/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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 -i ../../../trunk/examples/svcomp/array-fpi/brs4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:08:17,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:08:17,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:08:17,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:08:17,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:08:17,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:08:17,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:08:17,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:08:17,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:08:17,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:08:17,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:08:17,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:08:17,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:08:17,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:08:17,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:08:17,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:08:17,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:08:17,210 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:08:17,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:08:17,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:08:17,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:08:17,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:08:17,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:08:17,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:08:17,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:08:17,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:08:17,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:08:17,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:08:17,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:08:17,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:08:17,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:08:17,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:08:17,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:08:17,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:08:17,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:08:17,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:08:17,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:08:17,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:08:17,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:08:17,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:08:17,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:08:17,260 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 [2020-10-14 18:08:17,298 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:08:17,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:08:17,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:08:17,300 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:08:17,301 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:08:17,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:08:17,301 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:08:17,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:08:17,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:08:17,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:08:17,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:08:17,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:08:17,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:08:17,304 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:08:17,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:08:17,304 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:08:17,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:08:17,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:08:17,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:08:17,305 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:08:17,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:08:17,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:08:17,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:08:17,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:08:17,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:08:17,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:08:17,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:08:17,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:08:17,306 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:08:17,306 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 18:08:17,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:08:17,653 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:08:17,657 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:08:17,659 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:08:17,659 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:08:17,660 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs4.c [2020-10-14 18:08:17,719 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b92f90e8/5365cb3ea4e64c8abf6c01525dec4d9a/FLAG73364288c [2020-10-14 18:08:18,175 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:08:18,176 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs4.c [2020-10-14 18:08:18,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b92f90e8/5365cb3ea4e64c8abf6c01525dec4d9a/FLAG73364288c [2020-10-14 18:08:18,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6b92f90e8/5365cb3ea4e64c8abf6c01525dec4d9a [2020-10-14 18:08:18,551 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:08:18,553 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:08:18,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:08:18,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:08:18,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:08:18,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:08:18" (1/1) ... [2020-10-14 18:08:18,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b337bef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:18, skipping insertion in model container [2020-10-14 18:08:18,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:08:18" (1/1) ... [2020-10-14 18:08:18,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:08:18,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:08:18,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:08:18,801 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:08:18,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:08:18,934 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:08:18,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:18 WrapperNode [2020-10-14 18:08:18,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:08:18,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:08:18,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:08:18,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:08:18,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:18" (1/1) ... [2020-10-14 18:08:18,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:18" (1/1) ... [2020-10-14 18:08:18,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:18" (1/1) ... [2020-10-14 18:08:18,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:18" (1/1) ... [2020-10-14 18:08:18,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:18" (1/1) ... [2020-10-14 18:08:19,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:18" (1/1) ... [2020-10-14 18:08:19,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:18" (1/1) ... [2020-10-14 18:08:19,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:08:19,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:08:19,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:08:19,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:08:19,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:18" (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 [2020-10-14 18:08:19,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:08:19,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:08:19,093 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 18:08:19,093 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:08:19,093 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:08:19,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:08:19,093 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 18:08:19,094 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 18:08:19,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:08:19,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 18:08:19,095 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 18:08:19,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:08:19,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 18:08:19,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 18:08:19,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 18:08:19,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 18:08:19,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:08:19,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:08:19,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:08:19,386 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:08:19,386 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 18:08:19,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:08:19 BoogieIcfgContainer [2020-10-14 18:08:19,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:08:19,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:08:19,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:08:19,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:08:19,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:08:18" (1/3) ... [2020-10-14 18:08:19,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4a2439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:08:19, skipping insertion in model container [2020-10-14 18:08:19,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:18" (2/3) ... [2020-10-14 18:08:19,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4a2439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:08:19, skipping insertion in model container [2020-10-14 18:08:19,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:08:19" (3/3) ... [2020-10-14 18:08:19,401 INFO L109 eAbstractionObserver]: Analyzing ICFG brs4.c [2020-10-14 18:08:19,416 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:08:19,423 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:08:19,453 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:08:19,495 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:08:19,495 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:08:19,495 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:08:19,496 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:08:19,496 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:08:19,496 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:08:19,496 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:08:19,497 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:08:19,525 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-14 18:08:19,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 18:08:19,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:19,538 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] [2020-10-14 18:08:19,539 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:19,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:19,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-10-14 18:08:19,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:19,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463292224] [2020-10-14 18:08:19,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:19,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:19,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:19,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:20,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:20,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 18:08:20,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:08:20,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-14 18:08:20,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:20,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:20,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:08:20,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:20,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 18:08:20,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 18:08:20,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:20,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:20,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:20,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:20,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:20,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:08:20,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:20,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:20,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:20,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:20,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:20,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:20,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:20,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:20,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:20,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:20,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:20,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:20,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:08:20,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 18:08:20,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:20,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:20,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:20,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:20,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:20,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:08:20,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463292224] [2020-10-14 18:08:20,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:08:20,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 18:08:20,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882219494] [2020-10-14 18:08:20,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 18:08:20,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:20,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 18:08:20,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:08:20,211 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-10-14 18:08:20,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:20,415 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2020-10-14 18:08:20,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 18:08:20,417 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-14 18:08:20,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:20,428 INFO L225 Difference]: With dead ends: 62 [2020-10-14 18:08:20,428 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 18:08:20,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:08:20,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 18:08:20,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-14 18:08:20,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 18:08:20,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-14 18:08:20,481 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 21 [2020-10-14 18:08:20,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:20,482 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-14 18:08:20,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 18:08:20,482 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-14 18:08:20,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 18:08:20,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:20,484 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] [2020-10-14 18:08:20,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:08:20,484 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:20,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:20,485 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-10-14 18:08:20,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:20,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053509730] [2020-10-14 18:08:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:20,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:20,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:20,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:21,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 18:08:21,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:08:21,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 581 [2020-10-14 18:08:21,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:21,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:21,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:08:21,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:21,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:08:21,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:21,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:21,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:21,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:21,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:21,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:08:21,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:21,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:21,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:21,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:21,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:21,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:21,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:21,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:21,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:21,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:21,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:08:21,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:21,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:21,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:21,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:21,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:21,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:08:21,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053509730] [2020-10-14 18:08:21,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:08:21,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-14 18:08:21,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025598305] [2020-10-14 18:08:21,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:08:21,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:21,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:08:21,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:08:21,201 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 8 states. [2020-10-14 18:08:21,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:21,410 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-10-14 18:08:21,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:08:21,411 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-14 18:08:21,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:21,412 INFO L225 Difference]: With dead ends: 37 [2020-10-14 18:08:21,412 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 18:08:21,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:08:21,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 18:08:21,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-14 18:08:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 18:08:21,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-14 18:08:21,421 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 27 [2020-10-14 18:08:21,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:21,422 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-14 18:08:21,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:08:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-14 18:08:21,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 18:08:21,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:21,424 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] [2020-10-14 18:08:21,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:08:21,424 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:21,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:21,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1205224842, now seen corresponding path program 1 times [2020-10-14 18:08:21,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:21,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526578951] [2020-10-14 18:08:21,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:21,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:21,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 18:08:21,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:08:21,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 362 [2020-10-14 18:08:21,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:21,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:21,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:08:21,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:21,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 18:08:21,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:21,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:21,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:21,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:21,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:21,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:08:21,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:21,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:21,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:21,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:21,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:21,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:21,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:21,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:21,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:21,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:21,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:08:21,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:21,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:21,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:21,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:21,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:21,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:08:21,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526578951] [2020-10-14 18:08:21,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:21,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:08:21,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985968883] [2020-10-14 18:08:21,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:08:21,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:21,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:08:21,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:08:21,953 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 10 states. [2020-10-14 18:08:22,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:22,213 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2020-10-14 18:08:22,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:08:22,214 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-14 18:08:22,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:22,215 INFO L225 Difference]: With dead ends: 61 [2020-10-14 18:08:22,215 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 18:08:22,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:08:22,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 18:08:22,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-10-14 18:08:22,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 18:08:22,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-14 18:08:22,224 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2020-10-14 18:08:22,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:22,224 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-14 18:08:22,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:08:22,224 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-14 18:08:22,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 18:08:22,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:22,226 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:22,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:08:22,226 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:22,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:22,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-10-14 18:08:22,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:22,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090166940] [2020-10-14 18:08:22,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:22,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:22,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:22,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:22,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:22,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:23,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:23,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:23,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:23,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:23,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:23,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:24,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:24,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:24,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:24,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:25,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:25,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:25,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:25,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:26,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:26,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:26,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:26,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 18:08:26,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-14 18:08:26,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3973 [2020-10-14 18:08:26,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:26,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:26,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:08:26,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:26,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 18:08:26,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:26,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:26,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:26,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:26,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:26,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:26,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:08:26,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:26,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:26,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:26,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:26,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:26,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:26,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:26,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:26,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:26,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:26,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:26,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:08:26,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:26,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:26,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:26,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:26,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:26,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:08:26,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090166940] [2020-10-14 18:08:26,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:26,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:08:26,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532168903] [2020-10-14 18:08:26,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:08:26,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:26,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:08:26,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:08:26,545 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 13 states. [2020-10-14 18:08:27,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:27,153 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2020-10-14 18:08:27,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:08:27,154 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-14 18:08:27,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:27,155 INFO L225 Difference]: With dead ends: 68 [2020-10-14 18:08:27,155 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 18:08:27,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:08:27,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 18:08:27,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-14 18:08:27,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 18:08:27,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-14 18:08:27,163 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 33 [2020-10-14 18:08:27,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:27,164 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-14 18:08:27,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:08:27,164 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-14 18:08:27,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 18:08:27,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:27,165 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-14 18:08:27,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:08:27,166 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:27,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:27,166 INFO L82 PathProgramCache]: Analyzing trace with hash -2145280396, now seen corresponding path program 2 times [2020-10-14 18:08:27,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:27,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563266922] [2020-10-14 18:08:27,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:27,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:27,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:27,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:27,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:27,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:28,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:28,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:28,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:28,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:28,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:29,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:30,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:31,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:31,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:32,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:32,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:32,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:32,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 18:08:32,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 18:08:32,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 18:08:32,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:32,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:32,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:08:32,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:32,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 18:08:32,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 18:08:32,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:32,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:32,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:32,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:32,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:32,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:08:32,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:32,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:32,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:32,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:32,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:32,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:32,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:32,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:32,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:32,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:32,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:32,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:08:32,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:32,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:32,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:32,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:32,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:32,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:08:32,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563266922] [2020-10-14 18:08:32,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:32,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:08:32,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848848074] [2020-10-14 18:08:32,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:08:32,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:32,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:08:32,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:08:32,433 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 13 states. [2020-10-14 18:08:33,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:33,018 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-10-14 18:08:33,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:08:33,019 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-14 18:08:33,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:33,020 INFO L225 Difference]: With dead ends: 65 [2020-10-14 18:08:33,020 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 18:08:33,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:08:33,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 18:08:33,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-10-14 18:08:33,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 18:08:33,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-14 18:08:33,033 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 36 [2020-10-14 18:08:33,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:33,033 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-14 18:08:33,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:08:33,033 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-14 18:08:33,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 18:08:33,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:33,036 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-14 18:08:33,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:08:33,036 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:33,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:33,037 INFO L82 PathProgramCache]: Analyzing trace with hash 925984472, now seen corresponding path program 3 times [2020-10-14 18:08:33,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:33,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121559867] [2020-10-14 18:08:33,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:33,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:33,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:33,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:33,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:33,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:33,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:33,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:34,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:35,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:35,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:35,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:35,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:35,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:35,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:37,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:37,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:37,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:37,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:37,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:37,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:38,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:38,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 18:08:38,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-14 18:08:38,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 18:08:38,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:38,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:38,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:08:38,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:38,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:08:38,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:38,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:38,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:38,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:38,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:38,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:38,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:38,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:38,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:38,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:38,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:38,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:38,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:38,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:38,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:38,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:38,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:38,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:38,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:08:38,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:38,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:38,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:38,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:38,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:38,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:08:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:08:38,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121559867] [2020-10-14 18:08:38,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:38,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:08:38,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968821051] [2020-10-14 18:08:38,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:08:38,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:38,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:08:38,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:08:38,428 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 17 states. [2020-10-14 18:08:39,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:39,132 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-10-14 18:08:39,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:08:39,133 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-14 18:08:39,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:39,134 INFO L225 Difference]: With dead ends: 76 [2020-10-14 18:08:39,134 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 18:08:39,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:08:39,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 18:08:39,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-14 18:08:39,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 18:08:39,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-14 18:08:39,147 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 39 [2020-10-14 18:08:39,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:39,148 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-14 18:08:39,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:08:39,148 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-14 18:08:39,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 18:08:39,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:39,149 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:39,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:08:39,150 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:39,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:39,151 INFO L82 PathProgramCache]: Analyzing trace with hash 295677591, now seen corresponding path program 4 times [2020-10-14 18:08:39,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:39,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969379041] [2020-10-14 18:08:39,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:39,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:39,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:39,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:39,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:39,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:39,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:39,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:39,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:39,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:40,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:40,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:40,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:41,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:42,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:42,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:43,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:44,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:44,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 18:08:44,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 18:08:44,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:08:44,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:44,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:44,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:08:44,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:44,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 18:08:44,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:44,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:44,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:44,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:44,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:44,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:44,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 18:08:44,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:44,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:44,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:44,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:44,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:44,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:44,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:44,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:44,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:44,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:44,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:44,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:08:44,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:44,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:44,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:44,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:44,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:44,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:08:44,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969379041] [2020-10-14 18:08:44,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:44,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:08:44,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949210228] [2020-10-14 18:08:44,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:08:44,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:44,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:08:44,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:08:44,449 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 16 states. [2020-10-14 18:08:45,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:45,218 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2020-10-14 18:08:45,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 18:08:45,219 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-14 18:08:45,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:45,220 INFO L225 Difference]: With dead ends: 78 [2020-10-14 18:08:45,220 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 18:08:45,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=296, Invalid=894, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:08:45,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 18:08:45,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-14 18:08:45,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 18:08:45,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-14 18:08:45,228 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 42 [2020-10-14 18:08:45,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:45,229 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-14 18:08:45,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:08:45,229 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-14 18:08:45,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 18:08:45,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:45,230 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-10-14 18:08:45,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:08:45,231 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:45,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:45,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1985438725, now seen corresponding path program 5 times [2020-10-14 18:08:45,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:45,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334062360] [2020-10-14 18:08:45,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:45,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:45,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:45,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:45,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:45,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:45,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:46,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:46,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:46,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:48,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:48,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:49,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:49,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:49,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:50,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:50,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:50,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 18:08:50,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 18:08:50,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5159 [2020-10-14 18:08:50,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:50,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:50,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:08:50,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:08:50,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:08:50,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:51,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:51,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:51,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:51,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:51,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:51,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:51,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:51,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:51,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:51,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:51,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:51,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:51,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:51,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:51,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:51,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:51,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:51,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:51,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:51,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:51,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:51,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:51,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:51,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:51,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:08:51,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334062360] [2020-10-14 18:08:51,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:51,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:08:51,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261880908] [2020-10-14 18:08:51,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:08:51,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:51,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:08:51,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:08:51,293 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 21 states. [2020-10-14 18:08:52,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:52,556 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2020-10-14 18:08:52,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:08:52,556 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2020-10-14 18:08:52,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:52,558 INFO L225 Difference]: With dead ends: 88 [2020-10-14 18:08:52,558 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 18:08:52,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:08:52,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 18:08:52,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-14 18:08:52,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 18:08:52,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-10-14 18:08:52,566 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 45 [2020-10-14 18:08:52,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:52,566 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-10-14 18:08:52,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:08:52,566 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-10-14 18:08:52,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 18:08:52,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:52,567 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:52,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:08:52,568 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:52,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:52,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1343208812, now seen corresponding path program 6 times [2020-10-14 18:08:52,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:52,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275117472] [2020-10-14 18:08:52,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:52,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:52,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:52,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:52,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:52,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:52,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:53,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:53,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:53,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:57,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:57,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 18:08:57,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 18:08:57,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:08:57,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:57,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:57,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:08:57,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:57,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 18:08:57,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:57,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:57,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:57,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:57,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:57,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:57,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:57,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:57,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:57,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:57,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:57,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:57,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:57,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:57,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:57,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:57,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:57,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:57,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:08:57,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:57,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:57,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:57,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:57,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:57,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:08:57,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275117472] [2020-10-14 18:08:57,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:57,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:08:57,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801878128] [2020-10-14 18:08:57,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:08:57,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:57,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:08:57,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:08:57,899 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 19 states. [2020-10-14 18:08:58,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:58,785 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2020-10-14 18:08:58,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:08:58,786 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-14 18:08:58,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:58,789 INFO L225 Difference]: With dead ends: 79 [2020-10-14 18:08:58,790 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 18:08:58,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=344, Invalid=1138, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:08:58,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 18:08:58,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-14 18:08:58,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 18:08:58,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-14 18:08:58,798 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 48 [2020-10-14 18:08:58,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:58,798 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-14 18:08:58,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:08:58,799 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-14 18:08:58,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 18:08:58,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:58,800 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:58,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:08:58,800 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:58,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:58,800 INFO L82 PathProgramCache]: Analyzing trace with hash -933102858, now seen corresponding path program 7 times [2020-10-14 18:08:58,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:58,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342983407] [2020-10-14 18:08:58,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:58,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:58,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:00,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:00,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:02,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:02,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:02,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:03,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:03,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 18:09:03,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 18:09:03,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:09:03,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:03,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:03,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 18:09:03,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:09:03,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 18:09:03,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:04,733 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2020-10-14 18:09:04,930 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-10-14 18:09:05,111 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-14 18:09:05,400 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-14 18:09:06,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:06,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:06,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:06,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:06,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:06,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:09:06,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:06,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:06,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:06,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:06,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:06,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:06,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:06,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:06,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:06,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:06,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:06,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:06,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:06,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:06,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:09:06,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:06,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:09:06,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:09:06,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342983407] [2020-10-14 18:09:06,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:06,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 18:09:06,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174163287] [2020-10-14 18:09:06,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 18:09:06,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:06,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 18:09:06,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:09:06,061 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 28 states. [2020-10-14 18:09:06,401 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-10-14 18:09:07,929 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 72 [2020-10-14 18:09:08,286 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 85 [2020-10-14 18:09:08,559 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 78 [2020-10-14 18:09:09,046 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 104 [2020-10-14 18:09:09,557 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 108 [2020-10-14 18:09:09,759 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-14 18:09:09,966 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 58 [2020-10-14 18:09:10,480 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 111 [2020-10-14 18:09:11,043 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 111 [2020-10-14 18:09:11,436 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2020-10-14 18:09:11,926 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 99 [2020-10-14 18:09:12,112 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-14 18:09:12,774 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 119 [2020-10-14 18:09:13,005 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-14 18:09:13,290 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2020-10-14 18:09:13,447 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-14 18:09:14,320 WARN L193 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 107 [2020-10-14 18:09:14,847 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 110 [2020-10-14 18:09:15,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:15,027 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2020-10-14 18:09:15,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 18:09:15,028 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 51 [2020-10-14 18:09:15,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:15,033 INFO L225 Difference]: With dead ends: 94 [2020-10-14 18:09:15,033 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 18:09:15,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=555, Invalid=3605, Unknown=0, NotChecked=0, Total=4160 [2020-10-14 18:09:15,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 18:09:15,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2020-10-14 18:09:15,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 18:09:15,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-10-14 18:09:15,048 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 51 [2020-10-14 18:09:15,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:15,048 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-10-14 18:09:15,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 18:09:15,048 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-10-14 18:09:15,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 18:09:15,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:15,050 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:15,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:09:15,050 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:15,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:15,050 INFO L82 PathProgramCache]: Analyzing trace with hash -171688519, now seen corresponding path program 8 times [2020-10-14 18:09:15,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:15,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863487640] [2020-10-14 18:09:15,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:15,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:18,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:20,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:20,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 18:09:20,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-14 18:09:20,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:09:20,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:20,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:20,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:09:20,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:20,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:09:20,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:20,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:20,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:20,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:20,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:20,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:20,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:09:20,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:20,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:20,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:20,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:20,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:20,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:20,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:20,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:20,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:20,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:20,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:20,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:09:20,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:20,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:20,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:20,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:20,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:20,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:20,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863487640] [2020-10-14 18:09:20,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:20,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:09:20,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781001527] [2020-10-14 18:09:20,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:09:20,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:20,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:09:20,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:09:20,213 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 16 states. [2020-10-14 18:09:20,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:20,607 INFO L93 Difference]: Finished difference Result 154 states and 175 transitions. [2020-10-14 18:09:20,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:09:20,608 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2020-10-14 18:09:20,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:20,609 INFO L225 Difference]: With dead ends: 154 [2020-10-14 18:09:20,609 INFO L226 Difference]: Without dead ends: 115 [2020-10-14 18:09:20,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:09:20,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-14 18:09:20,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2020-10-14 18:09:20,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-14 18:09:20,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2020-10-14 18:09:20,625 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 54 [2020-10-14 18:09:20,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:20,626 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2020-10-14 18:09:20,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:09:20,626 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2020-10-14 18:09:20,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 18:09:20,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:20,627 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:20,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:09:20,628 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:20,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:20,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1646382932, now seen corresponding path program 9 times [2020-10-14 18:09:20,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:20,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387089769] [2020-10-14 18:09:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:20,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:20,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:20,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:20,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:20,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:20,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:20,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:20,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:22,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:22,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:22,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:22,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:22,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:22,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:22,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:25,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:25,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:25,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:25,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:25,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 18:09:25,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 31 [2020-10-14 18:09:25,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5150 [2020-10-14 18:09:25,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:25,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:25,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:09:25,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:25,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 18:09:25,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:25,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:25,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:25,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:25,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:25,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:25,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:25,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:25,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:25,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:25,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:25,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:25,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:25,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:25,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:25,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:25,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:25,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:25,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:25,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:25,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:25,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:25,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:25,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:25,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:25,944 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:25,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387089769] [2020-10-14 18:09:25,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:25,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:09:25,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206821755] [2020-10-14 18:09:25,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:09:25,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:25,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:09:25,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:09:25,946 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand 16 states. [2020-10-14 18:09:26,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:26,514 INFO L93 Difference]: Finished difference Result 131 states and 149 transitions. [2020-10-14 18:09:26,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:09:26,515 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2020-10-14 18:09:26,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:26,516 INFO L225 Difference]: With dead ends: 131 [2020-10-14 18:09:26,516 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 18:09:26,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:09:26,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 18:09:26,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 59. [2020-10-14 18:09:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 18:09:26,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-14 18:09:26,527 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 54 [2020-10-14 18:09:26,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:26,528 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-14 18:09:26,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:09:26,528 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-14 18:09:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 18:09:26,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:26,529 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:26,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:09:26,530 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:26,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:26,530 INFO L82 PathProgramCache]: Analyzing trace with hash -774851751, now seen corresponding path program 10 times [2020-10-14 18:09:26,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:26,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948950065] [2020-10-14 18:09:26,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:26,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:26,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:26,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:27,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:27,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:27,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:27,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:27,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:27,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:27,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:27,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:27,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:27,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:30,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:30,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:31,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:31,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:31,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:31,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 18:09:31,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 18:09:31,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5111 [2020-10-14 18:09:31,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:31,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:31,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 18:09:31,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:09:31,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 18:09:31,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:33,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:33,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:33,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:33,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:33,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:33,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:33,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:33,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:33,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:33,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:33,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:33,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:33,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:33,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:33,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:33,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:33,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:33,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:33,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:09:33,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:33,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:09:33,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:33,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948950065] [2020-10-14 18:09:33,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:33,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 18:09:33,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815305688] [2020-10-14 18:09:33,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 18:09:33,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:33,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 18:09:33,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:09:33,069 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 29 states. [2020-10-14 18:09:35,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:35,438 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2020-10-14 18:09:35,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:09:35,439 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2020-10-14 18:09:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:35,441 INFO L225 Difference]: With dead ends: 103 [2020-10-14 18:09:35,441 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 18:09:35,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=208, Invalid=1598, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 18:09:35,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 18:09:35,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-14 18:09:35,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 18:09:35,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-14 18:09:35,454 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 57 [2020-10-14 18:09:35,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:35,454 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-14 18:09:35,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 18:09:35,455 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-14 18:09:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 18:09:35,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:35,456 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:35,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:09:35,456 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:35,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:35,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1587050890, now seen corresponding path program 11 times [2020-10-14 18:09:35,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:35,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813998744] [2020-10-14 18:09:35,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:35,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:38,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:38,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:39,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:39,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:39,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:40,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:40,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:40,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 18:09:40,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-14 18:09:40,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:09:40,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:40,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:40,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:09:40,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:40,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:09:40,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:40,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:40,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:40,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:40,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:40,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:40,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:40,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:40,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:40,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:40,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:40,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:40,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:40,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:40,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:40,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:40,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:40,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:40,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:09:40,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:40,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:40,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:40,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:40,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:40,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 70 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:40,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813998744] [2020-10-14 18:09:40,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:40,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:09:40,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454419400] [2020-10-14 18:09:40,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:09:40,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:40,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:09:40,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:09:40,662 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 18 states. [2020-10-14 18:09:41,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:41,223 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-10-14 18:09:41,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 18:09:41,224 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 60 [2020-10-14 18:09:41,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:41,225 INFO L225 Difference]: With dead ends: 120 [2020-10-14 18:09:41,225 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 18:09:41,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:09:41,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 18:09:41,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-10-14 18:09:41,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-14 18:09:41,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-10-14 18:09:41,244 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 60 [2020-10-14 18:09:41,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:41,245 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-10-14 18:09:41,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:09:41,245 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-10-14 18:09:41,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 18:09:41,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:41,256 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:41,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:09:41,256 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:41,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:41,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1922218986, now seen corresponding path program 12 times [2020-10-14 18:09:41,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:41,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546001086] [2020-10-14 18:09:41,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:41,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:41,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:41,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:42,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:42,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:42,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:42,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:42,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:43,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:44,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:44,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:45,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:45,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:46,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:46,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 18:09:46,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 18:09:46,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:09:46,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:46,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:46,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 18:09:46,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:46,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:09:46,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:48,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:48,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:48,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:48,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:48,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:48,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:48,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:48,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:48,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:48,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:48,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:48,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:48,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:48,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:48,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:48,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:48,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:48,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:09:48,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:48,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:48,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:48,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:48,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:48,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:48,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546001086] [2020-10-14 18:09:48,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:48,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 18:09:48,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033903078] [2020-10-14 18:09:48,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 18:09:48,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:48,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 18:09:48,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:09:48,798 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 33 states. [2020-10-14 18:09:51,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:51,445 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2020-10-14 18:09:51,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 18:09:51,446 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 63 [2020-10-14 18:09:51,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:51,447 INFO L225 Difference]: With dead ends: 112 [2020-10-14 18:09:51,447 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 18:09:51,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 18:09:51,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 18:09:51,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-10-14 18:09:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-14 18:09:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-14 18:09:51,458 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 63 [2020-10-14 18:09:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:51,459 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-14 18:09:51,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 18:09:51,459 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-14 18:09:51,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 18:09:51,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:51,460 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:51,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:09:51,460 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:51,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:51,460 INFO L82 PathProgramCache]: Analyzing trace with hash 840360089, now seen corresponding path program 13 times [2020-10-14 18:09:51,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:51,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443608505] [2020-10-14 18:09:51,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:51,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:51,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:51,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:51,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:51,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:51,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:51,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:52,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:52,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:52,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:52,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:53,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:53,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:53,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:53,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:53,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:53,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:54,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:54,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:54,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:54,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:54,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:54,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:54,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:56,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:56,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 18:09:56,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-14 18:09:56,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:09:56,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:56,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:56,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:09:56,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:56,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 18:09:56,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:56,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:56,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:56,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:56,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:56,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:56,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:56,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:56,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:56,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:56,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:56,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:56,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:56,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:56,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:56,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:56,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:56,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:56,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:56,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:56,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:56,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:56,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:56,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:56,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 79 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:56,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443608505] [2020-10-14 18:09:56,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:56,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:09:56,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66166663] [2020-10-14 18:09:56,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:09:56,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:56,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:09:56,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:09:56,780 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 20 states. [2020-10-14 18:09:57,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:57,574 INFO L93 Difference]: Finished difference Result 155 states and 163 transitions. [2020-10-14 18:09:57,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 18:09:57,575 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 66 [2020-10-14 18:09:57,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:57,576 INFO L225 Difference]: With dead ends: 155 [2020-10-14 18:09:57,576 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 18:09:57,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=412, Invalid=1310, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:09:57,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 18:09:57,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-10-14 18:09:57,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 18:09:57,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2020-10-14 18:09:57,587 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 66 [2020-10-14 18:09:57,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:57,587 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2020-10-14 18:09:57,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:09:57,587 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2020-10-14 18:09:57,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 18:09:57,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:57,588 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:57,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:09:57,589 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:57,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:57,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1342170681, now seen corresponding path program 14 times [2020-10-14 18:09:57,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:57,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469575015] [2020-10-14 18:09:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:57,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:57,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:58,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:59,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:01,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:01,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:02,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:02,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:02,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 18:10:02,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:10:02,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5083 [2020-10-14 18:10:02,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:02,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:02,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 18:10:02,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 18:10:02,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 18:10:02,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:04,232 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 43 [2020-10-14 18:10:04,437 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 43 [2020-10-14 18:10:04,644 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2020-10-14 18:10:05,542 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 84 [2020-10-14 18:10:06,359 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 99 [2020-10-14 18:10:07,004 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 92 [2020-10-14 18:10:07,818 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 100 [2020-10-14 18:10:08,442 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 87 [2020-10-14 18:10:09,200 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 87 [2020-10-14 18:10:09,859 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 79 [2020-10-14 18:10:10,624 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 90 [2020-10-14 18:10:11,029 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2020-10-14 18:10:11,374 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2020-10-14 18:10:11,659 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2020-10-14 18:10:12,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:10:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:12,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:12,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:12,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:10:12,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:12,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:10:12,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:12,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:12,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:12,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:12,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:12,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:12,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:10:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:12,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:12,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:12,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:10:12,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:12,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:10:12,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:12,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:12,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:12,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:12,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:12,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 45 proven. 137 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:10:12,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469575015] [2020-10-14 18:10:12,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:10:12,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 18:10:12,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750156570] [2020-10-14 18:10:12,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 18:10:12,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:10:12,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 18:10:12,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1452, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:10:12,986 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand 40 states. [2020-10-14 18:10:14,124 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-14 18:10:14,600 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-10-14 18:10:14,991 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-14 18:10:16,943 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-10-14 18:10:19,081 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 335 DAG size of output: 150 [2020-10-14 18:10:19,919 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2020-10-14 18:10:23,113 WARN L193 SmtUtils]: Spent 3.02 s on a formula simplification. DAG size of input: 309 DAG size of output: 273 [2020-10-14 18:10:26,504 WARN L193 SmtUtils]: Spent 3.18 s on a formula simplification. DAG size of input: 304 DAG size of output: 276 [2020-10-14 18:10:27,382 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 107 [2020-10-14 18:10:28,336 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 117 [2020-10-14 18:10:32,072 WARN L193 SmtUtils]: Spent 3.37 s on a formula simplification. DAG size of input: 299 DAG size of output: 275 [2020-10-14 18:10:32,863 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-14 18:10:35,853 WARN L193 SmtUtils]: Spent 2.69 s on a formula simplification. DAG size of input: 283 DAG size of output: 256 [2020-10-14 18:10:39,863 WARN L193 SmtUtils]: Spent 3.82 s on a formula simplification. DAG size of input: 302 DAG size of output: 278 [2020-10-14 18:10:40,409 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-14 18:10:44,021 WARN L193 SmtUtils]: Spent 3.31 s on a formula simplification. DAG size of input: 287 DAG size of output: 260 [2020-10-14 18:10:44,826 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 97 [2020-10-14 18:10:45,783 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 132 [2020-10-14 18:10:49,756 WARN L193 SmtUtils]: Spent 3.62 s on a formula simplification. DAG size of input: 290 DAG size of output: 263 [2020-10-14 18:10:50,144 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-14 18:10:50,518 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-14 18:10:54,308 WARN L193 SmtUtils]: Spent 3.21 s on a formula simplification. DAG size of input: 284 DAG size of output: 257 [2020-10-14 18:10:57,855 WARN L193 SmtUtils]: Spent 3.36 s on a formula simplification. DAG size of input: 286 DAG size of output: 259 [2020-10-14 18:10:58,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:10:58,309 INFO L93 Difference]: Finished difference Result 178 states and 200 transitions. [2020-10-14 18:10:58,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-14 18:10:58,311 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 69 [2020-10-14 18:10:58,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:10:58,312 INFO L225 Difference]: With dead ends: 178 [2020-10-14 18:10:58,312 INFO L226 Difference]: Without dead ends: 139 [2020-10-14 18:10:58,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 50.9s TimeCoverageRelationStatistics Valid=607, Invalid=6199, Unknown=0, NotChecked=0, Total=6806 [2020-10-14 18:10:58,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-14 18:10:58,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 106. [2020-10-14 18:10:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-14 18:10:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2020-10-14 18:10:58,328 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 69 [2020-10-14 18:10:58,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:10:58,328 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2020-10-14 18:10:58,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 18:10:58,329 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2020-10-14 18:10:58,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 18:10:58,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:10:58,330 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:10:58,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 18:10:58,330 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:10:58,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:10:58,330 INFO L82 PathProgramCache]: Analyzing trace with hash -671553642, now seen corresponding path program 15 times [2020-10-14 18:10:58,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:10:58,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952312706] [2020-10-14 18:10:58,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:10:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:58,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:58,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:58,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:58,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:59,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:00,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:00,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:00,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:01,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:02,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:02,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:02,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:02,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:03,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:03,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 18:11:03,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 18:11:03,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 18:11:03,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:03,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:03,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:11:03,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:03,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:11:03,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:03,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:03,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:03,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:03,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:03,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:03,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:03,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:03,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:03,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:03,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:03,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:03,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:03,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:03,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:03,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:03,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:03,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:03,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:11:03,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:03,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:03,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:03,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:03,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:03,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 117 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:11:03,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952312706] [2020-10-14 18:11:03,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:03,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:11:03,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656784825] [2020-10-14 18:11:03,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:11:03,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:03,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:11:03,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:11:03,900 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand 22 states. [2020-10-14 18:11:04,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:04,825 INFO L93 Difference]: Finished difference Result 204 states and 226 transitions. [2020-10-14 18:11:04,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:11:04,827 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2020-10-14 18:11:04,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:04,829 INFO L225 Difference]: With dead ends: 204 [2020-10-14 18:11:04,829 INFO L226 Difference]: Without dead ends: 169 [2020-10-14 18:11:04,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:11:04,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-14 18:11:04,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 137. [2020-10-14 18:11:04,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-14 18:11:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2020-10-14 18:11:04,850 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 72 [2020-10-14 18:11:04,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:04,851 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2020-10-14 18:11:04,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:11:04,851 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2020-10-14 18:11:04,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 18:11:04,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:04,852 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:04,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 18:11:04,854 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:04,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:04,855 INFO L82 PathProgramCache]: Analyzing trace with hash -2050624421, now seen corresponding path program 16 times [2020-10-14 18:11:04,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:04,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749811589] [2020-10-14 18:11:04,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:04,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:04,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:04,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:05,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:05,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:05,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:05,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:06,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:06,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:07,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:07,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:07,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:07,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:07,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:07,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:07,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:07,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:07,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:08,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:08,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:08,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:08,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:08,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:09,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:09,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:09,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:09,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:09,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:09,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 18:11:09,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-14 18:11:09,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 18:11:09,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:09,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:09,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:11:09,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:09,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 18:11:09,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:10,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:10,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:10,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:10,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:10,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:10,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:11:10,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:10,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:10,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:10,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:10,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:10,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:10,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:10,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:10,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:10,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:10,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:10,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:10,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:10,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:10,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:10,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:10,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:10,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 70 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:11:10,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749811589] [2020-10-14 18:11:10,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:10,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:11:10,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150875076] [2020-10-14 18:11:10,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:11:10,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:10,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:11:10,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:11:10,359 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand 22 states. [2020-10-14 18:11:11,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:11,615 INFO L93 Difference]: Finished difference Result 166 states and 186 transitions. [2020-10-14 18:11:11,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 18:11:11,617 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2020-10-14 18:11:11,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:11,619 INFO L225 Difference]: With dead ends: 166 [2020-10-14 18:11:11,619 INFO L226 Difference]: Without dead ends: 134 [2020-10-14 18:11:11,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=340, Invalid=1300, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:11:11,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-14 18:11:11,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 95. [2020-10-14 18:11:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 18:11:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2020-10-14 18:11:11,635 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 72 [2020-10-14 18:11:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:11,635 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2020-10-14 18:11:11,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:11:11,635 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2020-10-14 18:11:11,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 18:11:11,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:11,636 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:11,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 18:11:11,636 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:11,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:11,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1965060556, now seen corresponding path program 17 times [2020-10-14 18:11:11,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:11,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462941125] [2020-10-14 18:11:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:11,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:12,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:12,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:12,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:12,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:12,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:12,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:12,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:12,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:13,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:13,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:13,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:13,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:13,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:14,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:14,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:16,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:16,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 18:11:16,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 18:11:16,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:11:16,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:16,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:16,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 18:11:16,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:16,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 18:11:16,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:16,965 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 15 [2020-10-14 18:11:17,113 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2020-10-14 18:11:18,399 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-14 18:11:18,567 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-14 18:11:19,174 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-14 18:11:19,439 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-14 18:11:19,654 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-14 18:11:19,932 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-14 18:11:20,161 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-14 18:11:20,464 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-10-14 18:11:20,845 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-14 18:11:22,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:22,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:22,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:22,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:22,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:22,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:22,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:22,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:22,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:22,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:22,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:22,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:22,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:22,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:22,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:22,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:22,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:22,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:11:22,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:22,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:22,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:22,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:22,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:22,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:11:22,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462941125] [2020-10-14 18:11:22,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:22,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 18:11:22,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574636606] [2020-10-14 18:11:22,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 18:11:22,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:22,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 18:11:22,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1522, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:11:22,638 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand 41 states. [2020-10-14 18:11:24,954 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-14 18:11:25,913 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-14 18:11:26,311 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2020-10-14 18:11:26,872 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 60 [2020-10-14 18:11:27,369 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2020-10-14 18:11:27,856 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-10-14 18:11:28,324 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-14 18:11:28,709 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-14 18:11:29,034 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-14 18:11:29,518 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-14 18:11:29,931 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-14 18:11:30,392 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-14 18:11:30,802 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-14 18:11:31,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:31,701 INFO L93 Difference]: Finished difference Result 160 states and 185 transitions. [2020-10-14 18:11:31,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 18:11:31,703 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 75 [2020-10-14 18:11:31,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:31,705 INFO L225 Difference]: With dead ends: 160 [2020-10-14 18:11:31,705 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 18:11:31,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=256, Invalid=3166, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 18:11:31,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 18:11:31,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2020-10-14 18:11:31,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-14 18:11:31,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2020-10-14 18:11:31,722 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 75 [2020-10-14 18:11:31,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:31,722 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2020-10-14 18:11:31,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 18:11:31,723 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2020-10-14 18:11:31,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 18:11:31,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:31,724 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:31,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 18:11:31,724 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:31,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:31,724 INFO L82 PathProgramCache]: Analyzing trace with hash 152435131, now seen corresponding path program 18 times [2020-10-14 18:11:31,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:31,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226978558] [2020-10-14 18:11:31,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:31,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:31,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:32,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:32,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:32,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:32,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:32,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:34,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:35,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:35,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:35,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:35,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:36,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:36,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:36,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:36,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:36,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 18:11:36,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 18:11:36,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:11:36,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:36,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:36,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:11:36,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:36,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 18:11:36,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:37,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:37,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:37,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:37,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:37,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:37,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:37,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:37,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:37,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:37,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:37,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:37,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:37,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:37,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:37,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:37,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:37,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:37,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:11:37,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:37,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:37,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:37,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:37,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:37,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 145 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:11:37,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226978558] [2020-10-14 18:11:37,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:37,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 18:11:37,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932180812] [2020-10-14 18:11:37,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 18:11:37,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:37,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 18:11:37,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:11:37,385 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand 24 states. [2020-10-14 18:11:38,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:38,507 INFO L93 Difference]: Finished difference Result 136 states and 146 transitions. [2020-10-14 18:11:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 18:11:38,509 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 78 [2020-10-14 18:11:38,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:38,510 INFO L225 Difference]: With dead ends: 136 [2020-10-14 18:11:38,510 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 18:11:38,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:11:38,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 18:11:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2020-10-14 18:11:38,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-14 18:11:38,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2020-10-14 18:11:38,524 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 78 [2020-10-14 18:11:38,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:38,524 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2020-10-14 18:11:38,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 18:11:38,524 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2020-10-14 18:11:38,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 18:11:38,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:38,525 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:38,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 18:11:38,526 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:38,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:38,526 INFO L82 PathProgramCache]: Analyzing trace with hash 373068695, now seen corresponding path program 19 times [2020-10-14 18:11:38,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:38,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986478937] [2020-10-14 18:11:38,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:38,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:39,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:40,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:40,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:41,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:42,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:42,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:42,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:43,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:43,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:43,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:43,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 18:11:43,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 18:11:43,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-14 18:11:43,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:43,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:43,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 18:11:43,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:43,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 18:11:43,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:44,759 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-14 18:11:45,058 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-14 18:11:45,230 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-14 18:11:45,419 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-14 18:11:45,622 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-14 18:11:45,803 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-14 18:11:46,026 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-14 18:11:46,230 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-14 18:11:46,934 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-14 18:11:47,173 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-14 18:11:47,494 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-14 18:11:48,668 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-14 18:11:50,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:50,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:50,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:50,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:50,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:50,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:50,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:50,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:50,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:50,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:50,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:50,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:50,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:50,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:50,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:50,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:50,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:50,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:11:50,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:50,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:50,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:50,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:50,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:50,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:11:50,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986478937] [2020-10-14 18:11:50,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:50,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-14 18:11:50,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639587184] [2020-10-14 18:11:50,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-14 18:11:50,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:50,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-14 18:11:50,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1854, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 18:11:50,936 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand 45 states. [2020-10-14 18:11:54,230 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-10-14 18:11:54,790 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-14 18:11:55,770 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-10-14 18:11:56,271 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 64 [2020-10-14 18:11:57,012 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 72 [2020-10-14 18:11:57,683 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 66 [2020-10-14 18:11:58,333 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 65 [2020-10-14 18:11:58,791 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2020-10-14 18:11:59,199 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-10-14 18:11:59,817 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2020-10-14 18:12:00,414 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-14 18:12:01,015 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-10-14 18:12:01,468 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-14 18:12:01,879 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-10-14 18:12:03,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:03,215 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2020-10-14 18:12:03,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 18:12:03,218 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 81 [2020-10-14 18:12:03,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:03,220 INFO L225 Difference]: With dead ends: 106 [2020-10-14 18:12:03,220 INFO L226 Difference]: Without dead ends: 100 [2020-10-14 18:12:03,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=283, Invalid=3623, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 18:12:03,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-14 18:12:03,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-10-14 18:12:03,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 18:12:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2020-10-14 18:12:03,238 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 81 [2020-10-14 18:12:03,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:03,238 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2020-10-14 18:12:03,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-14 18:12:03,238 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2020-10-14 18:12:03,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 18:12:03,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:03,239 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:03,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 18:12:03,239 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:03,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:03,239 INFO L82 PathProgramCache]: Analyzing trace with hash -418654856, now seen corresponding path program 20 times [2020-10-14 18:12:03,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:03,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463346163] [2020-10-14 18:12:03,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:03,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:03,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:04,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:04,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:04,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:04,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:04,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:05,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:05,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:05,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:07,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:07,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:07,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:08,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:08,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:08,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 18:12:08,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 18:12:08,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 18:12:08,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:08,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:08,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:12:08,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:12:08,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 18:12:08,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:09,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:12:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:09,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:09,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:09,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:12:09,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:09,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:12:09,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:09,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:09,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:09,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:09,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:09,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:09,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:12:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:09,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:12:09,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:12:09,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:12:09,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:12:09,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:12:09,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:12:09,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:12:09,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:12:09,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:12:09,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:12:09,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:12:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 176 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:12:09,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463346163] [2020-10-14 18:12:09,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:12:09,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 18:12:09,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382728830] [2020-10-14 18:12:09,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 18:12:09,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:12:09,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 18:12:09,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:12:09,030 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand 26 states. [2020-10-14 18:12:10,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:12:10,902 INFO L93 Difference]: Finished difference Result 180 states and 193 transitions. [2020-10-14 18:12:10,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 18:12:10,904 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2020-10-14 18:12:10,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:12:10,906 INFO L225 Difference]: With dead ends: 180 [2020-10-14 18:12:10,906 INFO L226 Difference]: Without dead ends: 107 [2020-10-14 18:12:10,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=508, Invalid=1748, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 18:12:10,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-14 18:12:10,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2020-10-14 18:12:10,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-14 18:12:10,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2020-10-14 18:12:10,922 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 84 [2020-10-14 18:12:10,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:12:10,922 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2020-10-14 18:12:10,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 18:12:10,922 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2020-10-14 18:12:10,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-14 18:12:10,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:12:10,923 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:12:10,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 18:12:10,923 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:12:10,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:12:10,924 INFO L82 PathProgramCache]: Analyzing trace with hash 251042388, now seen corresponding path program 21 times [2020-10-14 18:12:10,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:12:10,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081922778] [2020-10-14 18:12:10,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:12:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:12:10,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking...