/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/eca-rers2012/Problem13_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 23:06:34,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 23:06:34,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 23:06:34,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 23:06:34,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 23:06:34,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 23:06:34,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 23:06:34,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 23:06:34,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 23:06:34,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 23:06:34,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 23:06:34,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 23:06:34,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 23:06:34,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 23:06:34,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 23:06:34,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 23:06:34,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 23:06:34,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 23:06:34,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 23:06:34,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 23:06:34,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 23:06:34,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 23:06:34,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 23:06:34,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 23:06:34,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 23:06:34,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 23:06:34,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 23:06:34,226 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 23:06:34,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 23:06:34,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 23:06:34,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 23:06:34,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 23:06:34,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 23:06:34,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 23:06:34,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 23:06:34,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 23:06:34,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 23:06:34,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 23:06:34,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 23:06:34,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 23:06:34,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 23:06:34,247 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 23:06:34,307 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 23:06:34,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 23:06:34,313 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 23:06:34,314 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 23:06:34,314 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 23:06:34,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 23:06:34,314 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 23:06:34,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 23:06:34,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 23:06:34,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 23:06:34,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 23:06:34,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 23:06:34,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 23:06:34,318 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 23:06:34,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 23:06:34,318 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 23:06:34,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 23:06:34,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 23:06:34,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 23:06:34,319 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 23:06:34,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 23:06:34,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 23:06:34,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 23:06:34,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 23:06:34,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 23:06:34,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 23:06:34,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 23:06:34,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 23:06:34,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 23:06:34,321 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 23:06:34,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 23:06:34,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 23:06:34,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 23:06:34,905 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 23:06:34,906 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 23:06:34,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label14.c [2020-10-26 23:06:35,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53144ccc8/e087fb284e0c465e852bb74e5fc91828/FLAG6edce75f9 [2020-10-26 23:06:36,273 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 23:06:36,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label14.c [2020-10-26 23:06:36,323 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53144ccc8/e087fb284e0c465e852bb74e5fc91828/FLAG6edce75f9 [2020-10-26 23:06:36,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53144ccc8/e087fb284e0c465e852bb74e5fc91828 [2020-10-26 23:06:36,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 23:06:36,697 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 23:06:36,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 23:06:36,700 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 23:06:36,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 23:06:36,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:06:36" (1/1) ... [2020-10-26 23:06:36,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f2351fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:36, skipping insertion in model container [2020-10-26 23:06:36,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 11:06:36" (1/1) ... [2020-10-26 23:06:36,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 23:06:36,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 23:06:38,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:06:38,805 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 23:06:39,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 23:06:39,768 INFO L208 MainTranslator]: Completed translation [2020-10-26 23:06:39,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:39 WrapperNode [2020-10-26 23:06:39,771 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 23:06:39,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 23:06:39,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 23:06:39,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 23:06:39,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:39" (1/1) ... [2020-10-26 23:06:39,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:39" (1/1) ... [2020-10-26 23:06:39,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:39" (1/1) ... [2020-10-26 23:06:39,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:39" (1/1) ... [2020-10-26 23:06:40,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:39" (1/1) ... [2020-10-26 23:06:40,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:39" (1/1) ... [2020-10-26 23:06:40,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:39" (1/1) ... [2020-10-26 23:06:40,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 23:06:40,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 23:06:40,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 23:06:40,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 23:06:40,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:39" (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 23:06:40,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 23:06:40,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 23:06:40,478 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 23:06:40,478 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 23:06:40,479 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 23:06:40,479 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 23:06:40,479 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 23:06:40,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 23:06:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 23:06:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 23:06:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 23:06:40,481 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 23:06:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 23:06:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 23:06:40,482 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 23:06:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 23:06:40,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 23:06:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 23:06:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 23:06:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 23:06:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 23:06:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 23:06:40,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 23:06:40,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 23:06:40,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 23:06:51,779 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 23:06:51,781 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 23:06:51,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:06:51 BoogieIcfgContainer [2020-10-26 23:06:51,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 23:06:51,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 23:06:51,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 23:06:51,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 23:06:51,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 11:06:36" (1/3) ... [2020-10-26 23:06:51,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152fee96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:06:51, skipping insertion in model container [2020-10-26 23:06:51,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 11:06:39" (2/3) ... [2020-10-26 23:06:51,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152fee96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 11:06:51, skipping insertion in model container [2020-10-26 23:06:51,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 11:06:51" (3/3) ... [2020-10-26 23:06:51,804 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label14.c [2020-10-26 23:06:51,820 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 23:06:51,828 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 23:06:51,845 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 23:06:51,887 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 23:06:51,887 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 23:06:51,887 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 23:06:51,888 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 23:06:51,888 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 23:06:51,888 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 23:06:51,888 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 23:06:51,888 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 23:06:52,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-26 23:06:52,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 23:06:52,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:06:52,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:06:52,022 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:06:52,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:06:52,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2111073506, now seen corresponding path program 1 times [2020-10-26 23:06:52,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:06:52,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516197084] [2020-10-26 23:06:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:06:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:52,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:52,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:52,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 23:06:52,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:06:52,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 701 [2020-10-26 23:06:52,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:52,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:06:52,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:06:52,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-26 23:06:52,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:06:53,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:06:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:06:53,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:06:53,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:06:53,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:06:53,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:06:53,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 23:06:53,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:06:53,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:06:53,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:06:53,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:06:53,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:06:53,192 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 23:06:53,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516197084] [2020-10-26 23:06:53,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:06:53,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 23:06:53,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202638861] [2020-10-26 23:06:53,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 23:06:53,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:06:53,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 23:06:53,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 23:06:53,228 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 5 states. [2020-10-26 23:07:16,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:07:16,200 INFO L93 Difference]: Finished difference Result 3235 states and 5915 transitions. [2020-10-26 23:07:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 23:07:16,204 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-10-26 23:07:16,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:07:16,254 INFO L225 Difference]: With dead ends: 3235 [2020-10-26 23:07:16,256 INFO L226 Difference]: Without dead ends: 2027 [2020-10-26 23:07:16,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 23:07:16,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2020-10-26 23:07:16,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 2010. [2020-10-26 23:07:16,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2010 states. [2020-10-26 23:07:16,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3292 transitions. [2020-10-26 23:07:16,500 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3292 transitions. Word has length 48 [2020-10-26 23:07:16,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:07:16,501 INFO L481 AbstractCegarLoop]: Abstraction has 2010 states and 3292 transitions. [2020-10-26 23:07:16,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 23:07:16,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3292 transitions. [2020-10-26 23:07:16,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-26 23:07:16,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:07:16,509 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:07:16,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 23:07:16,509 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:07:16,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:07:16,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1520322374, now seen corresponding path program 1 times [2020-10-26 23:07:16,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:07:16,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116099951] [2020-10-26 23:07:16,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:07:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:16,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:16,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:18,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:19,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:19,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-26 23:07:19,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:07:19,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2804 [2020-10-26 23:07:19,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:19,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:07:19,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:07:19,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 23:07:19,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 23:07:19,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:07:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:19,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:19,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:19,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:07:19,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:07:19,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 23:07:19,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:19,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:07:19,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:07:19,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:07:19,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-26 23:07:19,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:07:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:19,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:19,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:19,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 23:07:19,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:07:19,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-26 23:07:19,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:19,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:07:19,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:07:19,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 23:07:19,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:07:20,000 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:07:20,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116099951] [2020-10-26 23:07:20,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:07:20,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:07:20,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93485075] [2020-10-26 23:07:20,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:07:20,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:07:20,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:07:20,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:07:20,012 INFO L87 Difference]: Start difference. First operand 2010 states and 3292 transitions. Second operand 7 states. [2020-10-26 23:07:53,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:07:53,446 INFO L93 Difference]: Finished difference Result 5799 states and 9562 transitions. [2020-10-26 23:07:53,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 23:07:53,448 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2020-10-26 23:07:53,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:07:53,474 INFO L225 Difference]: With dead ends: 5799 [2020-10-26 23:07:53,474 INFO L226 Difference]: Without dead ends: 3795 [2020-10-26 23:07:53,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:07:53,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3795 states. [2020-10-26 23:07:53,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3795 to 3698. [2020-10-26 23:07:53,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3698 states. [2020-10-26 23:07:53,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3698 states to 3698 states and 5278 transitions. [2020-10-26 23:07:53,618 INFO L78 Accepts]: Start accepts. Automaton has 3698 states and 5278 transitions. Word has length 123 [2020-10-26 23:07:53,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:07:53,618 INFO L481 AbstractCegarLoop]: Abstraction has 3698 states and 5278 transitions. [2020-10-26 23:07:53,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:07:53,619 INFO L276 IsEmpty]: Start isEmpty. Operand 3698 states and 5278 transitions. [2020-10-26 23:07:53,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-26 23:07:53,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:07:53,623 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:07:53,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 23:07:53,623 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:07:53,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:07:53,624 INFO L82 PathProgramCache]: Analyzing trace with hash 544995422, now seen corresponding path program 1 times [2020-10-26 23:07:53,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:07:53,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553687821] [2020-10-26 23:07:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:07:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:53,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:53,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:54,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:54,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-26 23:07:54,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:07:54,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 945 [2020-10-26 23:07:54,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:54,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:07:54,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:07:54,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-26 23:07:54,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:07:54,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:07:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:54,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:54,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:54,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:07:54,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:07:54,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 23:07:54,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:54,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:07:54,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:07:54,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:07:54,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:07:54,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:07:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:07:54,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:07:55,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:07:55,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 23:07:55,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:07:55,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-26 23:07:55,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:07:55,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:07:55,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:07:55,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 23:07:55,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:07:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 23:07:55,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553687821] [2020-10-26 23:07:55,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 23:07:55,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 23:07:55,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308943823] [2020-10-26 23:07:55,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:07:55,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:07:55,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:07:55,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:07:55,190 INFO L87 Difference]: Start difference. First operand 3698 states and 5278 transitions. Second operand 7 states. [2020-10-26 23:08:12,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:08:12,841 INFO L93 Difference]: Finished difference Result 10942 states and 15827 transitions. [2020-10-26 23:08:12,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 23:08:12,842 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 153 [2020-10-26 23:08:12,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:08:12,880 INFO L225 Difference]: With dead ends: 10942 [2020-10-26 23:08:12,881 INFO L226 Difference]: Without dead ends: 7250 [2020-10-26 23:08:12,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:08:12,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7250 states. [2020-10-26 23:08:13,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7250 to 7109. [2020-10-26 23:08:13,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7109 states. [2020-10-26 23:08:13,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7109 states to 7109 states and 9172 transitions. [2020-10-26 23:08:13,117 INFO L78 Accepts]: Start accepts. Automaton has 7109 states and 9172 transitions. Word has length 153 [2020-10-26 23:08:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:08:13,117 INFO L481 AbstractCegarLoop]: Abstraction has 7109 states and 9172 transitions. [2020-10-26 23:08:13,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:08:13,118 INFO L276 IsEmpty]: Start isEmpty. Operand 7109 states and 9172 transitions. [2020-10-26 23:08:13,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-10-26 23:08:13,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:08:13,124 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:08:13,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 23:08:13,125 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:08:13,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:08:13,125 INFO L82 PathProgramCache]: Analyzing trace with hash -2112243674, now seen corresponding path program 1 times [2020-10-26 23:08:13,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:08:13,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333140982] [2020-10-26 23:08:13,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:08:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:13,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:13,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:13,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:18,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:18,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 262 [2020-10-26 23:08:18,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 23:08:18,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-26 23:08:18,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:18,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 23:08:18,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:08:18,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-26 23:08:18,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:08:18,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:08:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:18,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:18,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:18,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:08:18,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:18,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 23:08:18,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:18,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:08:18,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:08:18,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:08:18,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:08:18,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:08:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:18,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:18,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:18,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:08:18,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:18,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-26 23:08:18,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:18,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:08:18,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:08:18,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:08:18,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:08:18,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-26 23:08:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:18,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:18,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:18,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 23:08:18,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:18,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-26 23:08:18,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:18,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:08:18,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-26 23:08:18,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:08:18,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:08:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 80 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 23:08:19,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333140982] [2020-10-26 23:08:19,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:08:19,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:08:19,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860675235] [2020-10-26 23:08:19,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:08:19,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:08:19,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:08:19,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:08:19,089 INFO L87 Difference]: Start difference. First operand 7109 states and 9172 transitions. Second operand 7 states. [2020-10-26 23:08:41,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:08:41,299 INFO L93 Difference]: Finished difference Result 13571 states and 17769 transitions. [2020-10-26 23:08:41,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 23:08:41,303 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 248 [2020-10-26 23:08:41,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:08:41,343 INFO L225 Difference]: With dead ends: 13571 [2020-10-26 23:08:41,343 INFO L226 Difference]: Without dead ends: 7271 [2020-10-26 23:08:41,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 23:08:41,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7271 states. [2020-10-26 23:08:41,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7271 to 7171. [2020-10-26 23:08:41,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7171 states. [2020-10-26 23:08:41,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7171 states to 7171 states and 9265 transitions. [2020-10-26 23:08:41,568 INFO L78 Accepts]: Start accepts. Automaton has 7171 states and 9265 transitions. Word has length 248 [2020-10-26 23:08:41,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:08:41,570 INFO L481 AbstractCegarLoop]: Abstraction has 7171 states and 9265 transitions. [2020-10-26 23:08:41,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:08:41,570 INFO L276 IsEmpty]: Start isEmpty. Operand 7171 states and 9265 transitions. [2020-10-26 23:08:41,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-26 23:08:41,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:08:41,575 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:08:41,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 23:08:41,576 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:08:41,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:08:41,576 INFO L82 PathProgramCache]: Analyzing trace with hash 301010242, now seen corresponding path program 1 times [2020-10-26 23:08:41,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:08:41,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678429671] [2020-10-26 23:08:41,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:08:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:41,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:41,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:41,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:43,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:44,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:44,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-26 23:08:44,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:08:44,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3034 [2020-10-26 23:08:44,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:44,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:08:44,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:08:44,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-10-26 23:08:44,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:08:44,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:08:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:44,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:44,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:44,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:08:44,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:44,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 23:08:44,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:44,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:08:44,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:08:44,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:08:44,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:08:44,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:08:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:44,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:44,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:45,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:45,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:08:45,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:08:45,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 376 [2020-10-26 23:08:45,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:45,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:08:45,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:08:45,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:08:45,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:08:45,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:08:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:08:45,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:08:45,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:08:45,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 23:08:45,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:08:45,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-26 23:08:45,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:08:45,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:08:45,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:08:45,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 23:08:45,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:08:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-26 23:08:45,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678429671] [2020-10-26 23:08:45,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:08:45,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 23:08:45,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990951287] [2020-10-26 23:08:45,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:08:45,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:08:45,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:08:45,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:08:45,641 INFO L87 Difference]: Start difference. First operand 7171 states and 9265 transitions. Second operand 7 states. [2020-10-26 23:09:09,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:09:09,423 INFO L93 Difference]: Finished difference Result 18935 states and 25832 transitions. [2020-10-26 23:09:09,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:09:09,425 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 253 [2020-10-26 23:09:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:09:09,499 INFO L225 Difference]: With dead ends: 18935 [2020-10-26 23:09:09,500 INFO L226 Difference]: Without dead ends: 12573 [2020-10-26 23:09:09,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:09:09,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12573 states. [2020-10-26 23:09:09,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12573 to 12411. [2020-10-26 23:09:09,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12411 states. [2020-10-26 23:09:09,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12411 states to 12411 states and 15620 transitions. [2020-10-26 23:09:09,851 INFO L78 Accepts]: Start accepts. Automaton has 12411 states and 15620 transitions. Word has length 253 [2020-10-26 23:09:09,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:09:09,852 INFO L481 AbstractCegarLoop]: Abstraction has 12411 states and 15620 transitions. [2020-10-26 23:09:09,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:09:09,852 INFO L276 IsEmpty]: Start isEmpty. Operand 12411 states and 15620 transitions. [2020-10-26 23:09:09,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-26 23:09:09,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:09:09,860 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:09:09,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 23:09:09,860 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:09:09,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:09:09,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1684308515, now seen corresponding path program 1 times [2020-10-26 23:09:09,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:09:09,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921682817] [2020-10-26 23:09:09,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:09:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:09,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:10,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:10,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:10,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-26 23:09:10,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:09:10,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 990 [2020-10-26 23:09:10,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:10,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:09:10,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-26 23:09:10,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 23:09:10,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:11,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:09:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:11,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:11,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:11,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:09:11,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:11,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 23:09:11,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:11,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 23:09:11,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:09:11,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 23:09:11,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:11,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:09:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:11,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:11,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:11,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 23:09:11,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:11,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-26 23:09:11,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:11,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:09:11,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:09:11,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 23:09:11,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:11,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-26 23:09:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:11,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:11,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:11,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 23:09:11,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:11,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-26 23:09:11,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:11,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:09:11,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:09:11,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-26 23:09:11,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 177 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 23:09:11,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921682817] [2020-10-26 23:09:11,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:09:11,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 23:09:11,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397027634] [2020-10-26 23:09:11,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 23:09:11,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:09:11,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 23:09:11,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 23:09:11,746 INFO L87 Difference]: Start difference. First operand 12411 states and 15620 transitions. Second operand 7 states. [2020-10-26 23:09:38,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 23:09:38,205 INFO L93 Difference]: Finished difference Result 30494 states and 40504 transitions. [2020-10-26 23:09:38,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 23:09:38,212 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 255 [2020-10-26 23:09:38,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 23:09:38,282 INFO L225 Difference]: With dead ends: 30494 [2020-10-26 23:09:38,282 INFO L226 Difference]: Without dead ends: 18892 [2020-10-26 23:09:38,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:09:38,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18892 states. [2020-10-26 23:09:38,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18892 to 18638. [2020-10-26 23:09:38,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18638 states. [2020-10-26 23:09:38,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18638 states to 18638 states and 23788 transitions. [2020-10-26 23:09:38,808 INFO L78 Accepts]: Start accepts. Automaton has 18638 states and 23788 transitions. Word has length 255 [2020-10-26 23:09:38,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 23:09:38,809 INFO L481 AbstractCegarLoop]: Abstraction has 18638 states and 23788 transitions. [2020-10-26 23:09:38,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 23:09:38,810 INFO L276 IsEmpty]: Start isEmpty. Operand 18638 states and 23788 transitions. [2020-10-26 23:09:38,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-26 23:09:38,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 23:09:38,815 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 23:09:38,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 23:09:38,816 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 23:09:38,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 23:09:38,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1876574351, now seen corresponding path program 1 times [2020-10-26 23:09:38,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 23:09:38,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207560477] [2020-10-26 23:09:38,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 23:09:38,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:38,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:39,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:39,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:40,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:41,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:41,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 284 [2020-10-26 23:09:41,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 23:09:41,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2426 [2020-10-26 23:09:41,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:41,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 23:09:41,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 23:09:41,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 275 [2020-10-26 23:09:41,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:41,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 23:09:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:41,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:41,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:41,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 23:09:41,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 23:09:41,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 23:09:41,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:41,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 23:09:41,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 23:09:41,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 23:09:41,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:41,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 23:09:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:41,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:41,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:42,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:42,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-26 23:09:42,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:09:42,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-26 23:09:42,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:42,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 23:09:42,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:09:42,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-26 23:09:42,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 23:09:42,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-10-26 23:09:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 23:09:42,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:42,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 23:09:42,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 23:09:42,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 23:09:42,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 23:09:42,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-26 23:09:42,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 23:09:42,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 23:09:42,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 23:09:42,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-26 23:09:42,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 23:09:43,009 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-10-26 23:09:43,310 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-10-26 23:09:43,652 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-26 23:09:43,915 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-10-26 23:09:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 4 proven. 165 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 23:09:44,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207560477] [2020-10-26 23:09:44,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 23:09:44,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 23:09:44,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431537828] [2020-10-26 23:09:44,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 23:09:44,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 23:09:44,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 23:09:44,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-26 23:09:44,373 INFO L87 Difference]: Start difference. First operand 18638 states and 23788 transitions. Second operand 12 states. [2020-10-26 23:09:44,563 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-26 23:09:45,890 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-10-26 23:09:48,215 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2020-10-26 23:09:48,565 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2020-10-26 23:09:48,895 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2020-10-26 23:09:49,386 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2020-10-26 23:09:50,236 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-10-26 23:09:50,757 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2020-10-26 23:09:51,802 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-26 23:09:52,323 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-10-26 23:09:55,563 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 80 [2020-10-26 23:09:56,016 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2020-10-26 23:10:01,209 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-26 23:10:02,210 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2020-10-26 23:10:06,078 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2020-10-26 23:10:06,552 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2020-10-26 23:10:13,075 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36