/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 08:42:26,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 08:42:26,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 08:42:26,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 08:42:26,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 08:42:26,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 08:42:26,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 08:42:26,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 08:42:26,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 08:42:26,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 08:42:26,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 08:42:26,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 08:42:26,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 08:42:26,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 08:42:26,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 08:42:26,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 08:42:26,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 08:42:26,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 08:42:26,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 08:42:26,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 08:42:26,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 08:42:26,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 08:42:26,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 08:42:26,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 08:42:26,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 08:42:26,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 08:42:26,227 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 08:42:26,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 08:42:26,228 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 08:42:26,229 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 08:42:26,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 08:42:26,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 08:42:26,230 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 08:42:26,231 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 08:42:26,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 08:42:26,232 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 08:42:26,233 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 08:42:26,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 08:42:26,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 08:42:26,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 08:42:26,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 08:42:26,236 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 08:42:26,257 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 08:42:26,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 08:42:26,258 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 08:42:26,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 08:42:26,259 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 08:42:26,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 08:42:26,259 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 08:42:26,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 08:42:26,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 08:42:26,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 08:42:26,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 08:42:26,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 08:42:26,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 08:42:26,260 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 08:42:26,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 08:42:26,261 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 08:42:26,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 08:42:26,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 08:42:26,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 08:42:26,262 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 08:42:26,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 08:42:26,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:42:26,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 08:42:26,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 08:42:26,263 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 08:42:26,263 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 08:42:26,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 08:42:26,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 08:42:26,263 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 08:42:26,264 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 08:42:26,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 08:42:26,582 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 08:42:26,586 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 08:42:26,588 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 08:42:26,588 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 08:42:26,589 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:42:26,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5862fdb66/828867d67dee44c89a56f2b4e7f9b0ee/FLAG46b6fdbe7 [2020-10-14 08:42:27,127 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 08:42:27,127 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:42:27,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5862fdb66/828867d67dee44c89a56f2b4e7f9b0ee/FLAG46b6fdbe7 [2020-10-14 08:42:27,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5862fdb66/828867d67dee44c89a56f2b4e7f9b0ee [2020-10-14 08:42:27,542 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 08:42:27,544 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 08:42:27,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 08:42:27,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 08:42:27,549 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 08:42:27,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:42:27" (1/1) ... [2020-10-14 08:42:27,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a5fe62a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:42:27, skipping insertion in model container [2020-10-14 08:42:27,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:42:27" (1/1) ... [2020-10-14 08:42:27,564 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 08:42:27,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 08:42:27,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:42:27,869 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 08:42:28,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:42:28,045 INFO L208 MainTranslator]: Completed translation [2020-10-14 08:42:28,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:42:28 WrapperNode [2020-10-14 08:42:28,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 08:42:28,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 08:42:28,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 08:42:28,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 08:42:28,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:42:28" (1/1) ... [2020-10-14 08:42:28,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:42:28" (1/1) ... [2020-10-14 08:42:28,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:42:28" (1/1) ... [2020-10-14 08:42:28,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:42:28" (1/1) ... [2020-10-14 08:42:28,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:42:28" (1/1) ... [2020-10-14 08:42:28,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:42:28" (1/1) ... [2020-10-14 08:42:28,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:42:28" (1/1) ... [2020-10-14 08:42:28,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 08:42:28,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 08:42:28,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 08:42:28,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 08:42:28,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:42:28" (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 08:42:28,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 08:42:28,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 08:42:28,227 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 08:42:28,228 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 08:42:28,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 08:42:28,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 08:42:28,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 08:42:28,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-14 08:42:28,229 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 08:42:28,229 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 08:42:28,230 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 08:42:28,230 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 08:42:28,230 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 08:42:28,230 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 08:42:28,230 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 08:42:28,231 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 08:42:28,231 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 08:42:28,232 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 08:42:28,232 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 08:42:28,232 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 08:42:28,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 08:42:28,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 08:42:28,811 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 08:42:28,811 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 08:42:28,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:42:28 BoogieIcfgContainer [2020-10-14 08:42:28,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 08:42:28,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 08:42:28,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 08:42:28,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 08:42:28,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:42:27" (1/3) ... [2020-10-14 08:42:28,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fcb6001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:42:28, skipping insertion in model container [2020-10-14 08:42:28,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:42:28" (2/3) ... [2020-10-14 08:42:28,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fcb6001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:42:28, skipping insertion in model container [2020-10-14 08:42:28,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:42:28" (3/3) ... [2020-10-14 08:42:28,825 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:42:28,836 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 08:42:28,844 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 08:42:28,857 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 08:42:28,884 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 08:42:28,884 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 08:42:28,885 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 08:42:28,885 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 08:42:28,885 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 08:42:28,885 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 08:42:28,886 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 08:42:28,886 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 08:42:28,908 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2020-10-14 08:42:28,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 08:42:28,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:42:28,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:42:28,919 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:42:28,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:42:28,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1223956034, now seen corresponding path program 1 times [2020-10-14 08:42:28,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:42:28,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851255903] [2020-10-14 08:42:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:42:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:42:29,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:29,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:29,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:29,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:30,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:34,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:42:34,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 08:42:34,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 08:42:34,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4856 [2020-10-14 08:42:34,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:42:34,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:42:34,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:42:34,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 08:42:34,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 08:42:34,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 08:42:34,297 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-14 08:42:34,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:42:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:42:34,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:34,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:42:34,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:42:34,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:42:34,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:42:34,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:42:34,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:42:34,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:42:34,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:42:34,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:42:34,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:42:34,335 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 08:42:34,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851255903] [2020-10-14 08:42:34,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:42:34,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:42:34,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675324157] [2020-10-14 08:42:34,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:42:34,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:42:34,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:42:34,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:42:34,362 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 4 states. [2020-10-14 08:42:34,561 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-14 08:42:35,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:42:35,199 INFO L93 Difference]: Finished difference Result 190 states and 299 transitions. [2020-10-14 08:42:35,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:42:35,201 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-14 08:42:35,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:42:35,214 INFO L225 Difference]: With dead ends: 190 [2020-10-14 08:42:35,215 INFO L226 Difference]: Without dead ends: 126 [2020-10-14 08:42:35,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:42:35,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-14 08:42:35,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-10-14 08:42:35,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-14 08:42:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 179 transitions. [2020-10-14 08:42:35,274 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 179 transitions. Word has length 52 [2020-10-14 08:42:35,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:42:35,275 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 179 transitions. [2020-10-14 08:42:35,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:42:35,275 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 179 transitions. [2020-10-14 08:42:35,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 08:42:35,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:42:35,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:42:35,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 08:42:35,278 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:42:35,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:42:35,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1203960358, now seen corresponding path program 1 times [2020-10-14 08:42:35,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:42:35,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408641948] [2020-10-14 08:42:35,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:42:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:42:35,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:35,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:35,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:35,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:35,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:37,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:40,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:42:40,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 08:42:40,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:42:40,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:42:40,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:42:40,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:42:40,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:42:40,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 08:42:40,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 08:42:40,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 08:42:40,555 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-14 08:42:40,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:42:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:42:40,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:40,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:42:40,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:42:40,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:42:40,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:42:40,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:42:40,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:42:40,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:42:40,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:42:40,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:42:40,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:42:40,588 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 08:42:40,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408641948] [2020-10-14 08:42:40,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:42:40,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:42:40,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649661300] [2020-10-14 08:42:40,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:42:40,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:42:40,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:42:40,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:42:40,593 INFO L87 Difference]: Start difference. First operand 124 states and 179 transitions. Second operand 4 states. [2020-10-14 08:42:40,776 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-14 08:42:41,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:42:41,210 INFO L93 Difference]: Finished difference Result 296 states and 451 transitions. [2020-10-14 08:42:41,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:42:41,210 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-14 08:42:41,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:42:41,213 INFO L225 Difference]: With dead ends: 296 [2020-10-14 08:42:41,213 INFO L226 Difference]: Without dead ends: 202 [2020-10-14 08:42:41,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:42:41,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-14 08:42:41,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2020-10-14 08:42:41,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-14 08:42:41,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 299 transitions. [2020-10-14 08:42:41,238 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 299 transitions. Word has length 53 [2020-10-14 08:42:41,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:42:41,239 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 299 transitions. [2020-10-14 08:42:41,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:42:41,239 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 299 transitions. [2020-10-14 08:42:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 08:42:41,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:42:41,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:42:41,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 08:42:41,241 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:42:41,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:42:41,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1222810420, now seen corresponding path program 1 times [2020-10-14 08:42:41,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:42:41,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683246512] [2020-10-14 08:42:41,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:42:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:42:41,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:41,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:41,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:41,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:42,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:45,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:42:45,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 08:42:45,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 08:42:45,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4118 [2020-10-14 08:42:45,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:42:45,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:42:45,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:42:45,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-14 08:42:45,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 08:42:45,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:42:45,586 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-14 08:42:45,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:42:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:42:45,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:45,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:42:45,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:42:45,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:42:45,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:42:45,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:42:45,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:42:45,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:42:45,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:42:45,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:42:45,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:42:45,611 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 08:42:45,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683246512] [2020-10-14 08:42:45,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:42:45,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:42:45,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817245281] [2020-10-14 08:42:45,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:42:45,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:42:45,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:42:45,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:42:45,616 INFO L87 Difference]: Start difference. First operand 200 states and 299 transitions. Second operand 4 states. [2020-10-14 08:42:45,795 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-14 08:42:46,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:42:46,244 INFO L93 Difference]: Finished difference Result 508 states and 785 transitions. [2020-10-14 08:42:46,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:42:46,245 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-14 08:42:46,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:42:46,249 INFO L225 Difference]: With dead ends: 508 [2020-10-14 08:42:46,249 INFO L226 Difference]: Without dead ends: 338 [2020-10-14 08:42:46,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:42:46,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-10-14 08:42:46,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 336. [2020-10-14 08:42:46,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-14 08:42:46,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 511 transitions. [2020-10-14 08:42:46,303 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 511 transitions. Word has length 54 [2020-10-14 08:42:46,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:42:46,305 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 511 transitions. [2020-10-14 08:42:46,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:42:46,305 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 511 transitions. [2020-10-14 08:42:46,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 08:42:46,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:42:46,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:42:46,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 08:42:46,312 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:42:46,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:42:46,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1243428454, now seen corresponding path program 1 times [2020-10-14 08:42:46,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:42:46,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400815135] [2020-10-14 08:42:46,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:42:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:42:46,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:46,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:46,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:46,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:46,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:46,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:46,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:51,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:42:51,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 08:42:51,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:42:51,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 08:42:51,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:42:51,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:42:51,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:42:51,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:42:51,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 08:42:51,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 08:42:51,687 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-14 08:42:51,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:42:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:42:51,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:51,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:42:51,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:42:51,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:42:51,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-14 08:42:51,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:42:51,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:42:51,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:42:51,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:42:51,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:42:51,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:42:51,728 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 08:42:51,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400815135] [2020-10-14 08:42:51,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:42:51,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:42:51,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742233302] [2020-10-14 08:42:51,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:42:51,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:42:51,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:42:51,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:42:51,731 INFO L87 Difference]: Start difference. First operand 336 states and 511 transitions. Second operand 6 states. [2020-10-14 08:42:51,929 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-14 08:42:52,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:42:52,314 INFO L93 Difference]: Finished difference Result 944 states and 1465 transitions. [2020-10-14 08:42:52,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:42:52,314 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-14 08:42:52,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:42:52,321 INFO L225 Difference]: With dead ends: 944 [2020-10-14 08:42:52,321 INFO L226 Difference]: Without dead ends: 638 [2020-10-14 08:42:52,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-14 08:42:52,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-10-14 08:42:52,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 636. [2020-10-14 08:42:52,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2020-10-14 08:42:52,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 979 transitions. [2020-10-14 08:42:52,381 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 979 transitions. Word has length 55 [2020-10-14 08:42:52,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:42:52,381 INFO L479 AbstractCegarLoop]: Abstraction has 636 states and 979 transitions. [2020-10-14 08:42:52,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:42:52,381 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 979 transitions. [2020-10-14 08:42:52,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 08:42:52,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:42:52,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:42:52,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 08:42:52,385 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:42:52,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:42:52,385 INFO L82 PathProgramCache]: Analyzing trace with hash 30439551, now seen corresponding path program 1 times [2020-10-14 08:42:52,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:42:52,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975503741] [2020-10-14 08:42:52,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:42:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:42:52,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:52,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:52,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:52,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:55,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:42:55,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 08:42:55,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:42:55,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2681 [2020-10-14 08:42:55,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:42:55,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:42:55,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 08:42:55,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:42:55,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 08:42:55,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:42:55,330 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-14 08:42:55,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:42:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:42:55,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:55,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:42:55,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:42:55,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:42:55,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 08:42:55,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:42:55,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:42:55,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:42:55,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:42:55,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:42:55,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:42:55,361 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 08:42:55,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975503741] [2020-10-14 08:42:55,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:42:55,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 08:42:55,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951898240] [2020-10-14 08:42:55,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 08:42:55,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:42:55,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 08:42:55,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:42:55,365 INFO L87 Difference]: Start difference. First operand 636 states and 979 transitions. Second operand 7 states. [2020-10-14 08:42:55,552 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-14 08:42:56,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:42:56,272 INFO L93 Difference]: Finished difference Result 5484 states and 8571 transitions. [2020-10-14 08:42:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 08:42:56,272 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-14 08:42:56,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:42:56,297 INFO L225 Difference]: With dead ends: 5484 [2020-10-14 08:42:56,298 INFO L226 Difference]: Without dead ends: 4878 [2020-10-14 08:42:56,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 08:42:56,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4878 states. [2020-10-14 08:42:56,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4878 to 1240. [2020-10-14 08:42:56,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1240 states. [2020-10-14 08:42:56,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1895 transitions. [2020-10-14 08:42:56,436 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1895 transitions. Word has length 55 [2020-10-14 08:42:56,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:42:56,437 INFO L479 AbstractCegarLoop]: Abstraction has 1240 states and 1895 transitions. [2020-10-14 08:42:56,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 08:42:56,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1895 transitions. [2020-10-14 08:42:56,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 08:42:56,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:42:56,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:42:56,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 08:42:56,439 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:42:56,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:42:56,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1705555238, now seen corresponding path program 1 times [2020-10-14 08:42:56,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:42:56,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126721048] [2020-10-14 08:42:56,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:42:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:42:56,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:56,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:56,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:56,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:57,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:57,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:58,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:42:58,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 08:42:58,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:42:58,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2309 [2020-10-14 08:42:58,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:42:58,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:42:58,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:42:58,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 08:42:58,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 08:42:58,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:42:58,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:42:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:42:58,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:58,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:42:58,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:42:58,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:42:58,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:42:58,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:42:58,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:42:58,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:42:58,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:42:58,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:42:58,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:42:58,923 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 08:42:58,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126721048] [2020-10-14 08:42:58,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:42:58,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:42:58,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023434233] [2020-10-14 08:42:58,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:42:58,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:42:58,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:42:58,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:42:58,927 INFO L87 Difference]: Start difference. First operand 1240 states and 1895 transitions. Second operand 4 states. [2020-10-14 08:42:59,056 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-14 08:42:59,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:42:59,524 INFO L93 Difference]: Finished difference Result 3484 states and 5321 transitions. [2020-10-14 08:42:59,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:42:59,524 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-14 08:42:59,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:42:59,542 INFO L225 Difference]: With dead ends: 3484 [2020-10-14 08:42:59,542 INFO L226 Difference]: Without dead ends: 2274 [2020-10-14 08:42:59,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:42:59,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2020-10-14 08:42:59,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 2240. [2020-10-14 08:42:59,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2240 states. [2020-10-14 08:42:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 3343 transitions. [2020-10-14 08:42:59,760 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 3343 transitions. Word has length 57 [2020-10-14 08:42:59,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:42:59,761 INFO L479 AbstractCegarLoop]: Abstraction has 2240 states and 3343 transitions. [2020-10-14 08:42:59,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:42:59,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 3343 transitions. [2020-10-14 08:42:59,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 08:42:59,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:42:59,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:42:59,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 08:42:59,766 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:42:59,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:42:59,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1685505895, now seen corresponding path program 1 times [2020-10-14 08:42:59,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:42:59,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736100772] [2020-10-14 08:42:59,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:42:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:42:59,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:59,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:59,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:42:59,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:02,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:02,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-14 08:43:02,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:43:02,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2489 [2020-10-14 08:43:02,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:02,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:02,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 08:43:02,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:43:02,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 08:43:02,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:43:02,494 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-14 08:43:02,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:43:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:02,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:02,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:02,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:43:02,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:43:02,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:43:02,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:02,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:02,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:43:02,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:43:02,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:43:02,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:43:02,542 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 08:43:02,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736100772] [2020-10-14 08:43:02,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:43:02,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 08:43:02,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704937192] [2020-10-14 08:43:02,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 08:43:02,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:43:02,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 08:43:02,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:43:02,545 INFO L87 Difference]: Start difference. First operand 2240 states and 3343 transitions. Second operand 7 states. [2020-10-14 08:43:02,789 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-14 08:43:04,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:43:04,095 INFO L93 Difference]: Finished difference Result 10088 states and 15151 transitions. [2020-10-14 08:43:04,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 08:43:04,096 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-14 08:43:04,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:43:04,137 INFO L225 Difference]: With dead ends: 10088 [2020-10-14 08:43:04,137 INFO L226 Difference]: Without dead ends: 7878 [2020-10-14 08:43:04,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 08:43:04,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7878 states. [2020-10-14 08:43:04,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7878 to 2240. [2020-10-14 08:43:04,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2240 states. [2020-10-14 08:43:04,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 3311 transitions. [2020-10-14 08:43:04,397 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 3311 transitions. Word has length 57 [2020-10-14 08:43:04,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:43:04,397 INFO L479 AbstractCegarLoop]: Abstraction has 2240 states and 3311 transitions. [2020-10-14 08:43:04,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 08:43:04,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 3311 transitions. [2020-10-14 08:43:04,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 08:43:04,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:43:04,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:43:04,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 08:43:04,399 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:43:04,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:43:04,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1351282199, now seen corresponding path program 1 times [2020-10-14 08:43:04,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:43:04,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74284128] [2020-10-14 08:43:04,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:43:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:04,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:04,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:04,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:04,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:04,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:05,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:05,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 08:43:05,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 08:43:05,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 730 [2020-10-14 08:43:05,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:05,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:05,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:43:05,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 08:43:05,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 08:43:05,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:43:05,288 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-14 08:43:05,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:43:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:05,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:05,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:05,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:43:05,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:43:05,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:43:05,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:05,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:05,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:43:05,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:43:05,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:43:05,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:43:05,314 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 08:43:05,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74284128] [2020-10-14 08:43:05,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:43:05,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:43:05,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898964298] [2020-10-14 08:43:05,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:43:05,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:43:05,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:43:05,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:43:05,317 INFO L87 Difference]: Start difference. First operand 2240 states and 3311 transitions. Second operand 4 states. [2020-10-14 08:43:05,506 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-14 08:43:06,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:43:06,225 INFO L93 Difference]: Finished difference Result 4343 states and 6501 transitions. [2020-10-14 08:43:06,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:43:06,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-14 08:43:06,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:43:06,241 INFO L225 Difference]: With dead ends: 4343 [2020-10-14 08:43:06,241 INFO L226 Difference]: Without dead ends: 3132 [2020-10-14 08:43:06,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:43:06,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2020-10-14 08:43:06,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 3130. [2020-10-14 08:43:06,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3130 states. [2020-10-14 08:43:06,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3130 states to 3130 states and 4617 transitions. [2020-10-14 08:43:06,545 INFO L78 Accepts]: Start accepts. Automaton has 3130 states and 4617 transitions. Word has length 58 [2020-10-14 08:43:06,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:43:06,546 INFO L479 AbstractCegarLoop]: Abstraction has 3130 states and 4617 transitions. [2020-10-14 08:43:06,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:43:06,546 INFO L276 IsEmpty]: Start isEmpty. Operand 3130 states and 4617 transitions. [2020-10-14 08:43:06,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 08:43:06,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:43:06,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:43:06,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 08:43:06,547 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:43:06,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:43:06,548 INFO L82 PathProgramCache]: Analyzing trace with hash -712984576, now seen corresponding path program 1 times [2020-10-14 08:43:06,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:43:06,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168012148] [2020-10-14 08:43:06,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:43:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:06,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:06,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:06,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:06,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:07,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:07,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 08:43:07,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:43:07,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1033 [2020-10-14 08:43:07,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:07,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:07,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:43:07,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:43:07,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 08:43:07,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:43:07,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:43:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:07,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:07,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:07,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:43:07,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:43:07,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 08:43:07,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:07,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:07,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:43:07,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:43:07,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:43:07,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:43:07,759 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 08:43:07,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168012148] [2020-10-14 08:43:07,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:43:07,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:43:07,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86043193] [2020-10-14 08:43:07,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:43:07,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:43:07,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:43:07,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:43:07,762 INFO L87 Difference]: Start difference. First operand 3130 states and 4617 transitions. Second operand 6 states. [2020-10-14 08:43:08,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:43:08,465 INFO L93 Difference]: Finished difference Result 6228 states and 9202 transitions. [2020-10-14 08:43:08,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:43:08,466 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-14 08:43:08,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:43:08,484 INFO L225 Difference]: With dead ends: 6228 [2020-10-14 08:43:08,484 INFO L226 Difference]: Without dead ends: 3130 [2020-10-14 08:43:08,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:43:08,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3130 states. [2020-10-14 08:43:08,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3130 to 3130. [2020-10-14 08:43:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3130 states. [2020-10-14 08:43:08,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3130 states to 3130 states and 4569 transitions. [2020-10-14 08:43:08,771 INFO L78 Accepts]: Start accepts. Automaton has 3130 states and 4569 transitions. Word has length 58 [2020-10-14 08:43:08,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:43:08,771 INFO L479 AbstractCegarLoop]: Abstraction has 3130 states and 4569 transitions. [2020-10-14 08:43:08,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:43:08,772 INFO L276 IsEmpty]: Start isEmpty. Operand 3130 states and 4569 transitions. [2020-10-14 08:43:08,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 08:43:08,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:43:08,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:43:08,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 08:43:08,773 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:43:08,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:43:08,773 INFO L82 PathProgramCache]: Analyzing trace with hash -584899269, now seen corresponding path program 1 times [2020-10-14 08:43:08,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:43:08,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207281685] [2020-10-14 08:43:08,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:43:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:08,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:08,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:09,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:09,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 08:43:09,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 08:43:09,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-14 08:43:09,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:09,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:09,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:43:09,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:43:09,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 08:43:09,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:43:09,225 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-14 08:43:09,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:43:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:09,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:09,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:09,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:43:09,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:43:09,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 08:43:09,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:09,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:09,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:43:09,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:43:09,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:43:09,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:43:09,267 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 08:43:09,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207281685] [2020-10-14 08:43:09,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:43:09,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:43:09,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88455990] [2020-10-14 08:43:09,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:43:09,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:43:09,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:43:09,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:43:09,270 INFO L87 Difference]: Start difference. First operand 3130 states and 4569 transitions. Second operand 6 states. [2020-10-14 08:43:09,445 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-14 08:43:10,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:43:10,197 INFO L93 Difference]: Finished difference Result 8326 states and 12227 transitions. [2020-10-14 08:43:10,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:43:10,198 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-14 08:43:10,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:43:10,238 INFO L225 Difference]: With dead ends: 8326 [2020-10-14 08:43:10,238 INFO L226 Difference]: Without dead ends: 5228 [2020-10-14 08:43:10,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:43:10,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5228 states. [2020-10-14 08:43:10,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5228 to 5226. [2020-10-14 08:43:10,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5226 states. [2020-10-14 08:43:10,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5226 states to 5226 states and 7625 transitions. [2020-10-14 08:43:10,771 INFO L78 Accepts]: Start accepts. Automaton has 5226 states and 7625 transitions. Word has length 58 [2020-10-14 08:43:10,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:43:10,772 INFO L479 AbstractCegarLoop]: Abstraction has 5226 states and 7625 transitions. [2020-10-14 08:43:10,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:43:10,772 INFO L276 IsEmpty]: Start isEmpty. Operand 5226 states and 7625 transitions. [2020-10-14 08:43:10,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 08:43:10,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:43:10,773 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:43:10,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 08:43:10,773 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:43:10,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:43:10,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1347762976, now seen corresponding path program 1 times [2020-10-14 08:43:10,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:43:10,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509964337] [2020-10-14 08:43:10,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:43:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:10,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:10,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:10,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 08:43:10,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:43:10,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-14 08:43:10,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:10,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:10,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:43:10,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-14 08:43:10,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 08:43:10,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:43:11,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:43:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:11,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:11,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:11,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:43:11,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:43:11,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 08:43:11,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:11,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:11,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:43:11,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:43:11,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:43:11,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:43:11,034 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 08:43:11,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509964337] [2020-10-14 08:43:11,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:43:11,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:43:11,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637042331] [2020-10-14 08:43:11,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:43:11,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:43:11,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:43:11,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:43:11,039 INFO L87 Difference]: Start difference. First operand 5226 states and 7625 transitions. Second operand 5 states. [2020-10-14 08:43:12,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:43:12,614 INFO L93 Difference]: Finished difference Result 9935 states and 14436 transitions. [2020-10-14 08:43:12,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:43:12,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2020-10-14 08:43:12,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:43:12,643 INFO L225 Difference]: With dead ends: 9935 [2020-10-14 08:43:12,644 INFO L226 Difference]: Without dead ends: 9933 [2020-10-14 08:43:12,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:43:12,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9933 states. [2020-10-14 08:43:13,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9933 to 5482. [2020-10-14 08:43:13,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5482 states. [2020-10-14 08:43:13,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5482 states to 5482 states and 7865 transitions. [2020-10-14 08:43:13,272 INFO L78 Accepts]: Start accepts. Automaton has 5482 states and 7865 transitions. Word has length 58 [2020-10-14 08:43:13,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:43:13,272 INFO L479 AbstractCegarLoop]: Abstraction has 5482 states and 7865 transitions. [2020-10-14 08:43:13,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:43:13,273 INFO L276 IsEmpty]: Start isEmpty. Operand 5482 states and 7865 transitions. [2020-10-14 08:43:13,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 08:43:13,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:43:13,275 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:43:13,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 08:43:13,276 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:43:13,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:43:13,276 INFO L82 PathProgramCache]: Analyzing trace with hash 419462168, now seen corresponding path program 1 times [2020-10-14 08:43:13,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:43:13,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657439126] [2020-10-14 08:43:13,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:43:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:13,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:13,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:13,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:13,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:13,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:16,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:16,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:16,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:16,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:16,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:16,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:17,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:17,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:17,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:18,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:18,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:18,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:18,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 08:43:18,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 08:43:18,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-14 08:43:18,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:18,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:18,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:43:18,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-14 08:43:18,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 08:43:18,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:43:18,527 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-14 08:43:18,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:43:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:18,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:18,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:18,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:43:18,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:43:18,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:43:18,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:18,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:18,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:43:18,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:43:18,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:43:18,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:43:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:43:18,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657439126] [2020-10-14 08:43:18,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:43:18,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:43:18,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484043543] [2020-10-14 08:43:18,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:43:18,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:43:18,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:43:18,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:43:18,580 INFO L87 Difference]: Start difference. First operand 5482 states and 7865 transitions. Second operand 4 states. [2020-10-14 08:43:19,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:43:19,290 INFO L93 Difference]: Finished difference Result 9966 states and 14369 transitions. [2020-10-14 08:43:19,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:43:19,291 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-14 08:43:19,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:43:19,301 INFO L225 Difference]: With dead ends: 9966 [2020-10-14 08:43:19,302 INFO L226 Difference]: Without dead ends: 4516 [2020-10-14 08:43:19,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:43:19,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4516 states. [2020-10-14 08:43:19,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4516 to 4514. [2020-10-14 08:43:19,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4514 states. [2020-10-14 08:43:19,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4514 states to 4514 states and 6470 transitions. [2020-10-14 08:43:19,825 INFO L78 Accepts]: Start accepts. Automaton has 4514 states and 6470 transitions. Word has length 81 [2020-10-14 08:43:19,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:43:19,825 INFO L479 AbstractCegarLoop]: Abstraction has 4514 states and 6470 transitions. [2020-10-14 08:43:19,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:43:19,825 INFO L276 IsEmpty]: Start isEmpty. Operand 4514 states and 6470 transitions. [2020-10-14 08:43:19,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:43:19,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:43:19,828 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:43:19,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 08:43:19,828 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:43:19,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:43:19,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1579394696, now seen corresponding path program 1 times [2020-10-14 08:43:19,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:43:19,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785719645] [2020-10-14 08:43:19,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:43:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:19,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:19,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:19,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:19,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:20,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:20,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:21,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:22,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:24,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:24,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:43:24,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:43:24,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 08:43:24,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:24,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:24,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 08:43:24,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:43:24,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 08:43:24,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:43:25,024 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-14 08:43:25,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:43:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:25,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:25,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:25,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:43:25,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:43:25,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:43:25,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:25,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:25,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:43:25,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:43:25,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:43:25,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 08:43:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 08:43:25,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785719645] [2020-10-14 08:43:25,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:43:25,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 08:43:25,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348787742] [2020-10-14 08:43:25,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 08:43:25,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:43:25,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 08:43:25,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:43:25,076 INFO L87 Difference]: Start difference. First operand 4514 states and 6470 transitions. Second operand 7 states. [2020-10-14 08:43:25,271 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-14 08:43:27,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:43:27,501 INFO L93 Difference]: Finished difference Result 27840 states and 40045 transitions. [2020-10-14 08:43:27,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 08:43:27,502 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-14 08:43:27,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:43:27,557 INFO L225 Difference]: With dead ends: 27840 [2020-10-14 08:43:27,558 INFO L226 Difference]: Without dead ends: 23390 [2020-10-14 08:43:27,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 08:43:27,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23390 states. [2020-10-14 08:43:28,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23390 to 10802. [2020-10-14 08:43:28,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10802 states. [2020-10-14 08:43:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10802 states to 10802 states and 15398 transitions. [2020-10-14 08:43:28,647 INFO L78 Accepts]: Start accepts. Automaton has 10802 states and 15398 transitions. Word has length 82 [2020-10-14 08:43:28,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:43:28,647 INFO L479 AbstractCegarLoop]: Abstraction has 10802 states and 15398 transitions. [2020-10-14 08:43:28,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 08:43:28,647 INFO L276 IsEmpty]: Start isEmpty. Operand 10802 states and 15398 transitions. [2020-10-14 08:43:28,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:43:28,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:43:28,649 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:43:28,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 08:43:28,649 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:43:28,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:43:28,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1555649474, now seen corresponding path program 1 times [2020-10-14 08:43:28,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:43:28,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468754268] [2020-10-14 08:43:28,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:43:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:28,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:28,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:28,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:28,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:29,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:29,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:29,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:29,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:31,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:32,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:33,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:33,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:43:33,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 08:43:33,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 08:43:33,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:33,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:33,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 08:43:33,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:43:33,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 08:43:33,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:43:33,835 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-14 08:43:33,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:43:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:33,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:33,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:33,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:43:33,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:43:33,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:43:33,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:33,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:33,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:43:33,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:43:33,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:43:33,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:43:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 08:43:33,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468754268] [2020-10-14 08:43:33,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:43:33,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 08:43:33,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549618287] [2020-10-14 08:43:33,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 08:43:33,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:43:33,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 08:43:33,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:43:33,879 INFO L87 Difference]: Start difference. First operand 10802 states and 15398 transitions. Second operand 7 states. [2020-10-14 08:43:36,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:43:36,410 INFO L93 Difference]: Finished difference Result 36728 states and 52309 transitions. [2020-10-14 08:43:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 08:43:36,411 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-14 08:43:36,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:43:36,474 INFO L225 Difference]: With dead ends: 36728 [2020-10-14 08:43:36,474 INFO L226 Difference]: Without dead ends: 30438 [2020-10-14 08:43:36,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 08:43:36,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30438 states. [2020-10-14 08:43:38,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30438 to 17474. [2020-10-14 08:43:38,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17474 states. [2020-10-14 08:43:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17474 states to 17474 states and 24838 transitions. [2020-10-14 08:43:38,117 INFO L78 Accepts]: Start accepts. Automaton has 17474 states and 24838 transitions. Word has length 82 [2020-10-14 08:43:38,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:43:38,118 INFO L479 AbstractCegarLoop]: Abstraction has 17474 states and 24838 transitions. [2020-10-14 08:43:38,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 08:43:38,118 INFO L276 IsEmpty]: Start isEmpty. Operand 17474 states and 24838 transitions. [2020-10-14 08:43:38,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:43:38,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:43:38,120 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:43:38,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 08:43:38,120 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:43:38,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:43:38,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1951920590, now seen corresponding path program 1 times [2020-10-14 08:43:38,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:43:38,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369031683] [2020-10-14 08:43:38,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:43:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:38,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:38,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:38,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:38,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:38,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:38,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:38,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:38,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:39,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:40,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:41,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:41,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:41,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:41,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:42,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:43,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:43,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:43:43,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 08:43:43,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-14 08:43:43,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:43,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:43,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 08:43:43,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:43:43,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 08:43:43,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:43:43,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:43:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:43,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:43,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:43,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:43:43,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:43:43,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:43:43,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:43,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:43,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:43:43,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:43:43,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:43:43,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:43:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 08:43:43,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369031683] [2020-10-14 08:43:43,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:43:43,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 08:43:43,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892037450] [2020-10-14 08:43:43,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 08:43:43,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:43:43,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 08:43:43,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:43:43,384 INFO L87 Difference]: Start difference. First operand 17474 states and 24838 transitions. Second operand 7 states. [2020-10-14 08:43:43,518 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-14 08:43:46,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:43:46,406 INFO L93 Difference]: Finished difference Result 41648 states and 59293 transitions. [2020-10-14 08:43:46,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 08:43:46,406 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-14 08:43:46,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:43:46,453 INFO L225 Difference]: With dead ends: 41648 [2020-10-14 08:43:46,453 INFO L226 Difference]: Without dead ends: 35358 [2020-10-14 08:43:46,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-14 08:43:46,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35358 states. [2020-10-14 08:43:48,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35358 to 21922. [2020-10-14 08:43:48,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21922 states. [2020-10-14 08:43:48,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21922 states to 21922 states and 31174 transitions. [2020-10-14 08:43:48,426 INFO L78 Accepts]: Start accepts. Automaton has 21922 states and 31174 transitions. Word has length 82 [2020-10-14 08:43:48,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:43:48,426 INFO L479 AbstractCegarLoop]: Abstraction has 21922 states and 31174 transitions. [2020-10-14 08:43:48,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 08:43:48,427 INFO L276 IsEmpty]: Start isEmpty. Operand 21922 states and 31174 transitions. [2020-10-14 08:43:48,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 08:43:48,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:43:48,429 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:43:48,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 08:43:48,429 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:43:48,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:43:48,430 INFO L82 PathProgramCache]: Analyzing trace with hash 430688876, now seen corresponding path program 1 times [2020-10-14 08:43:48,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:43:48,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732283530] [2020-10-14 08:43:48,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:43:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:48,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:48,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:48,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:48,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:48,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:48,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:48,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:49,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:49,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:49,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:49,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:49,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:49,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:49,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:50,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:53,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:53,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 08:43:53,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 08:43:53,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:43:53,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:53,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:53,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:43:53,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:43:53,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 08:43:53,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:43:53,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:43:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:53,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:53,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:43:53,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:43:53,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:43:53,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:43:53,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:43:53,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:43:53,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:43:53,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:43:53,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:43:53,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:43:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:43:53,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732283530] [2020-10-14 08:43:53,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:43:53,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 08:43:53,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113070122] [2020-10-14 08:43:53,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:43:53,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:43:53,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:43:53,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:43:53,592 INFO L87 Difference]: Start difference. First operand 21922 states and 31174 transitions. Second operand 6 states. [2020-10-14 08:43:56,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:43:56,493 INFO L93 Difference]: Finished difference Result 38624 states and 55153 transitions. [2020-10-14 08:43:56,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:43:56,494 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-14 08:43:56,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:43:56,533 INFO L225 Difference]: With dead ends: 38624 [2020-10-14 08:43:56,533 INFO L226 Difference]: Without dead ends: 32334 [2020-10-14 08:43:56,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:43:56,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32334 states. [2020-10-14 08:43:59,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32334 to 30818. [2020-10-14 08:43:59,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30818 states. [2020-10-14 08:43:59,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30818 states to 30818 states and 44102 transitions. [2020-10-14 08:43:59,104 INFO L78 Accepts]: Start accepts. Automaton has 30818 states and 44102 transitions. Word has length 82 [2020-10-14 08:43:59,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:43:59,105 INFO L479 AbstractCegarLoop]: Abstraction has 30818 states and 44102 transitions. [2020-10-14 08:43:59,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:43:59,105 INFO L276 IsEmpty]: Start isEmpty. Operand 30818 states and 44102 transitions. [2020-10-14 08:43:59,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-14 08:43:59,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:43:59,107 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:43:59,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 08:43:59,107 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:43:59,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:43:59,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1200786322, now seen corresponding path program 1 times [2020-10-14 08:43:59,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:43:59,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177115692] [2020-10-14 08:43:59,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:43:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:43:59,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:59,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:59,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:59,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:59,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:59,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:59,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:59,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:43:59,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:44:01,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:44:01,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:44:01,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:44:04,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:44:04,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:44:04,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 08:44:04,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 08:44:04,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 08:44:04,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:44:04,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:44:04,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 08:44:04,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:44:04,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-14 08:44:04,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:44:04,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:44:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:44:04,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:44:04,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:44:04,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:44:04,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:44:04,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 08:44:04,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:44:04,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:44:04,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:44:04,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:44:04,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:44:04,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:44:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:44:04,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177115692] [2020-10-14 08:44:04,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:44:04,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 08:44:04,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348688800] [2020-10-14 08:44:04,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 08:44:04,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:44:04,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 08:44:04,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-14 08:44:04,392 INFO L87 Difference]: Start difference. First operand 30818 states and 44102 transitions. Second operand 11 states. [2020-10-14 08:44:04,556 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-14 08:44:17,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:44:17,404 INFO L93 Difference]: Finished difference Result 162055 states and 230020 transitions. [2020-10-14 08:44:17,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 08:44:17,405 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-10-14 08:44:17,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:44:17,590 INFO L225 Difference]: With dead ends: 162055 [2020-10-14 08:44:17,590 INFO L226 Difference]: Without dead ends: 131283 [2020-10-14 08:44:17,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=273, Invalid=719, Unknown=0, NotChecked=0, Total=992 [2020-10-14 08:44:17,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131283 states. [2020-10-14 08:44:26,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131283 to 73923. [2020-10-14 08:44:26,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73923 states. [2020-10-14 08:44:26,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73923 states to 73923 states and 104591 transitions. [2020-10-14 08:44:26,178 INFO L78 Accepts]: Start accepts. Automaton has 73923 states and 104591 transitions. Word has length 83 [2020-10-14 08:44:26,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:44:26,178 INFO L479 AbstractCegarLoop]: Abstraction has 73923 states and 104591 transitions. [2020-10-14 08:44:26,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 08:44:26,178 INFO L276 IsEmpty]: Start isEmpty. Operand 73923 states and 104591 transitions. [2020-10-14 08:44:26,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 08:44:26,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:44:26,184 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:44:26,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 08:44:26,185 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:44:26,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:44:26,185 INFO L82 PathProgramCache]: Analyzing trace with hash -482413527, now seen corresponding path program 1 times [2020-10-14 08:44:26,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:44:26,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841041457] [2020-10-14 08:44:26,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:44:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:44:26,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:44:26,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:44:26,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:44:26,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:44:26,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:44:26,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:44:31,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:44:31,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 08:44:31,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:44:31,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:44:31,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:44:31,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:44:31,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 08:44:31,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:44:31,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-14 08:44:31,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:44:31,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:44:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:44:31,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:44:31,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:44:31,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:44:31,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:44:31,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:44:31,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:44:31,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:44:31,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:44:31,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:44:31,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:44:31,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:44:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:44:31,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841041457] [2020-10-14 08:44:31,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:44:31,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 08:44:31,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930484936] [2020-10-14 08:44:31,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 08:44:31,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:44:31,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 08:44:31,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-14 08:44:31,631 INFO L87 Difference]: Start difference. First operand 73923 states and 104591 transitions. Second operand 10 states. [2020-10-14 08:44:31,789 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-14 08:45:14,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:45:14,522 INFO L93 Difference]: Finished difference Result 390767 states and 548172 transitions. [2020-10-14 08:45:14,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 08:45:14,523 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 84 [2020-10-14 08:45:14,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:45:15,026 INFO L225 Difference]: With dead ends: 390767 [2020-10-14 08:45:15,026 INFO L226 Difference]: Without dead ends: 354277 [2020-10-14 08:45:15,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2020-10-14 08:45:15,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354277 states. [2020-10-14 08:45:40,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354277 to 182899. [2020-10-14 08:45:40,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182899 states. [2020-10-14 08:45:41,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182899 states to 182899 states and 259366 transitions. [2020-10-14 08:45:41,204 INFO L78 Accepts]: Start accepts. Automaton has 182899 states and 259366 transitions. Word has length 84 [2020-10-14 08:45:41,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:45:41,205 INFO L479 AbstractCegarLoop]: Abstraction has 182899 states and 259366 transitions. [2020-10-14 08:45:41,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 08:45:41,205 INFO L276 IsEmpty]: Start isEmpty. Operand 182899 states and 259366 transitions. [2020-10-14 08:45:41,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 08:45:41,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:45:41,213 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:45:41,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 08:45:41,214 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:45:41,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:45:41,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1090504405, now seen corresponding path program 1 times [2020-10-14 08:45:41,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:45:41,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996532062] [2020-10-14 08:45:41,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:45:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:45:41,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:45:41,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:45:41,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:45:41,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:45:41,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:45:41,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:45:42,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:45:42,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:45:42,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:45:43,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:45:46,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:45:46,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 08:45:46,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 08:45:46,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:45:46,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:45:46,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:45:46,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 08:45:46,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:45:46,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 08:45:46,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:45:46,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:45:46,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:45:46,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:45:46,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:45:46,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:45:46,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:45:46,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:45:46,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:45:46,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:45:46,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:45:46,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:45:46,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:45:46,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:45:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:45:46,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996532062] [2020-10-14 08:45:46,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:45:46,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 08:45:46,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574810254] [2020-10-14 08:45:46,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 08:45:46,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:45:46,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 08:45:46,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-14 08:45:46,516 INFO L87 Difference]: Start difference. First operand 182899 states and 259366 transitions. Second operand 11 states. [2020-10-14 08:45:46,680 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 117