 19:15:01,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:15:01,824 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-10-26 19:15:01,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:01,825 INFO L225 Difference]: With dead ends: 206 [2020-10-26 19:15:01,825 INFO L226 Difference]: Without dead ends: 164 [2020-10-26 19:15:01,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:15:01,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-26 19:15:01,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 75. [2020-10-26 19:15:01,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:15:01,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2020-10-26 19:15:01,837 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 57 [2020-10-26 19:15:01,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:01,837 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2020-10-26 19:15:01,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:15:01,838 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2020-10-26 19:15:01,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:15:01,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:01,839 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:01,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:15:01,839 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:01,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:01,840 INFO L82 PathProgramCache]: Analyzing trace with hash 9307188, now seen corresponding path program 17 times [2020-10-26 19:15:01,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:01,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44646083] [2020-10-26 19:15:01,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:01,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:01,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:01,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:01,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:02,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:02,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:02,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:02,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:02,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:02,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:02,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:02,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:03,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:03,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:03,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:03,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:03,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:06,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:06,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:15:06,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-26 19:15:06,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:15:06,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:06,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:15:06,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:06,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-26 19:15:06,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:06,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:06,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:06,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:06,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:06,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:06,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:06,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:06,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:06,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:06,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:06,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-26 19:15:06,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44646083] [2020-10-26 19:15:06,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:06,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:15:06,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350706049] [2020-10-26 19:15:07,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:15:07,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:07,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:15:07,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:15:07,003 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand 10 states. [2020-10-26 19:15:07,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:07,182 INFO L93 Difference]: Finished difference Result 99 states and 118 transitions. [2020-10-26 19:15:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:15:07,182 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-26 19:15:07,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:07,183 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:15:07,183 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:15:07,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:15:07,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:15:07,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2020-10-26 19:15:07,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-26 19:15:07,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2020-10-26 19:15:07,195 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 59 [2020-10-26 19:15:07,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:07,195 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2020-10-26 19:15:07,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:15:07,196 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2020-10-26 19:15:07,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 19:15:07,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:07,205 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:07,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:15:07,205 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:07,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:07,205 INFO L82 PathProgramCache]: Analyzing trace with hash -276531258, now seen corresponding path program 18 times [2020-10-26 19:15:07,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:07,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096725007] [2020-10-26 19:15:07,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:07,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:07,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:07,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:07,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:07,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:07,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:07,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:07,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:08,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:08,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:08,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:08,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:09,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:09,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:10,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:10,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:10,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:11,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:12,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:12,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:15:12,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-26 19:15:12,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:15:12,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:12,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:15:12,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:12,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:15:12,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:12,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:12,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:12,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:12,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:12,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:12,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:15:12,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:12,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:12,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:12,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:12,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:12,428 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 19:15:12,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096725007] [2020-10-26 19:15:12,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:12,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:15:12,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709127552] [2020-10-26 19:15:12,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:15:12,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:12,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:15:12,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:15:12,430 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand 17 states. [2020-10-26 19:15:12,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:12,797 INFO L93 Difference]: Finished difference Result 218 states and 285 transitions. [2020-10-26 19:15:12,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:15:12,798 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2020-10-26 19:15:12,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:12,799 INFO L225 Difference]: With dead ends: 218 [2020-10-26 19:15:12,800 INFO L226 Difference]: Without dead ends: 171 [2020-10-26 19:15:12,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:15:12,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-26 19:15:12,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 82. [2020-10-26 19:15:12,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:15:12,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2020-10-26 19:15:12,814 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 62 [2020-10-26 19:15:12,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:12,814 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2020-10-26 19:15:12,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:15:12,814 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2020-10-26 19:15:12,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 19:15:12,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:12,815 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:12,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:15:12,815 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:12,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:12,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1773569880, now seen corresponding path program 19 times [2020-10-26 19:15:12,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:12,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100854726] [2020-10-26 19:15:12,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:12,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:12,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:12,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:13,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:13,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:13,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:13,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:13,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:17,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:17,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 19:15:17,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:15:17,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:15:17,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:17,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:15:17,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:17,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:15:17,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:18,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:18,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:18,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:18,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:18,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:18,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:18,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:18,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:18,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:18,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:18,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 19:15:18,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100854726] [2020-10-26 19:15:18,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:18,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:15:18,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973379165] [2020-10-26 19:15:18,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:15:18,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:18,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:15:18,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:15:18,070 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand 18 states. [2020-10-26 19:15:18,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:18,492 INFO L93 Difference]: Finished difference Result 232 states and 304 transitions. [2020-10-26 19:15:18,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:15:18,493 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 64 [2020-10-26 19:15:18,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:18,494 INFO L225 Difference]: With dead ends: 232 [2020-10-26 19:15:18,494 INFO L226 Difference]: Without dead ends: 185 [2020-10-26 19:15:18,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:15:18,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-26 19:15:18,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 84. [2020-10-26 19:15:18,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:15:18,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2020-10-26 19:15:18,511 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 64 [2020-10-26 19:15:18,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:18,511 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2020-10-26 19:15:18,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:15:18,511 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2020-10-26 19:15:18,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:15:18,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:18,512 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:18,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:15:18,512 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:18,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:18,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1613641462, now seen corresponding path program 20 times [2020-10-26 19:15:18,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:18,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360460965] [2020-10-26 19:15:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:18,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:18,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:18,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:18,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:18,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:18,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:18,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:19,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:23,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:23,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 19:15:23,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:15:23,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:15:23,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:23,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:15:23,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:23,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:15:23,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:23,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:23,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:23,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:23,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:23,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:23,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:23,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:23,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:23,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:23,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:23,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 19:15:23,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360460965] [2020-10-26 19:15:23,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:23,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:15:23,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709990189] [2020-10-26 19:15:23,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:15:23,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:23,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:15:23,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:15:23,821 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand 19 states. [2020-10-26 19:15:24,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:24,331 INFO L93 Difference]: Finished difference Result 246 states and 323 transitions. [2020-10-26 19:15:24,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:15:24,334 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 66 [2020-10-26 19:15:24,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:24,335 INFO L225 Difference]: With dead ends: 246 [2020-10-26 19:15:24,335 INFO L226 Difference]: Without dead ends: 199 [2020-10-26 19:15:24,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:15:24,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-26 19:15:24,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 86. [2020-10-26 19:15:24,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:15:24,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2020-10-26 19:15:24,348 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 66 [2020-10-26 19:15:24,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:24,349 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2020-10-26 19:15:24,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:15:24,349 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2020-10-26 19:15:24,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-26 19:15:24,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:24,350 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:24,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:15:24,350 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:24,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:24,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1753712876, now seen corresponding path program 21 times [2020-10-26 19:15:24,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:24,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445689994] [2020-10-26 19:15:24,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:24,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:24,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:24,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:24,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:24,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:24,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:25,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:29,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:29,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 19:15:29,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:15:29,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:15:29,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:29,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:15:29,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:29,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:15:29,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:29,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:29,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:29,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:29,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:29,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:29,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:29,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:29,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:29,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:29,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:29,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 19:15:29,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445689994] [2020-10-26 19:15:29,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:29,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:15:29,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699510909] [2020-10-26 19:15:29,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:15:29,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:29,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:15:29,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:15:29,653 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand 20 states. [2020-10-26 19:15:30,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:30,083 INFO L93 Difference]: Finished difference Result 260 states and 342 transitions. [2020-10-26 19:15:30,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:15:30,083 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 68 [2020-10-26 19:15:30,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:30,085 INFO L225 Difference]: With dead ends: 260 [2020-10-26 19:15:30,085 INFO L226 Difference]: Without dead ends: 213 [2020-10-26 19:15:30,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:15:30,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-26 19:15:30,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 88. [2020-10-26 19:15:30,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:15:30,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 103 transitions. [2020-10-26 19:15:30,098 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 103 transitions. Word has length 68 [2020-10-26 19:15:30,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:30,098 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 103 transitions. [2020-10-26 19:15:30,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:15:30,098 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 103 transitions. [2020-10-26 19:15:30,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:15:30,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:30,099 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:30,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:15:30,100 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:30,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:30,100 INFO L82 PathProgramCache]: Analyzing trace with hash -624109490, now seen corresponding path program 22 times [2020-10-26 19:15:30,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:30,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392992430] [2020-10-26 19:15:30,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:30,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:30,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:30,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:30,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:30,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:30,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:30,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:35,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:35,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 19:15:35,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:15:35,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:15:35,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:35,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:15:35,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:35,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:15:35,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:35,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:35,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:35,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:35,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:35,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:35,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:35,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:35,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:35,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:35,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:35,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 19:15:35,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392992430] [2020-10-26 19:15:35,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:35,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:15:35,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628547193] [2020-10-26 19:15:35,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:15:35,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:35,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:15:35,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:15:35,447 INFO L87 Difference]: Start difference. First operand 88 states and 103 transitions. Second operand 21 states. [2020-10-26 19:15:36,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:36,009 INFO L93 Difference]: Finished difference Result 274 states and 361 transitions. [2020-10-26 19:15:36,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:15:36,009 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 70 [2020-10-26 19:15:36,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:36,011 INFO L225 Difference]: With dead ends: 274 [2020-10-26 19:15:36,011 INFO L226 Difference]: Without dead ends: 227 [2020-10-26 19:15:36,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:15:36,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-26 19:15:36,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 90. [2020-10-26 19:15:36,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:15:36,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2020-10-26 19:15:36,023 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 70 [2020-10-26 19:15:36,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:36,023 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2020-10-26 19:15:36,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:15:36,023 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2020-10-26 19:15:36,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:15:36,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:36,024 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:36,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:15:36,024 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:36,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:36,025 INFO L82 PathProgramCache]: Analyzing trace with hash -788801744, now seen corresponding path program 23 times [2020-10-26 19:15:36,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:36,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839256608] [2020-10-26 19:15:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:36,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:36,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:36,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:36,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:36,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:36,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:36,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:41,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:41,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:15:41,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:15:41,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:15:41,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:41,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:15:41,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:41,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:15:41,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:41,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:41,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:41,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:41,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:41,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:41,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:41,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:41,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:41,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:41,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:41,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:41,399 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 19:15:41,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839256608] [2020-10-26 19:15:41,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:41,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:15:41,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701931120] [2020-10-26 19:15:41,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:15:41,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:41,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:15:41,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:15:41,402 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand 22 states. [2020-10-26 19:15:41,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:41,989 INFO L93 Difference]: Finished difference Result 288 states and 380 transitions. [2020-10-26 19:15:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:15:41,990 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2020-10-26 19:15:41,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:41,992 INFO L225 Difference]: With dead ends: 288 [2020-10-26 19:15:41,992 INFO L226 Difference]: Without dead ends: 241 [2020-10-26 19:15:41,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:15:41,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-26 19:15:42,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 92. [2020-10-26 19:15:42,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-26 19:15:42,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2020-10-26 19:15:42,008 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 72 [2020-10-26 19:15:42,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:42,008 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2020-10-26 19:15:42,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:15:42,008 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2020-10-26 19:15:42,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:15:42,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:42,009 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:42,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:15:42,009 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:42,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:42,010 INFO L82 PathProgramCache]: Analyzing trace with hash -144267886, now seen corresponding path program 24 times [2020-10-26 19:15:42,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:42,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654514562] [2020-10-26 19:15:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:42,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:42,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:42,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:42,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:42,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:42,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:42,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:42,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:42,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:43,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:43,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:43,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:43,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:43,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:45,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:46,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:47,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:47,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:15:47,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-26 19:15:47,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:15:47,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:47,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:15:47,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:47,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:15:47,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:47,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:47,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:47,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:47,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:47,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:47,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:47,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:47,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:47,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:47,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:47,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-26 19:15:47,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654514562] [2020-10-26 19:15:47,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:47,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:15:47,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770737387] [2020-10-26 19:15:47,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:15:47,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:47,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:15:47,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:15:47,167 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand 11 states. [2020-10-26 19:15:47,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:47,386 INFO L93 Difference]: Finished difference Result 116 states and 137 transitions. [2020-10-26 19:15:47,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:15:47,387 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 74 [2020-10-26 19:15:47,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:47,388 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:15:47,388 INFO L226 Difference]: Without dead ends: 101 [2020-10-26 19:15:47,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:15:47,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-26 19:15:47,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2020-10-26 19:15:47,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:15:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2020-10-26 19:15:47,403 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 74 [2020-10-26 19:15:47,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:47,404 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2020-10-26 19:15:47,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:15:47,404 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2020-10-26 19:15:47,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:15:47,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:47,404 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:47,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:15:47,405 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:47,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:47,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1291390552, now seen corresponding path program 25 times [2020-10-26 19:15:47,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:47,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217675285] [2020-10-26 19:15:47,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:47,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:47,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:47,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:47,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:47,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:47,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:50,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:50,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:50,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:51,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:51,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:52,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:52,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:15:52,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:15:52,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:15:52,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:52,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:15:52,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:52,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:15:52,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:52,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:52,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:52,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:52,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:52,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:52,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:15:52,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:52,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:52,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:52,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:52,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-26 19:15:52,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217675285] [2020-10-26 19:15:52,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:52,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:15:52,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222241079] [2020-10-26 19:15:52,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:15:52,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:52,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:15:52,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:15:52,808 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand 23 states. [2020-10-26 19:15:53,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:53,431 INFO L93 Difference]: Finished difference Result 300 states and 396 transitions. [2020-10-26 19:15:53,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:15:53,432 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 77 [2020-10-26 19:15:53,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:53,433 INFO L225 Difference]: With dead ends: 300 [2020-10-26 19:15:53,433 INFO L226 Difference]: Without dead ends: 248 [2020-10-26 19:15:53,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:15:53,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-26 19:15:53,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 99. [2020-10-26 19:15:53,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:15:53,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2020-10-26 19:15:53,447 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 77 [2020-10-26 19:15:53,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:53,448 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2020-10-26 19:15:53,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:15:53,448 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2020-10-26 19:15:53,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:15:53,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:53,449 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:53,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:15:53,449 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:53,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:53,450 INFO L82 PathProgramCache]: Analyzing trace with hash 745001094, now seen corresponding path program 26 times [2020-10-26 19:15:53,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:53,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142039988] [2020-10-26 19:15:53,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:53,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:53,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:53,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:54,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:54,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:54,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:54,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:54,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:54,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:54,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:54,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:55,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:55,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:55,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:55,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:55,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:56,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:56,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:58,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:58,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:15:58,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-26 19:15:58,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:15:58,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:58,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:15:58,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:15:58,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-26 19:15:58,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:58,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:15:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:58,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:58,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:15:58,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:15:58,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:15:58,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:15:58,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:15:58,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:15:58,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:15:58,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:15:58,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:15:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-26 19:15:58,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142039988] [2020-10-26 19:15:58,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:15:58,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:15:58,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701045156] [2020-10-26 19:15:58,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:15:58,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:15:58,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:15:58,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:15:58,641 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand 12 states. [2020-10-26 19:15:58,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:15:58,876 INFO L93 Difference]: Finished difference Result 123 states and 146 transitions. [2020-10-26 19:15:58,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:15:58,877 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-10-26 19:15:58,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:15:58,878 INFO L225 Difference]: With dead ends: 123 [2020-10-26 19:15:58,879 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:15:58,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:15:58,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:15:58,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2020-10-26 19:15:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-26 19:15:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 123 transitions. [2020-10-26 19:15:58,891 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 123 transitions. Word has length 79 [2020-10-26 19:15:58,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:15:58,891 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 123 transitions. [2020-10-26 19:15:58,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:15:58,891 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 123 transitions. [2020-10-26 19:15:58,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:15:58,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:15:58,892 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:15:58,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:15:58,892 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:15:58,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:15:58,892 INFO L82 PathProgramCache]: Analyzing trace with hash -437489100, now seen corresponding path program 27 times [2020-10-26 19:15:58,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:15:58,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196259291] [2020-10-26 19:15:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:15:58,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:15:58,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:58,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:58,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:58,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:59,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:59,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:15:59,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:00,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:03,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:03,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 19:16:03,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:16:03,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:16:03,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:03,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:16:03,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:03,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:16:03,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:04,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:04,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:04,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:04,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:04,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:04,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:04,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:04,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:04,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:04,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:04,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 19:16:04,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196259291] [2020-10-26 19:16:04,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:04,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:16:04,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594936925] [2020-10-26 19:16:04,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:16:04,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:04,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:16:04,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:16:04,331 INFO L87 Difference]: Start difference. First operand 104 states and 123 transitions. Second operand 24 states. [2020-10-26 19:16:04,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:04,880 INFO L93 Difference]: Finished difference Result 312 states and 412 transitions. [2020-10-26 19:16:04,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:16:04,881 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-10-26 19:16:04,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:04,883 INFO L225 Difference]: With dead ends: 312 [2020-10-26 19:16:04,883 INFO L226 Difference]: Without dead ends: 255 [2020-10-26 19:16:04,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:16:04,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-26 19:16:04,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 106. [2020-10-26 19:16:04,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:16:04,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2020-10-26 19:16:04,905 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 82 [2020-10-26 19:16:04,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:04,906 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2020-10-26 19:16:04,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:16:04,906 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2020-10-26 19:16:04,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-26 19:16:04,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:04,907 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:04,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:16:04,907 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:04,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:04,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1757794794, now seen corresponding path program 28 times [2020-10-26 19:16:04,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:04,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864293093] [2020-10-26 19:16:04,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:04,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:04,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:04,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:04,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:05,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:05,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:05,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:05,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:05,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:09,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:09,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 19:16:09,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:16:09,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:16:09,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:09,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:16:09,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:09,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:16:09,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:10,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:10,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:10,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:10,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:10,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:10,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:16:10,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:10,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:10,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:10,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:10,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 19:16:10,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864293093] [2020-10-26 19:16:10,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:10,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:16:10,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031976136] [2020-10-26 19:16:10,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:16:10,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:10,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:16:10,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:16:10,373 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand 25 states. [2020-10-26 19:16:11,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:11,076 INFO L93 Difference]: Finished difference Result 326 states and 431 transitions. [2020-10-26 19:16:11,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:16:11,076 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 84 [2020-10-26 19:16:11,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:11,078 INFO L225 Difference]: With dead ends: 326 [2020-10-26 19:16:11,079 INFO L226 Difference]: Without dead ends: 269 [2020-10-26 19:16:11,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:16:11,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-26 19:16:11,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 108. [2020-10-26 19:16:11,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-26 19:16:11,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 127 transitions. [2020-10-26 19:16:11,098 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 127 transitions. Word has length 84 [2020-10-26 19:16:11,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:11,098 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 127 transitions. [2020-10-26 19:16:11,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:16:11,098 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 127 transitions. [2020-10-26 19:16:11,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-26 19:16:11,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:11,099 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:11,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:16:11,099 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:11,100 INFO L82 PathProgramCache]: Analyzing trace with hash 738752888, now seen corresponding path program 29 times [2020-10-26 19:16:11,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:11,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402325344] [2020-10-26 19:16:11,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:11,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:11,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:11,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:11,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:11,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:11,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:11,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:12,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:16,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:16,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:16:16,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:16:16,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:16:16,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:16,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:16:16,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:16,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:16:16,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:16,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:16,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:16,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:16,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:16,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:16,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:16,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:16:16,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:16,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:16,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:16,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:16,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 19:16:16,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402325344] [2020-10-26 19:16:16,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:16,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:16:16,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812066049] [2020-10-26 19:16:16,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:16:16,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:16,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:16:16,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:16:16,598 INFO L87 Difference]: Start difference. First operand 108 states and 127 transitions. Second operand 26 states. [2020-10-26 19:16:17,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:17,243 INFO L93 Difference]: Finished difference Result 340 states and 450 transitions. [2020-10-26 19:16:17,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:16:17,244 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 86 [2020-10-26 19:16:17,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:17,246 INFO L225 Difference]: With dead ends: 340 [2020-10-26 19:16:17,247 INFO L226 Difference]: Without dead ends: 283 [2020-10-26 19:16:17,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:16:17,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-26 19:16:17,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 110. [2020-10-26 19:16:17,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:16:17,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 129 transitions. [2020-10-26 19:16:17,267 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 129 transitions. Word has length 86 [2020-10-26 19:16:17,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:17,267 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 129 transitions. [2020-10-26 19:16:17,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:16:17,267 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 129 transitions. [2020-10-26 19:16:17,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-26 19:16:17,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:17,268 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:17,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:16:17,268 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:17,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:17,269 INFO L82 PathProgramCache]: Analyzing trace with hash -965643174, now seen corresponding path program 30 times [2020-10-26 19:16:17,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:17,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203138393] [2020-10-26 19:16:17,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:17,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:17,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:17,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:17,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:17,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:17,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:18,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:18,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:22,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:22,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 19:16:22,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:16:22,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:16:22,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:22,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:16:22,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:22,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:16:22,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:22,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:22,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:22,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:22,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:22,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:22,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:16:22,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:22,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:22,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:22,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:22,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 19:16:22,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203138393] [2020-10-26 19:16:22,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:22,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:16:22,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112142362] [2020-10-26 19:16:22,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:16:22,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:22,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:16:22,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:16:22,812 INFO L87 Difference]: Start difference. First operand 110 states and 129 transitions. Second operand 27 states. [2020-10-26 19:16:23,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:23,482 INFO L93 Difference]: Finished difference Result 354 states and 469 transitions. [2020-10-26 19:16:23,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:16:23,482 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2020-10-26 19:16:23,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:23,485 INFO L225 Difference]: With dead ends: 354 [2020-10-26 19:16:23,485 INFO L226 Difference]: Without dead ends: 297 [2020-10-26 19:16:23,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:16:23,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-26 19:16:23,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 112. [2020-10-26 19:16:23,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-26 19:16:23,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 131 transitions. [2020-10-26 19:16:23,519 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 131 transitions. Word has length 88 [2020-10-26 19:16:23,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:23,519 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 131 transitions. [2020-10-26 19:16:23,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:16:23,520 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 131 transitions. [2020-10-26 19:16:23,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:16:23,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:23,523 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:23,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:16:23,523 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:23,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:23,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1787248316, now seen corresponding path program 31 times [2020-10-26 19:16:23,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:23,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821865361] [2020-10-26 19:16:23,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:23,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:23,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:23,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:23,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:23,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:23,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:28,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:28,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 19:16:28,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:16:28,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:16:28,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:28,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:16:28,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:28,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:16:28,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:29,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:29,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:29,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:29,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:29,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:29,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:16:29,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:29,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:29,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:29,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:29,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 19:16:29,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821865361] [2020-10-26 19:16:29,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:29,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:16:29,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516175434] [2020-10-26 19:16:29,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:16:29,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:29,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:16:29,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:16:29,091 INFO L87 Difference]: Start difference. First operand 112 states and 131 transitions. Second operand 28 states. [2020-10-26 19:16:29,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:29,770 INFO L93 Difference]: Finished difference Result 368 states and 488 transitions. [2020-10-26 19:16:29,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:16:29,771 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 90 [2020-10-26 19:16:29,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:29,773 INFO L225 Difference]: With dead ends: 368 [2020-10-26 19:16:29,773 INFO L226 Difference]: Without dead ends: 311 [2020-10-26 19:16:29,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:16:29,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-26 19:16:29,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 114. [2020-10-26 19:16:29,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:16:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 133 transitions. [2020-10-26 19:16:29,793 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 133 transitions. Word has length 90 [2020-10-26 19:16:29,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:29,794 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 133 transitions. [2020-10-26 19:16:29,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:16:29,794 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 133 transitions. [2020-10-26 19:16:29,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-26 19:16:29,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:29,795 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:29,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:16:29,795 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:29,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:29,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1616115870, now seen corresponding path program 32 times [2020-10-26 19:16:29,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:29,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286522231] [2020-10-26 19:16:29,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:29,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:29,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:29,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:29,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:30,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:30,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:30,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:34,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:34,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 19:16:34,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:16:34,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:16:34,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:34,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:16:34,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:34,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:16:34,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:35,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:35,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:35,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:35,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:35,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:35,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:35,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:35,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:35,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:35,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:35,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:35,440 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 19:16:35,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286522231] [2020-10-26 19:16:35,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:35,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:16:35,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085931704] [2020-10-26 19:16:35,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:16:35,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:35,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:16:35,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:16:35,442 INFO L87 Difference]: Start difference. First operand 114 states and 133 transitions. Second operand 29 states. [2020-10-26 19:16:36,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:36,304 INFO L93 Difference]: Finished difference Result 382 states and 507 transitions. [2020-10-26 19:16:36,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:16:36,304 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 92 [2020-10-26 19:16:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:36,306 INFO L225 Difference]: With dead ends: 382 [2020-10-26 19:16:36,306 INFO L226 Difference]: Without dead ends: 325 [2020-10-26 19:16:36,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:16:36,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-26 19:16:36,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 116. [2020-10-26 19:16:36,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-26 19:16:36,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 135 transitions. [2020-10-26 19:16:36,329 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 135 transitions. Word has length 92 [2020-10-26 19:16:36,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:36,330 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 135 transitions. [2020-10-26 19:16:36,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:16:36,330 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 135 transitions. [2020-10-26 19:16:36,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-26 19:16:36,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:36,331 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:36,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:16:36,331 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:36,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:36,331 INFO L82 PathProgramCache]: Analyzing trace with hash 366592512, now seen corresponding path program 33 times [2020-10-26 19:16:36,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:36,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102716842] [2020-10-26 19:16:36,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:36,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:36,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:36,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:36,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:37,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:37,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:37,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:41,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:41,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:16:41,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:16:41,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:16:41,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:41,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:16:41,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:41,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:16:41,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:41,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:41,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:41,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:41,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:41,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:41,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:41,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:41,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:41,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:41,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:41,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 19:16:41,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102716842] [2020-10-26 19:16:41,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:41,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:16:41,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675867087] [2020-10-26 19:16:41,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:16:41,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:41,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:16:41,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:16:41,975 INFO L87 Difference]: Start difference. First operand 116 states and 135 transitions. Second operand 30 states. [2020-10-26 19:16:42,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:42,773 INFO L93 Difference]: Finished difference Result 396 states and 526 transitions. [2020-10-26 19:16:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:16:42,774 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 94 [2020-10-26 19:16:42,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:42,776 INFO L225 Difference]: With dead ends: 396 [2020-10-26 19:16:42,776 INFO L226 Difference]: Without dead ends: 339 [2020-10-26 19:16:42,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:16:42,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-10-26 19:16:42,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 118. [2020-10-26 19:16:42,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:16:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 137 transitions. [2020-10-26 19:16:42,800 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 137 transitions. Word has length 94 [2020-10-26 19:16:42,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:42,801 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 137 transitions. [2020-10-26 19:16:42,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:16:42,801 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 137 transitions. [2020-10-26 19:16:42,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-26 19:16:42,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:42,802 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:42,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:16:42,802 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:42,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:42,803 INFO L82 PathProgramCache]: Analyzing trace with hash -2129478942, now seen corresponding path program 34 times [2020-10-26 19:16:42,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:42,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784746002] [2020-10-26 19:16:42,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:42,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:42,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:42,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:42,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:43,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:46,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:47,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:47,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:47,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 19:16:47,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:16:47,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:16:47,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:47,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:16:47,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:47,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:16:47,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:48,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:48,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:48,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:48,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:48,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:48,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:16:48,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:48,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:48,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:48,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:48,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 19:16:48,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784746002] [2020-10-26 19:16:48,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:48,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:16:48,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613864795] [2020-10-26 19:16:48,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:16:48,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:48,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:16:48,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:16:48,503 INFO L87 Difference]: Start difference. First operand 118 states and 137 transitions. Second operand 31 states. [2020-10-26 19:16:49,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:49,421 INFO L93 Difference]: Finished difference Result 410 states and 545 transitions. [2020-10-26 19:16:49,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:16:49,422 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 96 [2020-10-26 19:16:49,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:49,424 INFO L225 Difference]: With dead ends: 410 [2020-10-26 19:16:49,424 INFO L226 Difference]: Without dead ends: 353 [2020-10-26 19:16:49,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:16:49,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-26 19:16:49,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 120. [2020-10-26 19:16:49,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-26 19:16:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2020-10-26 19:16:49,458 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 96 [2020-10-26 19:16:49,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:49,459 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2020-10-26 19:16:49,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:16:49,459 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2020-10-26 19:16:49,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-26 19:16:49,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:49,460 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:49,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:16:49,461 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:49,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:49,461 INFO L82 PathProgramCache]: Analyzing trace with hash 32572228, now seen corresponding path program 35 times [2020-10-26 19:16:49,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:49,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102328953] [2020-10-26 19:16:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:49,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:49,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:49,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:51,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:51,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:51,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:52,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:54,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:54,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 19:16:54,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:16:54,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:16:54,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:54,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:16:54,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:16:54,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:16:54,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:55,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:16:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:55,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:55,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:16:55,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:16:55,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:16:55,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:16:55,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:16:55,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:16:55,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:16:55,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:16:55,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:16:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 19:16:55,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102328953] [2020-10-26 19:16:55,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:16:55,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:16:55,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222931199] [2020-10-26 19:16:55,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:16:55,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:16:55,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:16:55,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:16:55,229 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand 32 states. [2020-10-26 19:16:56,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:16:56,397 INFO L93 Difference]: Finished difference Result 424 states and 564 transitions. [2020-10-26 19:16:56,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:16:56,398 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 98 [2020-10-26 19:16:56,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:16:56,399 INFO L225 Difference]: With dead ends: 424 [2020-10-26 19:16:56,400 INFO L226 Difference]: Without dead ends: 367 [2020-10-26 19:16:56,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:16:56,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-26 19:16:56,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 122. [2020-10-26 19:16:56,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:16:56,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2020-10-26 19:16:56,427 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 98 [2020-10-26 19:16:56,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:16:56,428 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2020-10-26 19:16:56,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:16:56,428 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2020-10-26 19:16:56,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-26 19:16:56,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:16:56,429 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:16:56,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:16:56,429 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:16:56,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:16:56,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1000424666, now seen corresponding path program 36 times [2020-10-26 19:16:56,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:16:56,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3975337] [2020-10-26 19:16:56,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:16:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:16:56,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:56,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:56,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:57,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:57,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:57,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:57,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:16:57,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:01,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:01,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:01,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:01,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:01,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 19:17:01,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-26 19:17:01,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:17:01,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:01,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:17:01,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:01,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:17:01,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:02,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:02,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:02,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:02,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:02,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:02,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:02,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:02,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:02,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:02,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:02,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 19:17:02,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3975337] [2020-10-26 19:17:02,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:02,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:17:02,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474932172] [2020-10-26 19:17:02,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:17:02,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:02,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:17:02,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:17:02,213 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand 33 states. [2020-10-26 19:17:03,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:03,211 INFO L93 Difference]: Finished difference Result 438 states and 583 transitions. [2020-10-26 19:17:03,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:17:03,212 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 100 [2020-10-26 19:17:03,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:03,215 INFO L225 Difference]: With dead ends: 438 [2020-10-26 19:17:03,215 INFO L226 Difference]: Without dead ends: 381 [2020-10-26 19:17:03,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:17:03,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-10-26 19:17:03,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 124. [2020-10-26 19:17:03,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-26 19:17:03,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2020-10-26 19:17:03,244 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 100 [2020-10-26 19:17:03,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:03,244 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2020-10-26 19:17:03,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:17:03,245 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2020-10-26 19:17:03,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-26 19:17:03,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:03,245 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:03,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:17:03,246 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:03,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:03,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1572994424, now seen corresponding path program 37 times [2020-10-26 19:17:03,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:03,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962673177] [2020-10-26 19:17:03,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:03,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:03,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:04,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:04,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:04,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:04,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:06,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:06,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:07,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:07,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:08,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:08,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 19:17:08,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:17:08,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:17:08,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:08,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:17:08,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:08,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:17:08,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:09,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:09,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:09,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:09,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:09,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:09,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:17:09,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:09,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:09,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:09,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:09,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 19:17:09,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962673177] [2020-10-26 19:17:09,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:09,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:17:09,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540116314] [2020-10-26 19:17:09,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:17:09,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:09,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:17:09,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:17:09,102 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand 34 states. [2020-10-26 19:17:10,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:10,350 INFO L93 Difference]: Finished difference Result 452 states and 602 transitions. [2020-10-26 19:17:10,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:17:10,351 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 102 [2020-10-26 19:17:10,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:10,353 INFO L225 Difference]: With dead ends: 452 [2020-10-26 19:17:10,353 INFO L226 Difference]: Without dead ends: 395 [2020-10-26 19:17:10,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:17:10,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-10-26 19:17:10,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 126. [2020-10-26 19:17:10,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-26 19:17:10,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 145 transitions. [2020-10-26 19:17:10,380 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 145 transitions. Word has length 102 [2020-10-26 19:17:10,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:10,381 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 145 transitions. [2020-10-26 19:17:10,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:17:10,381 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 145 transitions. [2020-10-26 19:17:10,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-26 19:17:10,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:10,382 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:10,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:17:10,382 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:10,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:10,382 INFO L82 PathProgramCache]: Analyzing trace with hash -2056717974, now seen corresponding path program 38 times [2020-10-26 19:17:10,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:10,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072586244] [2020-10-26 19:17:10,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:10,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:10,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:11,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:11,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:11,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:11,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:13,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:14,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:14,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:14,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:15,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:15,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 19:17:15,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:17:15,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:17:15,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:15,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:17:15,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:15,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:17:15,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:16,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:16,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:16,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:16,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:16,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:16,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:17:16,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:16,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:16,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:16,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:16,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 19:17:16,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072586244] [2020-10-26 19:17:16,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:16,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:17:16,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624796121] [2020-10-26 19:17:16,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:17:16,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:16,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:17:16,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:17:16,204 INFO L87 Difference]: Start difference. First operand 126 states and 145 transitions. Second operand 35 states. [2020-10-26 19:17:17,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:17,328 INFO L93 Difference]: Finished difference Result 466 states and 621 transitions. [2020-10-26 19:17:17,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:17:17,328 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 104 [2020-10-26 19:17:17,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:17,330 INFO L225 Difference]: With dead ends: 466 [2020-10-26 19:17:17,330 INFO L226 Difference]: Without dead ends: 409 [2020-10-26 19:17:17,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:17:17,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-10-26 19:17:17,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 128. [2020-10-26 19:17:17,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-26 19:17:17,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 147 transitions. [2020-10-26 19:17:17,361 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 147 transitions. Word has length 104 [2020-10-26 19:17:17,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:17,361 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 147 transitions. [2020-10-26 19:17:17,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:17:17,362 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 147 transitions. [2020-10-26 19:17:17,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-26 19:17:17,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:17,362 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:17,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:17:17,363 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:17,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:17,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1236385740, now seen corresponding path program 39 times [2020-10-26 19:17:17,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:17,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647279230] [2020-10-26 19:17:17,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:17,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:17,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:17,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:17,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:17,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:17,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:18,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:22,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:22,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 19:17:22,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:17:22,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:17:22,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:17:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:17:22,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:23,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:23,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:23,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:23,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:23,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:23,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 19:17:23,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:23,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:23,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:23,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:23,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1116 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 19:17:23,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647279230] [2020-10-26 19:17:23,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:23,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:17:23,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460897951] [2020-10-26 19:17:23,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:17:23,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:23,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:17:23,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:17:23,251 INFO L87 Difference]: Start difference. First operand 128 states and 147 transitions. Second operand 36 states. [2020-10-26 19:17:24,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:24,582 INFO L93 Difference]: Finished difference Result 480 states and 640 transitions. [2020-10-26 19:17:24,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:17:24,582 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 106 [2020-10-26 19:17:24,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:24,585 INFO L225 Difference]: With dead ends: 480 [2020-10-26 19:17:24,585 INFO L226 Difference]: Without dead ends: 423 [2020-10-26 19:17:24,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:17:24,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-26 19:17:24,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 130. [2020-10-26 19:17:24,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-26 19:17:24,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2020-10-26 19:17:24,627 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 106 [2020-10-26 19:17:24,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:24,627 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2020-10-26 19:17:24,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:17:24,627 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2020-10-26 19:17:24,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-26 19:17:24,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:24,628 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:24,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:17:24,628 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:24,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:24,629 INFO L82 PathProgramCache]: Analyzing trace with hash 518157742, now seen corresponding path program 40 times [2020-10-26 19:17:24,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:24,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338988902] [2020-10-26 19:17:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:24,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:24,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:24,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:25,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:25,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:26,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:26,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:29,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:29,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-26 19:17:29,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:17:29,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:17:29,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:29,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:17:29,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:29,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:17:29,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:30,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:30,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:30,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:30,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:30,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:30,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:17:30,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:30,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:30,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:30,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:30,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:30,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 19:17:30,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338988902] [2020-10-26 19:17:30,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:30,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:17:30,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435967054] [2020-10-26 19:17:30,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:17:30,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:30,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:17:30,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:17:30,615 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand 37 states. [2020-10-26 19:17:32,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:32,173 INFO L93 Difference]: Finished difference Result 494 states and 659 transitions. [2020-10-26 19:17:32,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:17:32,173 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 108 [2020-10-26 19:17:32,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:32,176 INFO L225 Difference]: With dead ends: 494 [2020-10-26 19:17:32,176 INFO L226 Difference]: Without dead ends: 437 [2020-10-26 19:17:32,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:17:32,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-26 19:17:32,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 132. [2020-10-26 19:17:32,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-26 19:17:32,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 151 transitions. [2020-10-26 19:17:32,221 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 151 transitions. Word has length 108 [2020-10-26 19:17:32,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:32,222 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 151 transitions. [2020-10-26 19:17:32,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:17:32,222 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 151 transitions. [2020-10-26 19:17:32,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-26 19:17:32,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:32,223 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:32,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:17:32,223 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:32,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:32,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1790786320, now seen corresponding path program 41 times [2020-10-26 19:17:32,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:32,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156670014] [2020-10-26 19:17:32,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:32,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:32,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:32,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:32,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:33,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:34,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking...