/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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-crafted/zero_sum_const5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 03:26:43,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 03:26:43,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 03:26:43,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 03:26:43,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 03:26:43,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 03:26:43,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 03:26:43,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 03:26:43,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 03:26:43,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 03:26:43,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 03:26:43,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 03:26:43,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 03:26:43,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 03:26:43,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 03:26:43,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 03:26:43,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 03:26:43,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 03:26:43,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 03:26:43,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 03:26:43,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 03:26:43,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 03:26:43,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 03:26:43,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 03:26:43,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 03:26:43,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 03:26:43,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 03:26:43,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 03:26:43,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 03:26:43,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 03:26:43,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 03:26:43,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 03:26:43,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 03:26:43,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 03:26:43,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 03:26:43,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 03:26:43,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 03:26:43,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 03:26:43,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 03:26:43,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 03:26:43,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 03:26:43,308 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 [2020-10-29 03:26:43,351 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 03:26:43,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 03:26:43,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 03:26:43,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 03:26:43,354 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 03:26:43,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 03:26:43,354 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 03:26:43,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 03:26:43,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 03:26:43,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 03:26:43,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 03:26:43,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 03:26:43,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 03:26:43,356 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 03:26:43,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 03:26:43,356 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 03:26:43,356 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 03:26:43,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 03:26:43,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 03:26:43,357 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 03:26:43,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 03:26:43,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:26:43,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 03:26:43,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 03:26:43,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 03:26:43,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 03:26:43,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 03:26:43,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 03:26:43,359 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 03:26:43,359 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 03:26:43,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 03:26:43,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 03:26:43,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 03:26:43,837 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 03:26:43,838 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 03:26:43,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2020-10-29 03:26:43,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bcdf38c55/cf69216192c44df4aa46373f6272d276/FLAG396d3addc [2020-10-29 03:26:44,584 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 03:26:44,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const5.c [2020-10-29 03:26:44,598 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bcdf38c55/cf69216192c44df4aa46373f6272d276/FLAG396d3addc [2020-10-29 03:26:44,949 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bcdf38c55/cf69216192c44df4aa46373f6272d276 [2020-10-29 03:26:44,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 03:26:44,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 03:26:44,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 03:26:44,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 03:26:44,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 03:26:44,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:26:44" (1/1) ... [2020-10-29 03:26:44,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bdeba37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:26:44, skipping insertion in model container [2020-10-29 03:26:44,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:26:44" (1/1) ... [2020-10-29 03:26:44,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 03:26:45,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 03:26:45,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:26:45,303 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 03:26:45,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:26:45,360 INFO L208 MainTranslator]: Completed translation [2020-10-29 03:26:45,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:26:45 WrapperNode [2020-10-29 03:26:45,363 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 03:26:45,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 03:26:45,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 03:26:45,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 03:26:45,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:26:45" (1/1) ... [2020-10-29 03:26:45,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:26:45" (1/1) ... [2020-10-29 03:26:45,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:26:45" (1/1) ... [2020-10-29 03:26:45,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:26:45" (1/1) ... [2020-10-29 03:26:45,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:26:45" (1/1) ... [2020-10-29 03:26:45,496 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:26:45" (1/1) ... [2020-10-29 03:26:45,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:26:45" (1/1) ... [2020-10-29 03:26:45,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 03:26:45,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 03:26:45,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 03:26:45,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 03:26:45,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:26:45" (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 [2020-10-29 03:26:45,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 03:26:45,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 03:26:45,620 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 03:26:45,621 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 03:26:45,621 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 03:26:45,621 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 03:26:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 03:26:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 03:26:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 03:26:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 03:26:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 03:26:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 03:26:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-29 03:26:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-29 03:26:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 03:26:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-29 03:26:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 03:26:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 03:26:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 03:26:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 03:26:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 03:26:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 03:26:46,365 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 03:26:46,366 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-29 03:26:46,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:26:46 BoogieIcfgContainer [2020-10-29 03:26:46,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 03:26:46,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 03:26:46,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 03:26:46,377 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 03:26:46,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 03:26:44" (1/3) ... [2020-10-29 03:26:46,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72169a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:26:46, skipping insertion in model container [2020-10-29 03:26:46,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:26:45" (2/3) ... [2020-10-29 03:26:46,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72169a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:26:46, skipping insertion in model container [2020-10-29 03:26:46,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:26:46" (3/3) ... [2020-10-29 03:26:46,382 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const5.c [2020-10-29 03:26:46,398 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 03:26:46,404 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 03:26:46,421 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 03:26:46,454 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 03:26:46,455 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 03:26:46,455 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 03:26:46,455 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 03:26:46,455 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 03:26:46,455 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 03:26:46,456 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 03:26:46,456 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 03:26:46,477 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-10-29 03:26:46,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 03:26:46,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:26:46,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:26:46,488 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:26:46,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:26:46,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1455593951, now seen corresponding path program 1 times [2020-10-29 03:26:46,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:26:46,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025649119] [2020-10-29 03:26:46,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:26:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:46,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:46,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:46,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:46,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:47,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:47,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:47,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:47,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:47,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:47,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:47,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:49,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:51,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:51,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 03:26:51,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 03:26:51,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:26:51,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:51,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:51,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 03:26:51,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:26:51,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 03:26:51,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 03:26:51,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:26:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:51,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:51,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:51,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:26:51,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:26:51,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 03:26:51,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:51,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:51,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:26:51,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:26:51,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:26:51,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:26:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:26:51,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025649119] [2020-10-29 03:26:51,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:26:51,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 03:26:51,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878478787] [2020-10-29 03:26:51,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 03:26:51,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:26:51,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 03:26:51,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:26:51,894 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 5 states. [2020-10-29 03:26:52,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:26:52,295 INFO L93 Difference]: Finished difference Result 125 states and 191 transitions. [2020-10-29 03:26:52,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 03:26:52,298 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-10-29 03:26:52,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:26:52,308 INFO L225 Difference]: With dead ends: 125 [2020-10-29 03:26:52,308 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 03:26:52,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 03:26:52,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 03:26:52,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-29 03:26:52,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-29 03:26:52,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-10-29 03:26:52,369 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 33 [2020-10-29 03:26:52,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:26:52,370 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-10-29 03:26:52,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 03:26:52,370 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-10-29 03:26:52,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 03:26:52,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:26:52,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:26:52,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 03:26:52,373 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:26:52,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:26:52,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1858982343, now seen corresponding path program 1 times [2020-10-29 03:26:52,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:26:52,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138570823] [2020-10-29 03:26:52,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:26:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:52,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:52,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:52,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:52,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:52,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:52,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:52,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:53,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:57,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:57,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 03:26:57,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:26:57,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 03:26:57,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:57,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:57,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:26:57,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:26:57,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 03:26:57,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-29 03:26:57,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:26:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:57,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:57,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:57,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:26:57,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:26:57,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 03:26:57,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:57,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:57,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:26:57,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:26:57,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:26:57,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:26:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-29 03:26:57,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138570823] [2020-10-29 03:26:57,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:26:57,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 03:26:57,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336870805] [2020-10-29 03:26:57,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 03:26:57,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:26:57,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 03:26:57,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 03:26:57,591 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 6 states. [2020-10-29 03:26:58,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:26:58,034 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2020-10-29 03:26:58,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 03:26:58,036 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-29 03:26:58,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:26:58,038 INFO L225 Difference]: With dead ends: 124 [2020-10-29 03:26:58,038 INFO L226 Difference]: Without dead ends: 78 [2020-10-29 03:26:58,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-29 03:26:58,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-29 03:26:58,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-29 03:26:58,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-29 03:26:58,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2020-10-29 03:26:58,076 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 55 [2020-10-29 03:26:58,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:26:58,078 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2020-10-29 03:26:58,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 03:26:58,079 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2020-10-29 03:26:58,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 03:26:58,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:26:58,086 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:26:58,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 03:26:58,089 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:26:58,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:26:58,092 INFO L82 PathProgramCache]: Analyzing trace with hash 597490525, now seen corresponding path program 2 times [2020-10-29 03:26:58,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:26:58,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641176210] [2020-10-29 03:26:58,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:26:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:58,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:59,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:00,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:03,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:04,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:27:04,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 03:27:04,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:27:04,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5808 [2020-10-29 03:27:04,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:27:04,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:27:04,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-29 03:27:04,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:27:04,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 03:27:04,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:27:04,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:27:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:27:04,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:04,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:27:04,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:27:04,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:27:04,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:27:04,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:27:04,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:27:04,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:27:04,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:27:04,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:27:04,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:27:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 03:27:05,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641176210] [2020-10-29 03:27:05,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:27:05,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 03:27:05,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347622103] [2020-10-29 03:27:05,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 03:27:05,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:27:05,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 03:27:05,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:27:05,038 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 17 states. [2020-10-29 03:27:06,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:27:06,093 INFO L93 Difference]: Finished difference Result 140 states and 159 transitions. [2020-10-29 03:27:06,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:27:06,094 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2020-10-29 03:27:06,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:27:06,096 INFO L225 Difference]: With dead ends: 140 [2020-10-29 03:27:06,097 INFO L226 Difference]: Without dead ends: 134 [2020-10-29 03:27:06,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 13 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:27:06,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-29 03:27:06,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2020-10-29 03:27:06,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-29 03:27:06,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 150 transitions. [2020-10-29 03:27:06,117 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 150 transitions. Word has length 77 [2020-10-29 03:27:06,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:27:06,118 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 150 transitions. [2020-10-29 03:27:06,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 03:27:06,118 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 150 transitions. [2020-10-29 03:27:06,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 03:27:06,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:27:06,120 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:27:06,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 03:27:06,120 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:27:06,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:27:06,121 INFO L82 PathProgramCache]: Analyzing trace with hash 578659423, now seen corresponding path program 3 times [2020-10-29 03:27:06,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:27:06,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9526448] [2020-10-29 03:27:06,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:27:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:27:06,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:06,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:06,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:06,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:06,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:06,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:07,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:11,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:27:11,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 03:27:11,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:27:11,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:27:11,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:27:11,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:27:11,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:27:11,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:27:11,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 03:27:11,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:27:11,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:27:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:27:11,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:11,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:27:11,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:27:11,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:27:11,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:27:11,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:27:11,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:27:11,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:27:11,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:27:11,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:27:11,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:27:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-29 03:27:11,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9526448] [2020-10-29 03:27:11,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:27:11,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:27:11,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447199884] [2020-10-29 03:27:11,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:27:11,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:27:11,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:27:11,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:27:11,329 INFO L87 Difference]: Start difference. First operand 131 states and 150 transitions. Second operand 10 states. [2020-10-29 03:27:12,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:27:12,095 INFO L93 Difference]: Finished difference Result 287 states and 333 transitions. [2020-10-29 03:27:12,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 03:27:12,095 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-10-29 03:27:12,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:27:12,097 INFO L225 Difference]: With dead ends: 287 [2020-10-29 03:27:12,097 INFO L226 Difference]: Without dead ends: 165 [2020-10-29 03:27:12,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:27:12,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-29 03:27:12,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 146. [2020-10-29 03:27:12,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-29 03:27:12,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 164 transitions. [2020-10-29 03:27:12,136 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 164 transitions. Word has length 79 [2020-10-29 03:27:12,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:27:12,137 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 164 transitions. [2020-10-29 03:27:12,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:27:12,140 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 164 transitions. [2020-10-29 03:27:12,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 03:27:12,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:27:12,143 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:27:12,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 03:27:12,143 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:27:12,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:27:12,144 INFO L82 PathProgramCache]: Analyzing trace with hash 522869665, now seen corresponding path program 4 times [2020-10-29 03:27:12,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:27:12,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726978999] [2020-10-29 03:27:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:27:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:27:12,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:12,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:12,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:12,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:12,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:12,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:14,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:17,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:27:17,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 03:27:17,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:27:17,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:27:17,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:27:17,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:27:17,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:27:17,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 03:27:17,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 03:27:17,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:27:17,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:27:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:27:17,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:17,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:27:17,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:27:17,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:27:17,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:27:17,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:27:17,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:27:17,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:27:17,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:27:17,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:27:17,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:27:17,330 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-29 03:27:17,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726978999] [2020-10-29 03:27:17,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:27:17,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:27:17,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154163004] [2020-10-29 03:27:17,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:27:17,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:27:17,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:27:17,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:27:17,334 INFO L87 Difference]: Start difference. First operand 146 states and 164 transitions. Second operand 10 states. [2020-10-29 03:27:18,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:27:18,108 INFO L93 Difference]: Finished difference Result 154 states and 172 transitions. [2020-10-29 03:27:18,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 03:27:18,109 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-10-29 03:27:18,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:27:18,111 INFO L225 Difference]: With dead ends: 154 [2020-10-29 03:27:18,111 INFO L226 Difference]: Without dead ends: 100 [2020-10-29 03:27:18,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:27:18,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-29 03:27:18,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-29 03:27:18,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-29 03:27:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2020-10-29 03:27:18,125 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 81 [2020-10-29 03:27:18,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:27:18,126 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2020-10-29 03:27:18,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:27:18,126 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2020-10-29 03:27:18,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-29 03:27:18,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:27:18,130 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:27:18,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 03:27:18,130 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:27:18,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:27:18,131 INFO L82 PathProgramCache]: Analyzing trace with hash 486600819, now seen corresponding path program 5 times [2020-10-29 03:27:18,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:27:18,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688332984] [2020-10-29 03:27:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:27:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:27:18,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:20,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:22,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:24,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:27:24,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-29 03:27:24,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 03:27:24,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6074 [2020-10-29 03:27:24,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:27:24,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:27:24,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-29 03:27:24,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:27:24,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-29 03:27:24,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:27:26,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:27:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:27:26,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:26,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:27:26,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:27:26,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:27:26,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:27:26,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:27:26,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:27:26,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:27:26,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:27:26,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:27:26,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:27:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 03:27:26,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688332984] [2020-10-29 03:27:26,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:27:26,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 03:27:26,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545051658] [2020-10-29 03:27:26,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 03:27:26,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:27:26,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 03:27:26,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:27:26,206 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand 25 states. [2020-10-29 03:27:28,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:27:28,513 INFO L93 Difference]: Finished difference Result 180 states and 199 transitions. [2020-10-29 03:27:28,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 03:27:28,514 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 99 [2020-10-29 03:27:28,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:27:28,518 INFO L225 Difference]: With dead ends: 180 [2020-10-29 03:27:28,518 INFO L226 Difference]: Without dead ends: 174 [2020-10-29 03:27:28,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 20 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2020-10-29 03:27:28,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-29 03:27:28,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 169. [2020-10-29 03:27:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-29 03:27:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 188 transitions. [2020-10-29 03:27:28,561 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 188 transitions. Word has length 99 [2020-10-29 03:27:28,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:27:28,561 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 188 transitions. [2020-10-29 03:27:28,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 03:27:28,561 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 188 transitions. [2020-10-29 03:27:28,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-29 03:27:28,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:27:28,568 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:27:28,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 03:27:28,568 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:27:28,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:27:28,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1595511819, now seen corresponding path program 6 times [2020-10-29 03:27:28,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:27:28,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482148330] [2020-10-29 03:27:28,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:27:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:27:28,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:28,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:28,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:28,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:28,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:29,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:31,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:33,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:27:33,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-29 03:27:33,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:27:33,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 03:27:33,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:27:33,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:27:33,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:27:33,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:27:33,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 03:27:33,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:27:33,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:27:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:27:33,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:33,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:27:33,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:27:33,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:27:33,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:27:33,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:27:33,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:27:33,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:27:33,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:27:33,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:27:33,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:27:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-29 03:27:33,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482148330] [2020-10-29 03:27:33,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:27:33,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:27:33,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086366002] [2020-10-29 03:27:33,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:27:33,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:27:33,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:27:33,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:27:33,853 INFO L87 Difference]: Start difference. First operand 169 states and 188 transitions. Second operand 12 states. [2020-10-29 03:27:35,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:27:35,028 INFO L93 Difference]: Finished difference Result 363 states and 409 transitions. [2020-10-29 03:27:35,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:27:35,029 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 101 [2020-10-29 03:27:35,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:27:35,031 INFO L225 Difference]: With dead ends: 363 [2020-10-29 03:27:35,032 INFO L226 Difference]: Without dead ends: 203 [2020-10-29 03:27:35,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:27:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-29 03:27:35,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 184. [2020-10-29 03:27:35,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-29 03:27:35,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 202 transitions. [2020-10-29 03:27:35,064 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 202 transitions. Word has length 101 [2020-10-29 03:27:35,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:27:35,065 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 202 transitions. [2020-10-29 03:27:35,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:27:35,065 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 202 transitions. [2020-10-29 03:27:35,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-29 03:27:35,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:27:35,067 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:27:35,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 03:27:35,068 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:27:35,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:27:35,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1660163511, now seen corresponding path program 7 times [2020-10-29 03:27:35,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:27:35,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045603903] [2020-10-29 03:27:35,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:27:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:27:35,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:35,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:35,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:35,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:35,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:35,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:40,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:27:40,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-29 03:27:40,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:27:40,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 03:27:40,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:27:40,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:27:40,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:27:40,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 03:27:40,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 03:27:40,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:27:40,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:27:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:27:40,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:40,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:27:40,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:27:40,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:27:40,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:27:40,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:27:40,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:27:40,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:27:40,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:27:40,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:27:40,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:27:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-10-29 03:27:40,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045603903] [2020-10-29 03:27:40,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:27:40,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:27:40,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362450132] [2020-10-29 03:27:40,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:27:40,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:27:40,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:27:40,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:27:40,308 INFO L87 Difference]: Start difference. First operand 184 states and 202 transitions. Second operand 12 states. [2020-10-29 03:27:41,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:27:41,221 INFO L93 Difference]: Finished difference Result 192 states and 210 transitions. [2020-10-29 03:27:41,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:27:41,222 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 103 [2020-10-29 03:27:41,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:27:41,223 INFO L225 Difference]: With dead ends: 192 [2020-10-29 03:27:41,223 INFO L226 Difference]: Without dead ends: 122 [2020-10-29 03:27:41,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:27:41,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-29 03:27:41,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-10-29 03:27:41,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-29 03:27:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2020-10-29 03:27:41,240 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 103 [2020-10-29 03:27:41,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:27:41,240 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2020-10-29 03:27:41,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:27:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2020-10-29 03:27:41,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-29 03:27:41,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:27:41,247 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:27:41,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 03:27:41,247 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:27:41,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:27:41,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1822158583, now seen corresponding path program 8 times [2020-10-29 03:27:41,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:27:41,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074457410] [2020-10-29 03:27:41,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:27:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:27:41,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:43,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:27:46,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:27:46,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-29 03:27:46,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 03:27:46,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 03:27:46,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:27:46,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:27:46,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 88 [2020-10-29 03:27:46,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:27:46,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-29 03:27:46,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:28:00,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:28:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:28:00,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:28:00,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:28:00,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:28:00,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:28:00,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:28:00,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:28:00,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:28:00,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:28:00,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:28:00,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:28:00,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:28:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-29 03:28:00,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074457410] [2020-10-29 03:28:00,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:28:00,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-29 03:28:00,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440121479] [2020-10-29 03:28:00,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-29 03:28:00,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:28:00,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-29 03:28:00,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4501, Unknown=0, NotChecked=0, Total=4692 [2020-10-29 03:28:00,335 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand 69 states. [2020-10-29 03:28:01,583 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-29 03:28:03,226 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2020-10-29 03:28:05,265 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-10-29 03:28:06,988 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2020-10-29 03:28:08,776 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2020-10-29 03:28:10,210 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-10-29 03:28:10,757 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2020-10-29 03:28:11,264 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 64 [2020-10-29 03:28:11,894 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 48 [2020-10-29 03:28:12,255 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-29 03:28:12,776 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 61 [2020-10-29 03:28:13,383 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-29 03:28:14,267 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-29 03:28:14,767 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-10-29 03:28:15,339 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-10-29 03:28:15,689 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-29 03:28:16,312 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-10-29 03:28:16,799 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-29 03:28:17,408 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-29 03:28:18,113 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-10-29 03:28:18,688 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2020-10-29 03:28:19,211 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-10-29 03:28:19,700 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-10-29 03:28:20,111 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-10-29 03:28:20,745 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2020-10-29 03:28:21,285 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2020-10-29 03:28:21,797 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-29 03:28:22,368 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-29 03:28:23,197 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-29 03:28:24,027 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-29 03:28:24,620 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2020-10-29 03:28:32,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:28:32,374 INFO L93 Difference]: Finished difference Result 270 states and 295 transitions. [2020-10-29 03:28:32,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-10-29 03:28:32,375 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 121 [2020-10-29 03:28:32,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:28:32,378 INFO L225 Difference]: With dead ends: 270 [2020-10-29 03:28:32,379 INFO L226 Difference]: Without dead ends: 264 [2020-10-29 03:28:32,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 3 SyntacticMatches, 21 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3109 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=800, Invalid=15712, Unknown=0, NotChecked=0, Total=16512 [2020-10-29 03:28:32,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-29 03:28:32,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 207. [2020-10-29 03:28:32,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-29 03:28:32,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 226 transitions. [2020-10-29 03:28:32,408 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 226 transitions. Word has length 121 [2020-10-29 03:28:32,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:28:32,408 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 226 transitions. [2020-10-29 03:28:32,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-29 03:28:32,409 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 226 transitions. [2020-10-29 03:28:32,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-29 03:28:32,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:28:32,410 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:28:32,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 03:28:32,411 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:28:32,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:28:32,411 INFO L82 PathProgramCache]: Analyzing trace with hash 453082891, now seen corresponding path program 9 times [2020-10-29 03:28:32,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:28:32,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528657526] [2020-10-29 03:28:32,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:28:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:28:32,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:28:32,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:28:32,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:28:32,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:28:32,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:28:32,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:28:37,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:28:37,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-29 03:28:37,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:28:37,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 03:28:37,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:28:37,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:28:37,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:28:37,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:28:37,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 03:28:37,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:28:37,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:28:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:28:37,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:28:37,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:28:37,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:28:37,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:28:37,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:28:37,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:28:37,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:28:37,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:28:37,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:28:37,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:28:37,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:28:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-29 03:28:37,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528657526] [2020-10-29 03:28:37,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:28:37,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:28:37,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838454760] [2020-10-29 03:28:37,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:28:37,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:28:37,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:28:37,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:28:37,773 INFO L87 Difference]: Start difference. First operand 207 states and 226 transitions. Second operand 14 states. [2020-10-29 03:28:39,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:28:39,573 INFO L93 Difference]: Finished difference Result 484 states and 535 transitions. [2020-10-29 03:28:39,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:28:39,575 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 123 [2020-10-29 03:28:39,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:28:39,576 INFO L225 Difference]: With dead ends: 484 [2020-10-29 03:28:39,577 INFO L226 Difference]: Without dead ends: 241 [2020-10-29 03:28:39,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:28:39,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-29 03:28:39,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 222. [2020-10-29 03:28:39,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-29 03:28:39,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 240 transitions. [2020-10-29 03:28:39,598 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 240 transitions. Word has length 123 [2020-10-29 03:28:39,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:28:39,599 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 240 transitions. [2020-10-29 03:28:39,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:28:39,599 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 240 transitions. [2020-10-29 03:28:39,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-29 03:28:39,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:28:39,601 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:28:39,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 03:28:39,601 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:28:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:28:39,602 INFO L82 PathProgramCache]: Analyzing trace with hash 163789645, now seen corresponding path program 10 times [2020-10-29 03:28:39,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:28:39,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24460780] [2020-10-29 03:28:39,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:28:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:28:39,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:28:39,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:28:39,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:28:39,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:28:39,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:28:39,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:28:44,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:28:44,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-29 03:28:44,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:28:44,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-29 03:28:44,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:28:44,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:28:44,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:28:44,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 03:28:44,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 03:28:44,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:28:44,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:28:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:28:44,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:28:44,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:28:44,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:28:44,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:28:44,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:28:44,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:28:44,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:28:44,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:28:44,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:28:44,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:28:44,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:28:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-29 03:28:44,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24460780] [2020-10-29 03:28:44,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:28:44,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:28:44,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971241577] [2020-10-29 03:28:44,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:28:44,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:28:44,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:28:44,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:28:44,881 INFO L87 Difference]: Start difference. First operand 222 states and 240 transitions. Second operand 14 states. [2020-10-29 03:28:46,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:28:46,516 INFO L93 Difference]: Finished difference Result 230 states and 248 transitions. [2020-10-29 03:28:46,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 03:28:46,518 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 125 [2020-10-29 03:28:46,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:28:46,520 INFO L225 Difference]: With dead ends: 230 [2020-10-29 03:28:46,520 INFO L226 Difference]: Without dead ends: 144 [2020-10-29 03:28:46,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:28:46,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-29 03:28:46,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-29 03:28:46,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-29 03:28:46,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2020-10-29 03:28:46,534 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 125 [2020-10-29 03:28:46,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:28:46,535 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2020-10-29 03:28:46,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:28:46,535 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2020-10-29 03:28:46,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-29 03:28:46,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:28:46,537 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:28:46,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 03:28:46,537 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:28:46,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:28:46,538 INFO L82 PathProgramCache]: Analyzing trace with hash 858307871, now seen corresponding path program 11 times [2020-10-29 03:28:46,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:28:46,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508373799] [2020-10-29 03:28:46,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:28:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:28:46,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:28:51,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:28:51,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-29 03:28:51,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:28:51,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-29 03:28:51,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:28:51,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:28:51,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 111 [2020-10-29 03:28:51,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:28:51,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-29 03:28:51,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:29:07,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:29:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:29:07,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:29:07,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:29:07,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:29:07,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:29:07,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:29:07,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:29:07,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:29:07,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:29:07,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:29:07,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:29:07,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:29:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:29:08,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508373799] [2020-10-29 03:29:08,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:29:08,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-10-29 03:29:08,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190007895] [2020-10-29 03:29:08,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-29 03:29:08,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:29:08,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-29 03:29:08,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=7247, Unknown=0, NotChecked=0, Total=7656 [2020-10-29 03:29:08,065 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand 88 states. [2020-10-29 03:29:13,734 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-29 03:29:17,651 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-29 03:29:34,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:29:34,706 INFO L93 Difference]: Finished difference Result 477 states and 517 transitions. [2020-10-29 03:29:34,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-10-29 03:29:34,709 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 143 [2020-10-29 03:29:34,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:29:34,714 INFO L225 Difference]: With dead ends: 477 [2020-10-29 03:29:34,714 INFO L226 Difference]: Without dead ends: 469 [2020-10-29 03:29:34,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 6 SyntacticMatches, 22 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4203 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=712, Invalid=12860, Unknown=0, NotChecked=0, Total=13572 [2020-10-29 03:29:34,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-10-29 03:29:34,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 355. [2020-10-29 03:29:34,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-29 03:29:34,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 384 transitions. [2020-10-29 03:29:34,761 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 384 transitions. Word has length 143 [2020-10-29 03:29:34,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:29:34,762 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 384 transitions. [2020-10-29 03:29:34,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-29 03:29:34,762 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 384 transitions. [2020-10-29 03:29:34,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-29 03:29:34,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:29:34,764 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:29:34,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 03:29:34,765 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:29:34,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:29:34,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1548613473, now seen corresponding path program 12 times [2020-10-29 03:29:34,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:29:34,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122260978] [2020-10-29 03:29:34,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:29:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:29:34,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:29:34,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:29:34,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:29:34,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:29:35,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:29:35,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:29:37,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:29:39,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:29:39,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-29 03:29:39,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:29:39,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-29 03:29:39,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:29:39,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:29:39,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:29:39,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-29 03:29:39,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-29 03:29:39,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:29:40,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:29:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:29:40,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:29:40,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:29:40,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:29:40,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:29:40,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:29:40,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:29:40,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:29:40,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:29:40,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:29:40,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:29:40,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:29:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-29 03:29:40,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122260978] [2020-10-29 03:29:40,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:29:40,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:29:40,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678286085] [2020-10-29 03:29:40,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:29:40,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:29:40,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:29:40,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:29:40,233 INFO L87 Difference]: Start difference. First operand 355 states and 384 transitions. Second operand 16 states. [2020-10-29 03:29:43,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:29:43,072 INFO L93 Difference]: Finished difference Result 712 states and 775 transitions. [2020-10-29 03:29:43,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:29:43,074 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 145 [2020-10-29 03:29:43,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:29:43,078 INFO L225 Difference]: With dead ends: 712 [2020-10-29 03:29:43,078 INFO L226 Difference]: Without dead ends: 279 [2020-10-29 03:29:43,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:29:43,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-29 03:29:43,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 260. [2020-10-29 03:29:43,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-29 03:29:43,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 278 transitions. [2020-10-29 03:29:43,103 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 278 transitions. Word has length 145 [2020-10-29 03:29:43,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:29:43,103 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 278 transitions. [2020-10-29 03:29:43,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:29:43,104 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 278 transitions. [2020-10-29 03:29:43,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-29 03:29:43,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:29:43,106 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:29:43,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 03:29:43,106 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:29:43,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:29:43,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1640639587, now seen corresponding path program 13 times [2020-10-29 03:29:43,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:29:43,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159205646] [2020-10-29 03:29:43,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:29:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:29:43,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:29:43,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:29:43,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:29:43,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:29:43,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:29:43,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:29:48,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:29:48,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-29 03:29:48,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:29:48,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-29 03:29:48,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:29:48,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:29:48,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:29:48,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:29:48,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 03:29:48,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:29:48,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:29:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:29:48,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:29:48,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:29:48,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:29:48,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:29:48,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:29:48,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:29:48,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:29:48,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:29:48,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:29:48,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:29:48,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:29:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2020-10-29 03:29:48,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159205646] [2020-10-29 03:29:48,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:29:48,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:29:48,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605785460] [2020-10-29 03:29:48,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:29:48,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:29:48,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:29:48,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:29:48,538 INFO L87 Difference]: Start difference. First operand 260 states and 278 transitions. Second operand 16 states. [2020-10-29 03:29:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:29:51,205 INFO L93 Difference]: Finished difference Result 268 states and 286 transitions. [2020-10-29 03:29:51,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:29:51,207 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 147 [2020-10-29 03:29:51,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:29:51,209 INFO L225 Difference]: With dead ends: 268 [2020-10-29 03:29:51,209 INFO L226 Difference]: Without dead ends: 166 [2020-10-29 03:29:51,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:29:51,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-29 03:29:51,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2020-10-29 03:29:51,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-29 03:29:51,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 176 transitions. [2020-10-29 03:29:51,225 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 176 transitions. Word has length 147 [2020-10-29 03:29:51,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:29:51,225 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 176 transitions. [2020-10-29 03:29:51,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:29:51,225 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 176 transitions. [2020-10-29 03:29:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-29 03:29:51,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:29:51,228 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:29:51,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 03:29:51,228 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:29:51,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:29:51,228 INFO L82 PathProgramCache]: Analyzing trace with hash -760654667, now seen corresponding path program 14 times [2020-10-29 03:29:51,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:29:51,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679109203] [2020-10-29 03:29:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:29:51,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:29:51,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:29:58,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:29:58,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-29 03:29:58,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:29:58,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7156 [2020-10-29 03:29:58,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:29:58,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:29:58,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 128 [2020-10-29 03:29:58,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:29:58,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-29 03:29:58,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:30:01,252 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-29 03:30:01,445 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-10-29 03:30:01,641 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-10-29 03:30:01,857 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-10-29 03:30:02,068 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-10-29 03:30:02,291 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-10-29 03:30:02,511 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-10-29 03:30:02,755 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-10-29 03:30:02,986 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-10-29 03:30:03,228 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2020-10-29 03:30:03,494 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 19 [2020-10-29 03:30:03,963 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 15 [2020-10-29 03:30:04,235 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2020-10-29 03:30:04,523 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2020-10-29 03:30:04,825 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2020-10-29 03:30:05,122 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2020-10-29 03:30:05,439 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2020-10-29 03:30:05,754 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2020-10-29 03:30:06,087 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2020-10-29 03:30:06,359 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2020-10-29 03:30:06,666 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2020-10-29 03:30:07,063 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-29 03:30:08,610 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2020-10-29 03:30:09,056 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2020-10-29 03:30:09,530 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 25 [2020-10-29 03:30:10,795 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2020-10-29 03:30:11,120 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-10-29 03:30:11,473 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2020-10-29 03:30:11,935 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2020-10-29 03:30:12,360 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2020-10-29 03:30:12,776 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2020-10-29 03:30:13,270 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-29 03:30:13,796 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-10-29 03:30:14,294 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-29 03:30:16,327 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-10-29 03:30:16,838 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-29 03:30:17,355 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-29 03:30:19,858 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-29 03:30:20,316 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-29 03:30:20,795 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50