/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:09:46,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:09:46,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:09:46,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:09:46,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:09:46,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:09:46,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:09:46,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:09:46,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:09:46,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:09:46,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:09:46,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:09:46,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:09:47,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:09:47,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:09:47,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:09:47,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:09:47,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:09:47,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:09:47,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:09:47,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:09:47,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:09:47,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:09:47,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:09:47,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:09:47,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:09:47,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:09:47,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:09:47,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:09:47,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:09:47,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:09:47,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:09:47,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:09:47,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:09:47,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:09:47,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:09:47,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:09:47,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:09:47,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:09:47,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:09:47,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:09:47,069 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:09:47,128 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:09:47,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:09:47,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:09:47,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:09:47,134 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:09:47,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:09:47,134 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:09:47,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:09:47,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:09:47,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:09:47,136 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:09:47,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:09:47,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:09:47,137 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:09:47,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:09:47,138 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:09:47,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:09:47,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:09:47,138 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:09:47,138 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:09:47,139 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:09:47,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:09:47,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:09:47,140 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:09:47,140 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:09:47,140 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:09:47,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:09:47,141 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:09:47,141 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:09:47,141 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:09:47,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:09:47,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:09:47,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:09:47,672 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:09:47,673 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:09:47,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m3.c [2020-10-26 19:09:47,769 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/841995f35/c5a6ed8c6b5745308f71a5075b0ee678/FLAG1b171f142 [2020-10-26 19:09:48,488 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:09:48,489 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const_m3.c [2020-10-26 19:09:48,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/841995f35/c5a6ed8c6b5745308f71a5075b0ee678/FLAG1b171f142 [2020-10-26 19:09:48,835 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/841995f35/c5a6ed8c6b5745308f71a5075b0ee678 [2020-10-26 19:09:48,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:09:48,848 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:09:48,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:09:48,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:09:48,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:09:48,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:09:48" (1/1) ... [2020-10-26 19:09:48,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2945b9b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:48, skipping insertion in model container [2020-10-26 19:09:48,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:09:48" (1/1) ... [2020-10-26 19:09:48,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:09:48,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:09:49,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:09:49,140 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:09:49,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:09:49,236 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:09:49,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:49 WrapperNode [2020-10-26 19:09:49,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:09:49,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:09:49,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:09:49,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:09:49,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:49" (1/1) ... [2020-10-26 19:09:49,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:49" (1/1) ... [2020-10-26 19:09:49,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:49" (1/1) ... [2020-10-26 19:09:49,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:49" (1/1) ... [2020-10-26 19:09:49,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:49" (1/1) ... [2020-10-26 19:09:49,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:49" (1/1) ... [2020-10-26 19:09:49,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:49" (1/1) ... [2020-10-26 19:09:49,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:09:49,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:09:49,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:09:49,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:09:49,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:09:49,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:09:49,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:09:49,476 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:09:49,477 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:09:49,478 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:09:49,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:09:49,479 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:09:49,481 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:09:49,481 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:09:49,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:09:49,483 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:09:49,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:09:49,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-26 19:09:49,484 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:09:49,484 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:09:49,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:09:49,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:09:49,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:09:49,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:09:49,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:09:49,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:09:49,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:09:50,186 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:09:50,187 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-26 19:09:50,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:09:50 BoogieIcfgContainer [2020-10-26 19:09:50,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:09:50,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:09:50,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:09:50,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:09:50,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:09:48" (1/3) ... [2020-10-26 19:09:50,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc95b85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:09:50, skipping insertion in model container [2020-10-26 19:09:50,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:09:49" (2/3) ... [2020-10-26 19:09:50,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc95b85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:09:50, skipping insertion in model container [2020-10-26 19:09:50,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:09:50" (3/3) ... [2020-10-26 19:09:50,209 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m3.c [2020-10-26 19:09:50,230 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:09:50,240 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:09:50,260 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:09:50,320 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:09:50,321 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:09:50,321 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:09:50,321 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:09:50,321 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:09:50,322 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:09:50,322 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:09:50,323 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:09:50,359 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-26 19:09:50,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:09:50,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:09:50,381 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] [2020-10-26 19:09:50,382 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:09:50,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:09:50,397 INFO L82 PathProgramCache]: Analyzing trace with hash -645642689, now seen corresponding path program 1 times [2020-10-26 19:09:50,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:09:50,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784676834] [2020-10-26 19:09:50,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:09:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:50,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:50,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:50,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:50,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:50,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:51,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:51,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:51,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:52,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:52,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:09:52,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:09:52,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2335 [2020-10-26 19:09:52,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:52,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:09:52,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:09:52,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:09:52,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-26 19:09:53,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:09:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:53,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:53,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:53,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:09:53,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:09:53,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:09:53,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:53,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:09:53,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:09:53,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:09:53,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:09:53,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784676834] [2020-10-26 19:09:53,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:09:53,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:09:53,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960536441] [2020-10-26 19:09:53,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:09:53,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:09:53,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:09:53,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:09:53,285 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 4 states. [2020-10-26 19:09:53,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:09:53,557 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2020-10-26 19:09:53,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:09:53,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-26 19:09:53,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:09:53,572 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:09:53,573 INFO L226 Difference]: Without dead ends: 35 [2020-10-26 19:09:53,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:09:53,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-26 19:09:53,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-26 19:09:53,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:09:53,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-10-26 19:09:53,653 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 25 [2020-10-26 19:09:53,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:09:53,654 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-10-26 19:09:53,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:09:53,655 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-10-26 19:09:53,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:09:53,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:09:53,657 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] [2020-10-26 19:09:53,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:09:53,657 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:09:53,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:09:53,659 INFO L82 PathProgramCache]: Analyzing trace with hash -640041645, now seen corresponding path program 1 times [2020-10-26 19:09:53,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:09:53,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28069669] [2020-10-26 19:09:53,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:09:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:53,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:53,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:53,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:53,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:53,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:53,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:53,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:56,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:58,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:58,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:09:58,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:09:58,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:09:58,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:58,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:09:58,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:09:58,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:09:58,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:09:58,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:09:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:58,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:58,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:58,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:09:58,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:09:58,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:09:58,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:58,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:09:58,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:09:58,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:09:58,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:09:58,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28069669] [2020-10-26 19:09:58,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:09:58,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:09:58,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664877258] [2020-10-26 19:09:58,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:09:58,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:09:58,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:09:58,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:09:58,850 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 5 states. [2020-10-26 19:09:59,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:09:59,195 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2020-10-26 19:09:59,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:09:59,196 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-10-26 19:09:59,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:09:59,198 INFO L225 Difference]: With dead ends: 68 [2020-10-26 19:09:59,198 INFO L226 Difference]: Without dead ends: 47 [2020-10-26 19:09:59,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:09:59,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-26 19:09:59,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-10-26 19:09:59,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-26 19:09:59,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-26 19:09:59,211 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 27 [2020-10-26 19:09:59,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:09:59,212 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-26 19:09:59,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:09:59,212 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-26 19:09:59,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:09:59,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:09:59,214 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] [2020-10-26 19:09:59,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:09:59,214 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:09:59,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:09:59,215 INFO L82 PathProgramCache]: Analyzing trace with hash -265634913, now seen corresponding path program 1 times [2020-10-26 19:09:59,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:09:59,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553908625] [2020-10-26 19:09:59,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:09:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:59,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:59,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:59,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:59,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:59,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:59,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:01,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:04,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:04,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:10:04,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:10:04,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:10:04,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:04,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:10:04,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:04,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:10:04,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:04,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:04,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:04,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:04,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:04,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:04,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:10:04,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:04,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:04,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:04,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:04,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:10:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-26 19:10:04,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553908625] [2020-10-26 19:10:04,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:04,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:10:04,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928496565] [2020-10-26 19:10:04,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:10:04,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:04,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:10:04,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:10:04,405 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2020-10-26 19:10:04,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:04,799 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2020-10-26 19:10:04,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:10:04,801 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-10-26 19:10:04,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:04,802 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:10:04,802 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:10:04,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:10:04,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:10:04,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-26 19:10:04,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:10:04,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-26 19:10:04,816 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 39 [2020-10-26 19:10:04,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:04,817 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-26 19:10:04,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:10:04,817 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-26 19:10:04,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:10:04,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:04,820 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 19:10:04,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:10:04,821 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:04,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:04,822 INFO L82 PathProgramCache]: Analyzing trace with hash 2136437933, now seen corresponding path program 2 times [2020-10-26 19:10:04,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:04,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789905244] [2020-10-26 19:10:04,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:04,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:05,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:06,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:07,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:08,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:09,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:09,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:10:09,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:10:09,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:10:09,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:09,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:10:09,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:09,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-26 19:10:09,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:11,149 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 33 [2020-10-26 19:10:11,852 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 35 [2020-10-26 19:10:12,043 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 32 [2020-10-26 19:10:13,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:13,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:13,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:13,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:13,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:13,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:10:13,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:13,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:13,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:13,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:13,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:10:13,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789905244] [2020-10-26 19:10:13,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:13,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:10:13,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953288873] [2020-10-26 19:10:13,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:10:13,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:13,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:10:13,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:10:13,296 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 33 states. [2020-10-26 19:10:14,130 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-10-26 19:10:14,506 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2020-10-26 19:10:14,835 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-26 19:10:15,310 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-26 19:10:15,606 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-26 19:10:15,836 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-26 19:10:16,305 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-26 19:10:17,472 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-26 19:10:18,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:18,448 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2020-10-26 19:10:18,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-26 19:10:18,450 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 53 [2020-10-26 19:10:18,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:18,451 INFO L225 Difference]: With dead ends: 123 [2020-10-26 19:10:18,452 INFO L226 Difference]: Without dead ends: 117 [2020-10-26 19:10:18,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=339, Invalid=2967, Unknown=0, NotChecked=0, Total=3306 [2020-10-26 19:10:18,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-26 19:10:18,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 89. [2020-10-26 19:10:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 19:10:18,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-10-26 19:10:18,476 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 53 [2020-10-26 19:10:18,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:18,477 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-10-26 19:10:18,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:10:18,477 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-10-26 19:10:18,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:10:18,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:18,481 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-26 19:10:18,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:10:18,483 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:18,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:18,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1961610833, now seen corresponding path program 3 times [2020-10-26 19:10:18,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:18,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400786696] [2020-10-26 19:10:18,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:18,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:18,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:18,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:18,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:19,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:23,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:23,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:10:23,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:10:23,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:10:23,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:23,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:10:23,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:23,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:10:23,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:10:23,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:23,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:23,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:23,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:23,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:23,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:10:23,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:23,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:23,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:23,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:23,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-26 19:10:23,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400786696] [2020-10-26 19:10:23,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:23,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:10:23,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222328577] [2020-10-26 19:10:23,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:10:23,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:23,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:10:23,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:10:23,700 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 10 states. [2020-10-26 19:10:24,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:24,207 INFO L93 Difference]: Finished difference Result 185 states and 212 transitions. [2020-10-26 19:10:24,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:10:24,208 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-26 19:10:24,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:24,210 INFO L225 Difference]: With dead ends: 185 [2020-10-26 19:10:24,211 INFO L226 Difference]: Without dead ends: 111 [2020-10-26 19:10:24,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:10:24,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-26 19:10:24,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-26 19:10:24,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-26 19:10:24,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2020-10-26 19:10:24,253 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 55 [2020-10-26 19:10:24,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:24,253 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2020-10-26 19:10:24,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:10:24,254 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2020-10-26 19:10:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:10:24,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:24,258 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-26 19:10:24,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:10:24,258 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:24,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:24,264 INFO L82 PathProgramCache]: Analyzing trace with hash -943658769, now seen corresponding path program 4 times [2020-10-26 19:10:24,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:24,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346905810] [2020-10-26 19:10:24,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:24,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:24,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:24,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:24,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:25,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:29,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:29,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:10:29,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:10:29,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:10:29,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:29,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:10:29,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:29,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:10:29,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:29,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:29,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:29,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:29,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:29,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:29,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:10:29,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:29,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:29,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:29,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:29,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-26 19:10:29,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346905810] [2020-10-26 19:10:29,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:29,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:10:29,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235760688] [2020-10-26 19:10:29,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:10:29,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:29,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:10:29,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:10:29,450 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand 10 states. [2020-10-26 19:10:29,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:29,943 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2020-10-26 19:10:29,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:10:29,944 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-26 19:10:29,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:29,945 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:10:29,945 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:10:29,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:10:29,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:10:29,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-26 19:10:29,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-26 19:10:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2020-10-26 19:10:29,972 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 55 [2020-10-26 19:10:29,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:29,973 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2020-10-26 19:10:29,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:10:29,973 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2020-10-26 19:10:29,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:10:29,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:29,980 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 19:10:29,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:10:29,980 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:29,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:29,982 INFO L82 PathProgramCache]: Analyzing trace with hash 220708155, now seen corresponding path program 5 times [2020-10-26 19:10:29,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:29,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152015537] [2020-10-26 19:10:29,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:30,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:30,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:30,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:31,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:35,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:35,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:10:35,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:10:35,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:10:35,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:35,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:10:35,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:35,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-26 19:10:35,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:37,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:37,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:37,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:37,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:37,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:37,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:10:37,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:37,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:37,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:37,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:37,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:37,485 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:10:37,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152015537] [2020-10-26 19:10:37,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:37,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:10:37,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079943670] [2020-10-26 19:10:37,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:10:37,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:37,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:10:37,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1470, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:10:37,489 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 40 states. [2020-10-26 19:10:39,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:39,841 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2020-10-26 19:10:39,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:10:39,842 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 67 [2020-10-26 19:10:39,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:39,844 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:10:39,844 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:10:39,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=105, Invalid=1701, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:10:39,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:10:39,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2020-10-26 19:10:39,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-26 19:10:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2020-10-26 19:10:39,864 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 67 [2020-10-26 19:10:39,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:39,864 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2020-10-26 19:10:39,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:10:39,864 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2020-10-26 19:10:39,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:10:39,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:39,866 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-26 19:10:39,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:10:39,866 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:39,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:39,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1660752195, now seen corresponding path program 6 times [2020-10-26 19:10:39,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:39,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466666425] [2020-10-26 19:10:39,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:39,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:39,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:39,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:39,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:41,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:44,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:44,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:10:44,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:10:44,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:10:44,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:44,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:10:44,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:44,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:10:44,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:45,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:45,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:45,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:45,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:45,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:45,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:10:45,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:45,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:45,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:45,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:45,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-26 19:10:45,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466666425] [2020-10-26 19:10:45,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:45,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:10:45,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923158135] [2020-10-26 19:10:45,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:10:45,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:45,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:10:45,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:10:45,048 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand 12 states. [2020-10-26 19:10:45,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:45,723 INFO L93 Difference]: Finished difference Result 223 states and 249 transitions. [2020-10-26 19:10:45,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:10:45,724 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-10-26 19:10:45,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:45,726 INFO L225 Difference]: With dead ends: 223 [2020-10-26 19:10:45,726 INFO L226 Difference]: Without dead ends: 127 [2020-10-26 19:10:45,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:10:45,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-26 19:10:45,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 112. [2020-10-26 19:10:45,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-26 19:10:45,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2020-10-26 19:10:45,747 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 69 [2020-10-26 19:10:45,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:45,748 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2020-10-26 19:10:45,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:10:45,748 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2020-10-26 19:10:45,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:10:45,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:45,750 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-10-26 19:10:45,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:10:45,750 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:45,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:45,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1681641087, now seen corresponding path program 7 times [2020-10-26 19:10:45,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:45,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857901713] [2020-10-26 19:10:45,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:45,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:45,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:45,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:45,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:46,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:50,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:50,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:10:50,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:10:50,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:10:50,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:50,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:10:50,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:50,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:10:50,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:50,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:50,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:50,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:50,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:50,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:50,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:10:50,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:50,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:50,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:50,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:50,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:10:50,937 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-26 19:10:50,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857901713] [2020-10-26 19:10:50,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:50,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:10:50,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692672982] [2020-10-26 19:10:50,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:10:50,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:50,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:10:50,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:10:50,944 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand 12 states. [2020-10-26 19:10:51,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:51,633 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2020-10-26 19:10:51,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:10:51,634 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-10-26 19:10:51,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:51,637 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:10:51,637 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:10:51,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:10:51,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:10:51,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-26 19:10:51,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:10:51,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2020-10-26 19:10:51,648 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 71 [2020-10-26 19:10:51,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:51,649 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2020-10-26 19:10:51,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:10:51,649 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2020-10-26 19:10:51,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:10:51,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:51,650 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 19:10:51,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:10:51,651 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:51,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1386580663, now seen corresponding path program 8 times [2020-10-26 19:10:51,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:51,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498911484] [2020-10-26 19:10:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:51,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:52,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:54,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:55,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:56,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:56,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:10:56,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:10:56,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:10:56,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:56,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-26 19:10:56,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:56,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-26 19:10:56,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:02,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:02,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:02,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:02,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:02,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:02,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:11:02,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:02,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:02,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:02,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:02,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 2 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:11:03,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498911484] [2020-10-26 19:11:03,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:03,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-26 19:11:03,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715834438] [2020-10-26 19:11:03,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-26 19:11:03,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:03,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-26 19:11:03,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=3201, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:11:03,060 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand 59 states. [2020-10-26 19:11:03,484 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 39 [2020-10-26 19:11:04,675 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-26 19:11:04,901 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-26 19:11:05,182 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-26 19:11:05,713 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2020-10-26 19:11:06,081 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-26 19:11:07,052 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2020-10-26 19:11:07,380 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2020-10-26 19:11:08,000 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-10-26 19:11:08,695 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-10-26 19:11:09,321 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-26 19:11:09,688 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-26 19:11:09,951 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-26 19:11:10,290 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-26 19:11:11,569 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-26 19:11:12,039 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 35 [2020-10-26 19:11:12,734 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2020-10-26 19:11:13,015 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-26 19:11:13,756 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-26 19:11:17,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:11:17,826 INFO L93 Difference]: Finished difference Result 202 states and 222 transitions. [2020-10-26 19:11:17,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-10-26 19:11:17,828 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 81 [2020-10-26 19:11:17,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:11:17,829 INFO L225 Difference]: With dead ends: 202 [2020-10-26 19:11:17,830 INFO L226 Difference]: Without dead ends: 196 [2020-10-26 19:11:17,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=723, Invalid=10407, Unknown=0, NotChecked=0, Total=11130 [2020-10-26 19:11:17,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-26 19:11:17,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 137. [2020-10-26 19:11:17,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-26 19:11:17,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 149 transitions. [2020-10-26 19:11:17,849 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 149 transitions. Word has length 81 [2020-10-26 19:11:17,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:11:17,850 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 149 transitions. [2020-10-26 19:11:17,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-26 19:11:17,850 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 149 transitions. [2020-10-26 19:11:17,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:11:17,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:11:17,851 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-26 19:11:17,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:11:17,852 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:11:17,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:11:17,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1673643189, now seen corresponding path program 9 times [2020-10-26 19:11:17,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:11:17,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399244831] [2020-10-26 19:11:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:11:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:17,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:17,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:17,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:18,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:18,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:22,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:22,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:11:22,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:11:22,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:11:22,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:22,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:11:22,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:11:22,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:11:22,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:23,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:23,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:23,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:23,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:23,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:23,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:11:23,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:23,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:23,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:23,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:23,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-26 19:11:23,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399244831] [2020-10-26 19:11:23,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:23,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:11:23,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238669926] [2020-10-26 19:11:23,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:11:23,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:23,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:11:23,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:11:23,104 INFO L87 Difference]: Start difference. First operand 137 states and 149 transitions. Second operand 14 states. [2020-10-26 19:11:24,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:11:24,194 INFO L93 Difference]: Finished difference Result 282 states and 310 transitions. [2020-10-26 19:11:24,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:11:24,195 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 83 [2020-10-26 19:11:24,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:11:24,196 INFO L225 Difference]: With dead ends: 282 [2020-10-26 19:11:24,196 INFO L226 Difference]: Without dead ends: 159 [2020-10-26 19:11:24,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:11:24,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-26 19:11:24,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 144. [2020-10-26 19:11:24,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-26 19:11:24,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 155 transitions. [2020-10-26 19:11:24,223 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 155 transitions. Word has length 83 [2020-10-26 19:11:24,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:11:24,224 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 155 transitions. [2020-10-26 19:11:24,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:11:24,224 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 155 transitions. [2020-10-26 19:11:24,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:11:24,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:11:24,227 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-26 19:11:24,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:11:24,228 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:11:24,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:11:24,228 INFO L82 PathProgramCache]: Analyzing trace with hash -2006527349, now seen corresponding path program 10 times [2020-10-26 19:11:24,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:11:24,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102731858] [2020-10-26 19:11:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:11:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:24,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:24,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:24,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:24,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:25,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:29,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:29,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:11:29,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:11:29,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:11:29,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:29,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:11:29,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:11:29,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:11:29,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:29,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:29,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:29,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:29,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:29,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:29,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:11:29,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:29,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:29,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:29,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:29,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-26 19:11:29,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102731858] [2020-10-26 19:11:29,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:29,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:11:29,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345953390] [2020-10-26 19:11:29,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:11:29,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:29,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:11:29,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:11:29,474 INFO L87 Difference]: Start difference. First operand 144 states and 155 transitions. Second operand 14 states. [2020-10-26 19:11:30,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:11:30,395 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2020-10-26 19:11:30,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:11:30,396 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 83 [2020-10-26 19:11:30,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:11:30,397 INFO L225 Difference]: With dead ends: 152 [2020-10-26 19:11:30,397 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:11:30,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:11:30,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:11:30,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-26 19:11:30,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-26 19:11:30,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2020-10-26 19:11:30,415 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 83 [2020-10-26 19:11:30,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:11:30,415 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2020-10-26 19:11:30,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:11:30,415 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2020-10-26 19:11:30,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-26 19:11:30,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:11:30,416 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 19:11:30,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:11:30,416 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:11:30,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:11:30,417 INFO L82 PathProgramCache]: Analyzing trace with hash -131695401, now seen corresponding path program 11 times [2020-10-26 19:11:30,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:11:30,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85837247] [2020-10-26 19:11:30,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:11:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:30,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:31,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:34,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:35,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:35,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-26 19:11:35,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:11:35,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:11:35,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:35,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-26 19:11:35,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:11:35,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-26 19:11:35,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:44,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:44,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:44,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:44,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:44,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:44,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:11:44,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:44,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:44,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:44,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:44,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-26 19:11:44,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85837247] [2020-10-26 19:11:44,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:44,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-26 19:11:44,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954054766] [2020-10-26 19:11:44,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-26 19:11:44,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:44,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-26 19:11:44,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=4397, Unknown=0, NotChecked=0, Total=4556 [2020-10-26 19:11:44,848 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand 68 states. [2020-10-26 19:11:45,408 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-26 19:11:53,735 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-26 19:12:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:12:01,630 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2020-10-26 19:12:01,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-26 19:12:01,631 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 95 [2020-10-26 19:12:01,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:12:01,633 INFO L225 Difference]: With dead ends: 165 [2020-10-26 19:12:01,633 INFO L226 Difference]: Without dead ends: 159 [2020-10-26 19:12:01,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=458, Invalid=12198, Unknown=0, NotChecked=0, Total=12656 [2020-10-26 19:12:01,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-26 19:12:01,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 149. [2020-10-26 19:12:01,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-26 19:12:01,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2020-10-26 19:12:01,658 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 95 [2020-10-26 19:12:01,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:12:01,659 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2020-10-26 19:12:01,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-26 19:12:01,659 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2020-10-26 19:12:01,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:12:01,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:12:01,660 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-26 19:12:01,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:12:01,661 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:12:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:12:01,661 INFO L82 PathProgramCache]: Analyzing trace with hash 314898265, now seen corresponding path program 12 times [2020-10-26 19:12:01,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:12:01,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263578410] [2020-10-26 19:12:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:12:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:01,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:01,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:01,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:01,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:03,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:06,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:06,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:12:06,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:12:06,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:12:06,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:06,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:12:06,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:12:06,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:12:06,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:06,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:12:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:06,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:06,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:06,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:12:06,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:12:06,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:12:06,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:06,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:12:06,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:12:06,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:12:06,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-10-26 19:12:06,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263578410] [2020-10-26 19:12:06,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:12:06,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:12:06,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166965178] [2020-10-26 19:12:06,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:12:06,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:12:06,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:12:06,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:12:06,977 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand 16 states. [2020-10-26 19:12:08,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:12:08,342 INFO L93 Difference]: Finished difference Result 311 states and 337 transitions. [2020-10-26 19:12:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:12:08,344 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-10-26 19:12:08,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:12:08,345 INFO L225 Difference]: With dead ends: 311 [2020-10-26 19:12:08,345 INFO L226 Difference]: Without dead ends: 171 [2020-10-26 19:12:08,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:12:08,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-26 19:12:08,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 156. [2020-10-26 19:12:08,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-26 19:12:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 166 transitions. [2020-10-26 19:12:08,365 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 166 transitions. Word has length 97 [2020-10-26 19:12:08,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:12:08,365 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 166 transitions. [2020-10-26 19:12:08,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:12:08,365 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 166 transitions. [2020-10-26 19:12:08,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-26 19:12:08,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:12:08,367 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2020-10-26 19:12:08,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:12:08,367 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:12:08,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:12:08,368 INFO L82 PathProgramCache]: Analyzing trace with hash 733863963, now seen corresponding path program 13 times [2020-10-26 19:12:08,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:12:08,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746302625] [2020-10-26 19:12:08,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:12:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:08,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:08,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:08,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:08,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:10,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:10,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:12,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:13,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:13,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 19:12:13,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:12:13,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:12:13,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:13,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:12:13,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:12:13,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:12:13,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:13,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:12:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:13,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:13,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:13,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:12:13,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:12:13,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:12:13,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:13,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:12:13,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:12:13,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:12:13,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-10-26 19:12:13,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746302625] [2020-10-26 19:12:13,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:12:13,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:12:13,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612954280] [2020-10-26 19:12:13,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:12:13,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:12:13,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:12:13,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:12:13,706 INFO L87 Difference]: Start difference. First operand 156 states and 166 transitions. Second operand 16 states. [2020-10-26 19:12:15,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:12:15,103 INFO L93 Difference]: Finished difference Result 164 states and 174 transitions. [2020-10-26 19:12:15,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:12:15,104 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2020-10-26 19:12:15,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:12:15,106 INFO L225 Difference]: With dead ends: 164 [2020-10-26 19:12:15,106 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:12:15,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:12:15,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:12:15,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-10-26 19:12:15,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:12:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2020-10-26 19:12:15,120 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 99 [2020-10-26 19:12:15,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:12:15,120 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2020-10-26 19:12:15,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:12:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2020-10-26 19:12:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 19:12:15,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:12:15,122 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 19:12:15,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:12:15,122 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:12:15,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:12:15,123 INFO L82 PathProgramCache]: Analyzing trace with hash -667241499, now seen corresponding path program 14 times [2020-10-26 19:12:15,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:12:15,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684262348] [2020-10-26 19:12:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:12:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:15,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:16,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:20,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:22,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:22,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 19:12:22,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:12:22,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6869 [2020-10-26 19:12:22,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:22,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-26 19:12:22,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:12:22,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-26 19:12:22,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:37,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:12:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:37,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:37,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:37,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:12:37,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:12:37,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:12:37,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:37,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:12:37,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:12:37,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:12:37,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-26 19:12:38,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684262348] [2020-10-26 19:12:38,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:12:38,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-26 19:12:38,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291143324] [2020-10-26 19:12:38,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-26 19:12:38,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:12:38,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-26 19:12:38,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=5393, Unknown=0, NotChecked=0, Total=5550 [2020-10-26 19:12:38,099 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand 75 states. [2020-10-26 19:12:53,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:12:53,102 INFO L93 Difference]: Finished difference Result 190 states and 201 transitions. [2020-10-26 19:12:53,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-26 19:12:53,104 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 109 [2020-10-26 19:12:53,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:12:53,106 INFO L225 Difference]: With dead ends: 190 [2020-10-26 19:12:53,107 INFO L226 Difference]: Without dead ends: 184 [2020-10-26 19:12:53,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=167, Invalid=5685, Unknown=0, NotChecked=0, Total=5852 [2020-10-26 19:12:53,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-26 19:12:53,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 171. [2020-10-26 19:12:53,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-26 19:12:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 182 transitions. [2020-10-26 19:12:53,132 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 182 transitions. Word has length 109 [2020-10-26 19:12:53,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:12:53,133 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 182 transitions. [2020-10-26 19:12:53,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-26 19:12:53,133 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 182 transitions. [2020-10-26 19:12:53,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-26 19:12:53,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:12:53,134 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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] [2020-10-26 19:12:53,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:12:53,135 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:12:53,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:12:53,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1626471705, now seen corresponding path program 15 times [2020-10-26 19:12:53,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:12:53,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294837866] [2020-10-26 19:12:53,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:12:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:53,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:53,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:53,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:53,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:55,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:58,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:58,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-26 19:12:58,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:12:58,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:12:58,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:58,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:12:58,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:12:58,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:12:58,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:58,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:12:58,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:12:58,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:12:58,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:12:58,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:12:58,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:12:58,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:12:58,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:12:58,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:12:58,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:12:58,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:12:58,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:12:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-26 19:12:58,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294837866] [2020-10-26 19:12:58,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:12:58,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:12:58,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976296857] [2020-10-26 19:12:58,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:12:58,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:12:58,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:12:58,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:12:58,557 INFO L87 Difference]: Start difference. First operand 171 states and 182 transitions. Second operand 18 states. [2020-10-26 19:13:00,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:00,361 INFO L93 Difference]: Finished difference Result 355 states and 381 transitions. [2020-10-26 19:13:00,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:13:00,363 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 111 [2020-10-26 19:13:00,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:00,365 INFO L225 Difference]: With dead ends: 355 [2020-10-26 19:13:00,365 INFO L226 Difference]: Without dead ends: 193 [2020-10-26 19:13:00,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:13:00,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-26 19:13:00,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 178. [2020-10-26 19:13:00,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-26 19:13:00,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 188 transitions. [2020-10-26 19:13:00,386 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 188 transitions. Word has length 111 [2020-10-26 19:13:00,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:00,386 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 188 transitions. [2020-10-26 19:13:00,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:13:00,387 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 188 transitions. [2020-10-26 19:13:00,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-26 19:13:00,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:00,388 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 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] [2020-10-26 19:13:00,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:13:00,388 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:00,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:00,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1013588009, now seen corresponding path program 16 times [2020-10-26 19:13:00,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:00,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945652681] [2020-10-26 19:13:00,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:00,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:00,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:00,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:00,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:03,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:05,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:05,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 19:13:05,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:13:05,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:13:05,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:05,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:13:05,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:13:05,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:13:05,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:05,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:05,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:05,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:05,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:05,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:05,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:13:05,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:05,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:05,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:05,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:05,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2020-10-26 19:13:05,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945652681] [2020-10-26 19:13:05,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:05,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:13:05,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68278008] [2020-10-26 19:13:05,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:13:05,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:05,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:13:05,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:13:05,867 INFO L87 Difference]: Start difference. First operand 178 states and 188 transitions. Second operand 18 states. [2020-10-26 19:13:07,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:07,875 INFO L93 Difference]: Finished difference Result 186 states and 196 transitions. [2020-10-26 19:13:07,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:13:07,877 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 113 [2020-10-26 19:13:07,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:07,879 INFO L225 Difference]: With dead ends: 186 [2020-10-26 19:13:07,879 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:13:07,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=243, Invalid=813, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:13:07,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:13:07,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-26 19:13:07,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-26 19:13:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2020-10-26 19:13:07,901 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 113 [2020-10-26 19:13:07,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:07,901 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2020-10-26 19:13:07,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:13:07,902 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2020-10-26 19:13:07,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-26 19:13:07,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:07,903 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:07,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:13:07,903 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:07,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:07,904 INFO L82 PathProgramCache]: Analyzing trace with hash -658638221, now seen corresponding path program 17 times [2020-10-26 19:13:07,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:07,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059249580] [2020-10-26 19:13:07,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:08,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:11,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:14,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:14,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-26 19:13:14,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:13:14,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6084 [2020-10-26 19:13:14,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:14,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 97 [2020-10-26 19:13:14,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:13:14,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-26 19:13:14,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:16,768 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-26 19:13:17,007 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-10-26 19:13:17,240 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-26 19:13:17,491 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-10-26 19:13:17,768 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-26 19:13:18,061 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-26 19:13:18,341 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-26 19:13:18,718 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-26 19:13:19,065 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-26 19:13:19,458 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-26 19:13:19,819 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-26 19:13:20,199 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-26 19:13:20,581 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-26 19:13:21,448 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-26 19:13:21,752 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-26 19:13:22,074 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-26 19:13:22,448 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-26 19:13:22,877 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-10-26 19:13:23,281 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-26 19:13:23,698 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-26 19:13:24,141 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-26 19:13:24,572 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-26 19:13:24,992 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-26 19:13:25,565 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-26 19:13:26,169 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51