/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/array-examples/standard_reverse_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:42:36,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:42:36,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:42:36,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:42:36,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:42:36,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:42:36,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:42:36,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:42:36,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:42:36,213 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:42:36,214 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:42:36,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:42:36,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:42:36,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:42:36,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:42:36,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:42:36,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:42:36,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:42:36,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:42:36,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:42:36,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:42:36,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:42:36,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:42:36,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:42:36,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:42:36,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:42:36,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:42:36,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:42:36,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:42:36,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:42:36,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:42:36,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:42:36,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:42:36,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:42:36,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:42:36,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:42:36,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:42:36,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:42:36,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:42:36,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:42:36,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:42:36,261 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 [2020-10-13 23:42:36,298 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:42:36,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:42:36,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:42:36,300 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:42:36,300 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:42:36,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:42:36,301 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:42:36,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:42:36,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:42:36,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:42:36,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:42:36,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:42:36,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:42:36,303 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:42:36,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:42:36,304 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:42:36,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:42:36,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:42:36,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:42:36,304 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:42:36,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:42:36,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:42:36,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:42:36,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:42:36,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:42:36,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:42:36,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:42:36,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:42:36,306 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:42:36,307 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; [2020-10-13 23:42:36,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:42:36,631 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:42:36,637 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:42:36,638 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:42:36,639 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:42:36,639 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_reverse_ground.i [2020-10-13 23:42:36,706 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/39f220b25/4343a216add04fbd98de6269eb645219/FLAGb7e9e5b98 [2020-10-13 23:42:37,168 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:42:37,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_reverse_ground.i [2020-10-13 23:42:37,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/39f220b25/4343a216add04fbd98de6269eb645219/FLAGb7e9e5b98 [2020-10-13 23:42:37,557 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/39f220b25/4343a216add04fbd98de6269eb645219 [2020-10-13 23:42:37,564 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:42:37,566 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:42:37,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:42:37,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:42:37,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:42:37,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:42:37" (1/1) ... [2020-10-13 23:42:37,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@445b6256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:37, skipping insertion in model container [2020-10-13 23:42:37,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:42:37" (1/1) ... [2020-10-13 23:42:37,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:42:37,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:42:37,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:42:37,762 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:42:37,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:42:37,804 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:42:37,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:37 WrapperNode [2020-10-13 23:42:37,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:42:37,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:42:37,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:42:37,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:42:37,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:37" (1/1) ... [2020-10-13 23:42:37,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:37" (1/1) ... [2020-10-13 23:42:37,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:37" (1/1) ... [2020-10-13 23:42:37,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:37" (1/1) ... [2020-10-13 23:42:37,923 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:37" (1/1) ... [2020-10-13 23:42:37,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:37" (1/1) ... [2020-10-13 23:42:37,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:37" (1/1) ... [2020-10-13 23:42:37,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:42:37,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:42:37,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:42:37,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:42:37,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:37" (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 [2020-10-13 23:42:37,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:42:37,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:42:37,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:42:37,990 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:42:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:42:37,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:42:37,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:42:37,992 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:42:37,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:42:37,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:42:37,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:42:37,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:42:37,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:42:37,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:42:38,257 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:42:38,257 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 23:42:38,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:42:38 BoogieIcfgContainer [2020-10-13 23:42:38,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:42:38,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:42:38,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:42:38,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:42:38,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:42:37" (1/3) ... [2020-10-13 23:42:38,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16344bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:42:38, skipping insertion in model container [2020-10-13 23:42:38,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:37" (2/3) ... [2020-10-13 23:42:38,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16344bce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:42:38, skipping insertion in model container [2020-10-13 23:42:38,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:42:38" (3/3) ... [2020-10-13 23:42:38,272 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_reverse_ground.i [2020-10-13 23:42:38,298 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:42:38,306 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:42:38,320 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:42:38,340 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:42:38,341 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:42:38,341 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:42:38,341 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:42:38,341 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:42:38,341 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:42:38,341 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:42:38,341 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:42:38,358 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-13 23:42:38,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 23:42:38,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:38,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:38,365 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:38,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:38,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1778002988, now seen corresponding path program 1 times [2020-10-13 23:42:38,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:38,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893690623] [2020-10-13 23:42:38,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:38,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:38,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:38,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:38,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 23:42:38,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:38,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-13 23:42:38,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:38,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:38,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:38,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:42:38,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:38,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 23:42:38,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:38,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:38,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:38,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:38,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:38,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 23:42:38,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:38,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:38,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:38,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:38,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:38,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:42:38,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893690623] [2020-10-13 23:42:38,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:42:38,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:42:38,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256790534] [2020-10-13 23:42:38,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:42:38,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:38,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:42:38,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:42:38,848 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-13 23:42:38,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:38,942 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2020-10-13 23:42:38,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:42:38,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-13 23:42:38,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:38,951 INFO L225 Difference]: With dead ends: 46 [2020-10-13 23:42:38,952 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 23:42:38,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:42:38,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 23:42:38,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-13 23:42:38,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 23:42:38,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-13 23:42:38,991 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-10-13 23:42:38,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:38,991 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-13 23:42:38,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:42:38,991 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-13 23:42:38,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 23:42:38,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:38,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:38,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:42:38,993 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:38,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:38,994 INFO L82 PathProgramCache]: Analyzing trace with hash -262172122, now seen corresponding path program 1 times [2020-10-13 23:42:38,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:38,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464232645] [2020-10-13 23:42:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:39,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:39,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:39,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:39,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 23:42:39,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:42:39,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-13 23:42:39,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:39,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:39,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:42:39,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:39,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:42:39,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:39,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:39,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:39,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:39,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:39,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:39,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:42:39,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:39,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:39,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:39,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:39,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:39,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:42:39,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464232645] [2020-10-13 23:42:39,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:42:39,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:42:39,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957116722] [2020-10-13 23:42:39,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:42:39,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:39,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:42:39,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:42:39,237 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2020-10-13 23:42:39,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:39,301 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-10-13 23:42:39,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:42:39,302 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 23:42:39,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:39,303 INFO L225 Difference]: With dead ends: 40 [2020-10-13 23:42:39,303 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 23:42:39,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:42:39,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 23:42:39,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-10-13 23:42:39,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 23:42:39,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-13 23:42:39,312 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2020-10-13 23:42:39,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:39,313 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-13 23:42:39,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:42:39,313 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-13 23:42:39,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 23:42:39,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:39,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:39,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:42:39,315 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:39,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:39,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1323409058, now seen corresponding path program 1 times [2020-10-13 23:42:39,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:39,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701455981] [2020-10-13 23:42:39,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:39,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:39,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:39,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:39,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:39,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 23:42:39,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:42:39,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 446 [2020-10-13 23:42:39,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:39,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:39,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:42:39,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 23:42:39,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:42:39,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:39,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:39,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:39,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:39,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:39,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:39,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:42:39,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:39,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:39,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:39,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:39,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:39,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:42:39,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701455981] [2020-10-13 23:42:39,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:39,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:42:39,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523515748] [2020-10-13 23:42:39,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:42:39,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:39,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:42:39,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:42:39,823 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-10-13 23:42:39,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:39,900 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-10-13 23:42:39,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:42:39,901 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-13 23:42:39,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:39,902 INFO L225 Difference]: With dead ends: 45 [2020-10-13 23:42:39,902 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 23:42:39,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:42:39,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 23:42:39,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-13 23:42:39,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 23:42:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-13 23:42:39,910 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2020-10-13 23:42:39,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:39,911 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-13 23:42:39,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:42:39,911 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-13 23:42:39,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:42:39,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:39,912 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:39,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:42:39,913 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:39,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:39,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1582955806, now seen corresponding path program 2 times [2020-10-13 23:42:39,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:39,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462255270] [2020-10-13 23:42:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:39,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:39,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:40,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:40,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:40,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 23:42:40,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:42:40,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 758 [2020-10-13 23:42:40,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:40,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:40,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:42:40,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:42:40,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:42:40,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:40,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:40,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:40,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:40,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:40,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:40,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:42:40,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:40,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:40,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:40,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:40,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:40,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:42:40,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462255270] [2020-10-13 23:42:40,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:40,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:42:40,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16891675] [2020-10-13 23:42:40,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:42:40,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:40,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:42:40,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:42:40,741 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2020-10-13 23:42:40,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:40,826 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-13 23:42:40,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:42:40,826 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-13 23:42:40,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:40,827 INFO L225 Difference]: With dead ends: 51 [2020-10-13 23:42:40,828 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:42:40,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:42:40,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:42:40,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-13 23:42:40,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 23:42:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-13 23:42:40,835 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2020-10-13 23:42:40,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:40,836 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-13 23:42:40,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:42:40,836 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-13 23:42:40,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:42:40,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:40,837 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:40,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:42:40,837 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:40,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:40,838 INFO L82 PathProgramCache]: Analyzing trace with hash -657216102, now seen corresponding path program 3 times [2020-10-13 23:42:40,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:40,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953048050] [2020-10-13 23:42:40,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:40,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:40,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:41,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:42,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:42,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:42:42,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:42:42,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1438 [2020-10-13 23:42:42,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:42,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:42,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:42:42,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:42:42,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:42:42,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:42,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:42,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:42,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:42,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:42,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:42,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:42:42,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:42,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:42,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:42,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:42,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:42,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:42:42,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953048050] [2020-10-13 23:42:42,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:42,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:42:42,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333467830] [2020-10-13 23:42:42,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:42:42,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:42,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:42:42,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:42:42,369 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 7 states. [2020-10-13 23:42:42,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:42,494 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-10-13 23:42:42,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:42:42,495 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-13 23:42:42,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:42,496 INFO L225 Difference]: With dead ends: 57 [2020-10-13 23:42:42,496 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 23:42:42,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:42:42,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 23:42:42,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-13 23:42:42,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 23:42:42,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-13 23:42:42,504 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2020-10-13 23:42:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:42,505 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-13 23:42:42,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:42:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-13 23:42:42,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 23:42:42,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:42,507 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:42,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:42:42,508 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:42,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:42,508 INFO L82 PathProgramCache]: Analyzing trace with hash 702132246, now seen corresponding path program 4 times [2020-10-13 23:42:42,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:42,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228125878] [2020-10-13 23:42:42,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:42,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:42,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:43,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:44,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:44,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 23:42:44,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:42:44,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2474 [2020-10-13 23:42:44,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:44,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:45,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:42:45,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:42:45,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:42:45,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:42:45,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:45,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:45,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:45,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:45,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:45,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:42:45,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:45,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:45,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:45,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:45,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:45,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:42:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 23:42:45,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228125878] [2020-10-13 23:42:45,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:45,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:42:45,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480652415] [2020-10-13 23:42:45,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:42:45,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:45,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:42:45,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:42:45,081 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 8 states. [2020-10-13 23:42:45,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:45,212 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-10-13 23:42:45,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:42:45,213 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-13 23:42:45,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:45,214 INFO L225 Difference]: With dead ends: 63 [2020-10-13 23:42:45,215 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 23:42:45,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:42:45,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 23:42:45,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-13 23:42:45,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 23:42:45,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-13 23:42:45,229 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 31 [2020-10-13 23:42:45,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:45,229 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-13 23:42:45,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:42:45,230 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-13 23:42:45,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:42:45,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:45,232 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:45,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:42:45,232 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:45,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:45,233 INFO L82 PathProgramCache]: Analyzing trace with hash -294189934, now seen corresponding path program 5 times [2020-10-13 23:42:45,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:45,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658972440] [2020-10-13 23:42:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:45,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:45,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:45,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:49,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:49,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 23:42:49,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:42:49,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4321 [2020-10-13 23:42:49,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:49,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:49,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:42:49,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:49,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:42:49,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:49,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:49,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:49,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:49,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:49,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:49,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:42:49,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:49,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:49,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:49,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:49,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:49,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 23:42:49,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658972440] [2020-10-13 23:42:49,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:49,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:42:49,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469887045] [2020-10-13 23:42:49,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:42:49,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:49,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:42:49,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:42:49,665 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-10-13 23:42:49,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:49,800 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2020-10-13 23:42:49,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:42:49,800 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-13 23:42:49,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:49,801 INFO L225 Difference]: With dead ends: 69 [2020-10-13 23:42:49,801 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 23:42:49,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:42:49,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 23:42:49,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-13 23:42:49,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 23:42:49,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-13 23:42:49,813 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 35 [2020-10-13 23:42:49,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:49,814 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-13 23:42:49,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:42:49,814 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-13 23:42:49,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:42:49,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:49,816 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:49,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:42:49,816 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:49,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:49,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1966517006, now seen corresponding path program 6 times [2020-10-13 23:42:49,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:49,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57982920] [2020-10-13 23:42:49,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:49,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:49,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:50,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:54,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:54,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:42:54,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:42:54,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4771 [2020-10-13 23:42:54,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:54,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:54,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:42:54,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:54,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:42:54,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:54,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:54,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:54,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:54,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:54,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:54,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:54,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:54,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:54,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:54,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:54,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:54,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:42:54,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57982920] [2020-10-13 23:42:54,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:54,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:42:54,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216790204] [2020-10-13 23:42:54,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:42:54,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:54,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:42:54,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:42:54,705 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 10 states. [2020-10-13 23:42:54,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:54,883 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2020-10-13 23:42:54,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:42:54,884 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-13 23:42:54,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:54,885 INFO L225 Difference]: With dead ends: 75 [2020-10-13 23:42:54,887 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 23:42:54,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:42:54,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 23:42:54,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-13 23:42:54,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 23:42:54,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-13 23:42:54,901 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 39 [2020-10-13 23:42:54,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:54,901 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-13 23:42:54,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:42:54,901 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-13 23:42:54,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 23:42:54,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:54,904 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:54,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:42:54,905 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:54,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:54,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1042523018, now seen corresponding path program 7 times [2020-10-13 23:42:54,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:54,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063741849] [2020-10-13 23:42:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:54,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:54,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:55,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:59,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:59,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 23:42:59,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:42:59,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:42:59,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:59,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:59,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:42:59,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:59,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:42:59,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:00,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:00,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:00,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:00,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:00,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:00,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:43:00,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:00,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:00,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:00,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:00,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:00,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 23:43:00,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063741849] [2020-10-13 23:43:00,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:00,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:43:00,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180917664] [2020-10-13 23:43:00,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:43:00,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:00,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:43:00,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:43:00,036 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 11 states. [2020-10-13 23:43:00,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:00,159 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-10-13 23:43:00,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:43:00,160 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-13 23:43:00,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:00,161 INFO L225 Difference]: With dead ends: 81 [2020-10-13 23:43:00,161 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 23:43:00,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:43:00,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 23:43:00,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-13 23:43:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:43:00,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-13 23:43:00,167 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2020-10-13 23:43:00,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:00,168 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-13 23:43:00,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:43:00,168 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-13 23:43:00,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 23:43:00,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:00,169 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:00,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:43:00,169 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:00,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:00,170 INFO L82 PathProgramCache]: Analyzing trace with hash 2059988486, now seen corresponding path program 8 times [2020-10-13 23:43:00,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:00,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783928767] [2020-10-13 23:43:00,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:00,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:00,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:01,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:05,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:05,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 23:43:05,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:05,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:43:05,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:05,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:05,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:43:05,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:05,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:43:05,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:43:05,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:05,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:05,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:05,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:05,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:05,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:05,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:05,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:05,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:05,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:05,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:05,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 23:43:05,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783928767] [2020-10-13 23:43:05,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:05,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:43:05,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567223040] [2020-10-13 23:43:05,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:43:05,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:05,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:43:05,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:43:05,328 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 12 states. [2020-10-13 23:43:05,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:05,470 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2020-10-13 23:43:05,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:43:05,470 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-13 23:43:05,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:05,471 INFO L225 Difference]: With dead ends: 87 [2020-10-13 23:43:05,471 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 23:43:05,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:43:05,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 23:43:05,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-10-13 23:43:05,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 23:43:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-13 23:43:05,488 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 47 [2020-10-13 23:43:05,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:05,488 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-13 23:43:05,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:43:05,488 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-13 23:43:05,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:43:05,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:05,491 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:05,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:43:05,491 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:05,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:05,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1909355902, now seen corresponding path program 9 times [2020-10-13 23:43:05,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:05,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379134761] [2020-10-13 23:43:05,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:05,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:05,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:05,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:06,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:10,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:10,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 23:43:10,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:10,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:43:10,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:10,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:10,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:43:10,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 23:43:10,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:43:10,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:10,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:10,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:10,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:10,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:10,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:10,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:10,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:10,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:10,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:10,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:10,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:10,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 23:43:10,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379134761] [2020-10-13 23:43:10,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:10,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:43:10,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501026469] [2020-10-13 23:43:10,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:43:10,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:10,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:43:10,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:43:10,629 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 13 states. [2020-10-13 23:43:10,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:10,774 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2020-10-13 23:43:10,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:43:10,775 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-13 23:43:10,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:10,776 INFO L225 Difference]: With dead ends: 93 [2020-10-13 23:43:10,776 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 23:43:10,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:43:10,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 23:43:10,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-10-13 23:43:10,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 23:43:10,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-13 23:43:10,787 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 51 [2020-10-13 23:43:10,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:10,787 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-13 23:43:10,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:43:10,787 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-13 23:43:10,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 23:43:10,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:10,788 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:10,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:43:10,789 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:10,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:10,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1930921730, now seen corresponding path program 10 times [2020-10-13 23:43:10,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:10,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232758407] [2020-10-13 23:43:10,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:10,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:10,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:12,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:15,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:15,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 23:43:15,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:15,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:43:15,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:15,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:15,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:43:15,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 23:43:15,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:43:15,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:15,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:16,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:16,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:16,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:16,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:16,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:43:16,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:16,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:16,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:16,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:16,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:16,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2020-10-13 23:43:16,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232758407] [2020-10-13 23:43:16,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:43:16,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-13 23:43:16,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076797785] [2020-10-13 23:43:16,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:43:16,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:16,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:43:16,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:43:16,013 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 10 states. [2020-10-13 23:43:16,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:16,242 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-13 23:43:16,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:43:16,243 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-13 23:43:16,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:16,244 INFO L225 Difference]: With dead ends: 70 [2020-10-13 23:43:16,244 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 23:43:16,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:43:16,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 23:43:16,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-10-13 23:43:16,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 23:43:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-13 23:43:16,253 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 55 [2020-10-13 23:43:16,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:16,253 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-13 23:43:16,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:43:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-13 23:43:16,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 23:43:16,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:16,255 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:16,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:43:16,255 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:16,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:16,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1633766453, now seen corresponding path program 1 times [2020-10-13 23:43:16,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:16,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582848202] [2020-10-13 23:43:16,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:16,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:16,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:19,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:21,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:21,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:43:21,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:21,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:43:21,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:21,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:21,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:43:21,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 23:43:21,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:43:21,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:21,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:21,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:21,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:21,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:21,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:21,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:21,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:21,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:21,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:21,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:21,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:21,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:21,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-13 23:43:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:21,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:21,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:21,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:43:21,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:21,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:21,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:21,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:21,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:21,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:43:21,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:21,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-13 23:43:21,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582848202] [2020-10-13 23:43:21,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:21,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:43:21,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056808254] [2020-10-13 23:43:21,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:43:21,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:21,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:43:21,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:43:21,416 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 14 states. [2020-10-13 23:43:21,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:21,571 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2020-10-13 23:43:21,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:43:21,572 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-13 23:43:21,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:21,577 INFO L225 Difference]: With dead ends: 111 [2020-10-13 23:43:21,577 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 23:43:21,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:43:21,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 23:43:21,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-10-13 23:43:21,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 23:43:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-13 23:43:21,584 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2020-10-13 23:43:21,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:21,584 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-13 23:43:21,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:43:21,585 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-13 23:43:21,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 23:43:21,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:21,586 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:21,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:43:21,586 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:21,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:21,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1851216049, now seen corresponding path program 2 times [2020-10-13 23:43:21,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:21,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486124505] [2020-10-13 23:43:21,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:21,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:21,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:23,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:26,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:26,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 23:43:26,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:26,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:43:26,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:26,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:26,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:43:26,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:26,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:43:26,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:26,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:26,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:26,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:26,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:26,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:26,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:26,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:26,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:26,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:26,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:26,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:26,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:26,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-13 23:43:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:26,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:26,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:26,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:43:26,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:26,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:26,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:26,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:26,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:26,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:43:26,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:26,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-10-13 23:43:26,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486124505] [2020-10-13 23:43:26,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:26,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:43:26,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700510080] [2020-10-13 23:43:26,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:43:26,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:26,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:43:26,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:43:26,773 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 15 states. [2020-10-13 23:43:26,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:26,957 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2020-10-13 23:43:26,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:43:26,958 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-10-13 23:43:26,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:26,959 INFO L225 Difference]: With dead ends: 117 [2020-10-13 23:43:26,959 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 23:43:26,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:43:26,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 23:43:26,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-13 23:43:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 23:43:26,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-13 23:43:26,971 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 67 [2020-10-13 23:43:26,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:26,972 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-13 23:43:26,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:43:26,972 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-13 23:43:26,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 23:43:26,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:26,973 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:26,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:43:26,973 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:26,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:26,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1807722285, now seen corresponding path program 3 times [2020-10-13 23:43:26,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:26,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627162914] [2020-10-13 23:43:26,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:26,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:27,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:30,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:31,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:31,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 23:43:31,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:31,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:43:31,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:31,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:31,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:43:31,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 23:43:31,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:43:31,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:32,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:32,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:32,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:32,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:32,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:32,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:32,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:32,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:32,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:32,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:32,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:32,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:32,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-13 23:43:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:32,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:32,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:32,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:43:32,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:32,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:43:32,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:32,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:32,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:32,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:43:32,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:32,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-10-13 23:43:32,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627162914] [2020-10-13 23:43:32,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:32,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:43:32,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36257876] [2020-10-13 23:43:32,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:43:32,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:32,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:43:32,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:43:32,168 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 16 states. [2020-10-13 23:43:32,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:32,379 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2020-10-13 23:43:32,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:43:32,379 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-10-13 23:43:32,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:32,380 INFO L225 Difference]: With dead ends: 123 [2020-10-13 23:43:32,380 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 23:43:32,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:43:32,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 23:43:32,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-10-13 23:43:32,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 23:43:32,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-13 23:43:32,387 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 71 [2020-10-13 23:43:32,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:32,387 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-13 23:43:32,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:43:32,387 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-13 23:43:32,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 23:43:32,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:32,388 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:32,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:43:32,389 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:32,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:32,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1202016169, now seen corresponding path program 4 times [2020-10-13 23:43:32,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:32,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070973812] [2020-10-13 23:43:32,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:32,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:32,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:36,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:37,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:37,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 23:43:37,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:43:37,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:43:37,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:37,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:37,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:43:37,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:43:37,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:43:37,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:37,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:37,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:37,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:37,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:37,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:37,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:43:37,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:37,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:37,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:37,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:37,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:37,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:37,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-13 23:43:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:37,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:37,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:37,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:43:37,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:37,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:37,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:37,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:37,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:37,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:43:37,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:37,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-13 23:43:37,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070973812] [2020-10-13 23:43:37,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:37,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:43:37,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809644983] [2020-10-13 23:43:37,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:43:37,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:37,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:43:37,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:43:37,625 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 17 states. [2020-10-13 23:43:37,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:37,877 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2020-10-13 23:43:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:43:37,877 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2020-10-13 23:43:37,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:37,879 INFO L225 Difference]: With dead ends: 129 [2020-10-13 23:43:37,879 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 23:43:37,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:43:37,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 23:43:37,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-10-13 23:43:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:43:37,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-13 23:43:37,899 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 75 [2020-10-13 23:43:37,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:37,899 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-13 23:43:37,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:43:37,900 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-13 23:43:37,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 23:43:37,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:37,905 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:37,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:43:37,905 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:37,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:37,909 INFO L82 PathProgramCache]: Analyzing trace with hash 563300901, now seen corresponding path program 5 times [2020-10-13 23:43:37,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:37,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361013753] [2020-10-13 23:43:37,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:37,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:37,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:42,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:42,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 23:43:42,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:43:42,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:43:42,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:42,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:42,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:43:42,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:42,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:43:42,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:43,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:43,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:43,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:43,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:43,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:43,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:43,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:43,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:43,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:43,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:43,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:43,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:43,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-13 23:43:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:43,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:43,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:43,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:43:43,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:43,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:43,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:43,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:43,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:43,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:43:43,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:43,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-10-13 23:43:43,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361013753] [2020-10-13 23:43:43,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:43,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:43:43,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473964258] [2020-10-13 23:43:43,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:43:43,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:43,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:43:43,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:43:43,192 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 18 states. [2020-10-13 23:43:43,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:43,447 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2020-10-13 23:43:43,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:43:43,447 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-10-13 23:43:43,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:43,448 INFO L225 Difference]: With dead ends: 135 [2020-10-13 23:43:43,448 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 23:43:43,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:43:43,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 23:43:43,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-10-13 23:43:43,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 23:43:43,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-13 23:43:43,458 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 79 [2020-10-13 23:43:43,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:43,459 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-13 23:43:43,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:43:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-13 23:43:43,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 23:43:43,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:43,462 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:43,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:43:43,462 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:43,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:43,462 INFO L82 PathProgramCache]: Analyzing trace with hash -896231775, now seen corresponding path program 6 times [2020-10-13 23:43:43,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:43,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652239215] [2020-10-13 23:43:43,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:43,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:43,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:48,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:48,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 23:43:48,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:43:48,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:43:48,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:48,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:48,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:43:48,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 23:43:48,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:43:48,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:48,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:48,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:48,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:48,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:48,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:48,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:43:48,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:48,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:48,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:48,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:48,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:48,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:48,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-13 23:43:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:48,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:48,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:48,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:43:48,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:48,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:48,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:48,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:48,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:48,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:43:48,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:48,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2020-10-13 23:43:48,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652239215] [2020-10-13 23:43:48,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:48,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:43:48,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809438944] [2020-10-13 23:43:48,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:43:48,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:48,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:43:48,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:43:48,736 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 19 states. [2020-10-13 23:43:48,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:48,939 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2020-10-13 23:43:48,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:43:48,940 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2020-10-13 23:43:48,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:48,941 INFO L225 Difference]: With dead ends: 141 [2020-10-13 23:43:48,941 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 23:43:48,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:43:48,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 23:43:48,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-10-13 23:43:48,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 23:43:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-13 23:43:48,949 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 83 [2020-10-13 23:43:48,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:48,949 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-13 23:43:48,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:43:48,949 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-13 23:43:48,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 23:43:48,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:48,950 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:48,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:43:48,950 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:48,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:48,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1161049373, now seen corresponding path program 7 times [2020-10-13 23:43:48,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:48,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096575967] [2020-10-13 23:43:48,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:48,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:48,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:53,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:53,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 23:43:53,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:43:53,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:43:53,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:53,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:53,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:43:53,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:53,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:43:53,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:54,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:54,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:54,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:54,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:54,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:54,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:54,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:54,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:54,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:54,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:54,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:54,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:54,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-13 23:43:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:54,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:54,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:54,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:43:54,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:54,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:54,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:54,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:54,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:54,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:43:54,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:54,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2020-10-13 23:43:54,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096575967] [2020-10-13 23:43:54,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:54,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:43:54,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463484412] [2020-10-13 23:43:54,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:43:54,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:54,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:43:54,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:43:54,201 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 20 states. [2020-10-13 23:43:54,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:54,428 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2020-10-13 23:43:54,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:43:54,429 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 87 [2020-10-13 23:43:54,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:54,430 INFO L225 Difference]: With dead ends: 147 [2020-10-13 23:43:54,430 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 23:43:54,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:43:54,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 23:43:54,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-10-13 23:43:54,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 23:43:54,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-13 23:43:54,440 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 87 [2020-10-13 23:43:54,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:54,440 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-13 23:43:54,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:43:54,440 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-13 23:43:54,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 23:43:54,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:54,441 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:54,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:43:54,442 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:54,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:54,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1165829529, now seen corresponding path program 8 times [2020-10-13 23:43:54,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:54,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117343056] [2020-10-13 23:43:54,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:54,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:54,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:59,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:59,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 23:43:59,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:43:59,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:43:59,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:59,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:59,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:43:59,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:59,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:43:59,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:59,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:59,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:59,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:59,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:59,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:59,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:59,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:59,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:59,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:59,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:59,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:59,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:59,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-13 23:43:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:59,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:59,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:59,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:43:59,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:59,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:59,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:59,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:59,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:59,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:43:59,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:59,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-10-13 23:43:59,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117343056] [2020-10-13 23:43:59,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:59,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:43:59,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712272768] [2020-10-13 23:43:59,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:43:59,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:59,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:43:59,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:43:59,710 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 21 states. [2020-10-13 23:43:59,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:59,951 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2020-10-13 23:43:59,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:43:59,951 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 91 [2020-10-13 23:43:59,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:59,953 INFO L225 Difference]: With dead ends: 153 [2020-10-13 23:43:59,953 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 23:43:59,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:43:59,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 23:43:59,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-10-13 23:43:59,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 23:43:59,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-10-13 23:43:59,961 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 91 [2020-10-13 23:43:59,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:59,964 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-10-13 23:43:59,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:43:59,964 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-10-13 23:43:59,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 23:43:59,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:59,967 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:59,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:43:59,968 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:59,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:59,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1325766635, now seen corresponding path program 9 times [2020-10-13 23:43:59,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:59,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708894993] [2020-10-13 23:43:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:59,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:00,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:04,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:04,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 23:44:04,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:04,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:44:04,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:04,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:04,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:44:04,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 23:44:04,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:44:04,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:05,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:05,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:05,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:05,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:05,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:05,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:05,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:05,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:05,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:05,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:05,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:05,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:05,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-13 23:44:05,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:05,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:05,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:05,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:05,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:05,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:44:05,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:05,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:05,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:05,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:05,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:05,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2020-10-13 23:44:05,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708894993] [2020-10-13 23:44:05,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:05,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:44:05,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149343430] [2020-10-13 23:44:05,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:44:05,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:05,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:44:05,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:44:05,267 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 22 states. [2020-10-13 23:44:05,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:05,517 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2020-10-13 23:44:05,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:44:05,518 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 95 [2020-10-13 23:44:05,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:05,519 INFO L225 Difference]: With dead ends: 159 [2020-10-13 23:44:05,519 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 23:44:05,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:44:05,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 23:44:05,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-10-13 23:44:05,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 23:44:05,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-10-13 23:44:05,527 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 95 [2020-10-13 23:44:05,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:05,527 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-10-13 23:44:05,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:44:05,528 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-10-13 23:44:05,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 23:44:05,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:05,529 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:05,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:44:05,529 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:05,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:05,530 INFO L82 PathProgramCache]: Analyzing trace with hash 515308689, now seen corresponding path program 10 times [2020-10-13 23:44:05,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:05,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301206832] [2020-10-13 23:44:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:05,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:05,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:10,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:10,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 23:44:10,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:10,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:44:10,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:10,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:10,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:44:10,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:10,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:44:10,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:10,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:10,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:10,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:10,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:10,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:10,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:10,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:10,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:10,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:10,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:10,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:10,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:10,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-13 23:44:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:10,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:10,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:10,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:10,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:10,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:44:10,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:10,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:10,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:10,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:10,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:10,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 726 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-10-13 23:44:10,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301206832] [2020-10-13 23:44:10,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:10,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:44:10,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890272928] [2020-10-13 23:44:10,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:44:10,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:10,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:44:10,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:44:10,845 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 23 states. [2020-10-13 23:44:11,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:11,118 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2020-10-13 23:44:11,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:44:11,121 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 99 [2020-10-13 23:44:11,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:11,122 INFO L225 Difference]: With dead ends: 165 [2020-10-13 23:44:11,122 INFO L226 Difference]: Without dead ends: 108 [2020-10-13 23:44:11,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:44:11,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-13 23:44:11,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2020-10-13 23:44:11,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 23:44:11,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-10-13 23:44:11,132 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 99 [2020-10-13 23:44:11,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:11,133 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-10-13 23:44:11,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:44:11,133 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-10-13 23:44:11,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 23:44:11,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:11,134 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:11,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:44:11,135 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:11,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:11,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1463673613, now seen corresponding path program 11 times [2020-10-13 23:44:11,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:11,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589390637] [2020-10-13 23:44:11,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:11,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:11,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:16,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:16,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 23:44:16,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:16,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 23:44:16,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:16,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:16,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:44:16,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 23:44:16,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:44:16,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:16,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:16,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:16,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:16,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:16,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:16,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:16,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:16,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:16,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:16,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:16,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:16,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:16,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-13 23:44:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:16,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:16,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:16,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:16,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:16,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:16,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:16,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:16,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:16,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:16,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:16,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2020-10-13 23:44:16,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589390637] [2020-10-13 23:44:16,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:16,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:44:16,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4389388] [2020-10-13 23:44:16,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:44:16,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:16,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:44:16,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:44:16,484 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 24 states. [2020-10-13 23:44:16,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:16,742 INFO L93 Difference]: Finished difference Result 171 states and 176 transitions. [2020-10-13 23:44:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:44:16,743 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 103 [2020-10-13 23:44:16,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:16,744 INFO L225 Difference]: With dead ends: 171 [2020-10-13 23:44:16,744 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 23:44:16,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:44:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 23:44:16,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-10-13 23:44:16,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 23:44:16,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-10-13 23:44:16,752 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 103 [2020-10-13 23:44:16,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:16,752 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-10-13 23:44:16,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:44:16,752 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-10-13 23:44:16,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 23:44:16,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:16,753 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:16,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:44:16,754 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:16,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:16,754 INFO L82 PathProgramCache]: Analyzing trace with hash -728097911, now seen corresponding path program 12 times [2020-10-13 23:44:16,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:16,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805653195] [2020-10-13 23:44:16,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:16,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:16,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:21,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:21,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 23:44:21,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:21,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 23:44:21,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:21,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:21,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:44:21,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:21,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:44:21,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:22,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:22,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:22,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:22,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:22,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:22,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:22,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:22,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:22,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:22,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:22,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-13 23:44:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:22,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:22,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:22,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:22,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:22,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:44:22,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:22,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:22,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:22,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:22,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:22,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2020-10-13 23:44:22,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805653195] [2020-10-13 23:44:22,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:22,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:44:22,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519504598] [2020-10-13 23:44:22,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:44:22,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:22,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:44:22,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:44:22,119 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 25 states. [2020-10-13 23:44:22,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:22,397 INFO L93 Difference]: Finished difference Result 177 states and 182 transitions. [2020-10-13 23:44:22,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:44:22,398 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 107 [2020-10-13 23:44:22,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:22,399 INFO L225 Difference]: With dead ends: 177 [2020-10-13 23:44:22,399 INFO L226 Difference]: Without dead ends: 116 [2020-10-13 23:44:22,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:44:22,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-13 23:44:22,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2020-10-13 23:44:22,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-13 23:44:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-10-13 23:44:22,410 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 107 [2020-10-13 23:44:22,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:22,410 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-10-13 23:44:22,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:44:22,410 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-10-13 23:44:22,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 23:44:22,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:22,416 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:22,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:44:22,417 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:22,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:22,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1112974853, now seen corresponding path program 13 times [2020-10-13 23:44:22,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:22,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744333550] [2020-10-13 23:44:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:22,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:22,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:27,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:27,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 23:44:27,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:27,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-13 23:44:27,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:27,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:27,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:44:27,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:27,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:44:27,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:27,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:27,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:27,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:27,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:27,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:27,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:27,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:27,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:27,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:27,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:27,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:27,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:27,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-13 23:44:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:27,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:27,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:27,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:27,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:27,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:44:27,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:27,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:27,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:27,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:27,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:27,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2020-10-13 23:44:27,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744333550] [2020-10-13 23:44:27,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:27,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:44:27,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550618645] [2020-10-13 23:44:27,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:44:27,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:27,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:44:27,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:44:27,842 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 26 states. [2020-10-13 23:44:28,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:28,154 INFO L93 Difference]: Finished difference Result 183 states and 188 transitions. [2020-10-13 23:44:28,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:44:28,155 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 111 [2020-10-13 23:44:28,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:28,157 INFO L225 Difference]: With dead ends: 183 [2020-10-13 23:44:28,157 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 23:44:28,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:44:28,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 23:44:28,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2020-10-13 23:44:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 23:44:28,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2020-10-13 23:44:28,164 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 111 [2020-10-13 23:44:28,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:28,164 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2020-10-13 23:44:28,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:44:28,164 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2020-10-13 23:44:28,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 23:44:28,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:28,166 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:28,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:44:28,166 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:28,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:28,166 INFO L82 PathProgramCache]: Analyzing trace with hash -42040703, now seen corresponding path program 14 times [2020-10-13 23:44:28,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:28,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007047250] [2020-10-13 23:44:28,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:28,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:28,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:33,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:33,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 23:44:33,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:33,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-13 23:44:33,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:33,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:33,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:44:33,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 23:44:33,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 23:44:33,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:33,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:33,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:33,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:33,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:33,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:33,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:33,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:33,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:33,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:33,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:33,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:33,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:33,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-13 23:44:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:33,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:33,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:33,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:33,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:33,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:33,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:33,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:33,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:33,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:33,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:33,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:44:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2020-10-13 23:44:33,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007047250] [2020-10-13 23:44:33,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:33,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:44:33,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957803325] [2020-10-13 23:44:33,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:44:33,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:33,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:44:33,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:44:33,630 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 27 states. [2020-10-13 23:44:33,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:33,938 INFO L93 Difference]: Finished difference Result 189 states and 194 transitions. [2020-10-13 23:44:33,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:44:33,939 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 115 [2020-10-13 23:44:33,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:33,940 INFO L225 Difference]: With dead ends: 189 [2020-10-13 23:44:33,940 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 23:44:33,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:44:33,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 23:44:33,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-13 23:44:33,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 23:44:33,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2020-10-13 23:44:33,948 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 115 [2020-10-13 23:44:33,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:33,948 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2020-10-13 23:44:33,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:44:33,948 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2020-10-13 23:44:33,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 23:44:33,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:33,949 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:33,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:44:33,950 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:33,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:33,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1801670403, now seen corresponding path program 15 times [2020-10-13 23:44:33,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:33,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622469118] [2020-10-13 23:44:33,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:33,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:34,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:39,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:39,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 23:44:39,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:39,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-13 23:44:39,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:39,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:39,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:44:39,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:39,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:44:39,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:39,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:39,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:39,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:39,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:39,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:39,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:39,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:39,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:39,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:39,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:39,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:39,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:39,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-13 23:44:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:39,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:39,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:39,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:39,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:39,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:44:39,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:39,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:39,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:39,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:39,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:39,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2020-10-13 23:44:39,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622469118] [2020-10-13 23:44:39,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:39,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:44:39,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168757310] [2020-10-13 23:44:39,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:44:39,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:39,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:44:39,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:44:39,443 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 28 states. [2020-10-13 23:44:39,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:39,771 INFO L93 Difference]: Finished difference Result 195 states and 200 transitions. [2020-10-13 23:44:39,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:44:39,771 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 119 [2020-10-13 23:44:39,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:39,773 INFO L225 Difference]: With dead ends: 195 [2020-10-13 23:44:39,773 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 23:44:39,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:44:39,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 23:44:39,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-10-13 23:44:39,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 23:44:39,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-10-13 23:44:39,782 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 119 [2020-10-13 23:44:39,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:39,783 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-10-13 23:44:39,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:44:39,783 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-10-13 23:44:39,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 23:44:39,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:39,784 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:39,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:44:39,784 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:39,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:39,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1203515769, now seen corresponding path program 16 times [2020-10-13 23:44:39,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:39,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981548851] [2020-10-13 23:44:39,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:39,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:39,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:44,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:44,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-13 23:44:44,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:44,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 23:44:44,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:44,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:44,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:44:44,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-13 23:44:44,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 23:44:44,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:45,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:45,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:45,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:45,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:45,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:45,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:44:45,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:45,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:45,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:45,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:45,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:45,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:44:45,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-10-13 23:44:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:45,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:45,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:45,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:45,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:45,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:45,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:45,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:45,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:45,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:45,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:45,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:44:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 2 proven. 625 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2020-10-13 23:44:45,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981548851] [2020-10-13 23:44:45,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:45,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:44:45,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057269068] [2020-10-13 23:44:45,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:44:45,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:45,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:44:45,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:44:45,263 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 29 states. [2020-10-13 23:44:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:45,596 INFO L93 Difference]: Finished difference Result 201 states and 206 transitions. [2020-10-13 23:44:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:44:45,597 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 123 [2020-10-13 23:44:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:45,598 INFO L225 Difference]: With dead ends: 201 [2020-10-13 23:44:45,598 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 23:44:45,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:44:45,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 23:44:45,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-10-13 23:44:45,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 23:44:45,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2020-10-13 23:44:45,610 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 123 [2020-10-13 23:44:45,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:45,610 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2020-10-13 23:44:45,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:44:45,611 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2020-10-13 23:44:45,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-13 23:44:45,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:45,612 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:45,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:44:45,612 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:45,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:45,612 INFO L82 PathProgramCache]: Analyzing trace with hash -2006449163, now seen corresponding path program 17 times [2020-10-13 23:44:45,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:45,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712343920] [2020-10-13 23:44:45,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:45,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:45,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:50,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:50,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-13 23:44:50,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:50,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-13 23:44:50,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:50,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:50,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:44:50,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:50,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 23:44:50,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:51,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:51,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:51,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:51,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:51,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:51,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:44:51,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:51,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:51,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:51,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:51,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:51,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:51,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-13 23:44:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:51,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:51,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:51,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:51,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:51,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:51,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:51,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:51,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:51,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:51,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:51,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:51,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1356 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2020-10-13 23:44:51,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712343920] [2020-10-13 23:44:51,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:51,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:44:51,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177474727] [2020-10-13 23:44:51,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:44:51,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:51,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:44:51,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:44:51,148 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 30 states. [2020-10-13 23:44:51,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:51,505 INFO L93 Difference]: Finished difference Result 207 states and 212 transitions. [2020-10-13 23:44:51,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:44:51,506 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 127 [2020-10-13 23:44:51,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:51,507 INFO L225 Difference]: With dead ends: 207 [2020-10-13 23:44:51,508 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 23:44:51,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:44:51,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 23:44:51,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-10-13 23:44:51,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-13 23:44:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-10-13 23:44:51,516 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 127 [2020-10-13 23:44:51,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:51,516 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-10-13 23:44:51,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:44:51,517 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-10-13 23:44:51,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 23:44:51,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:51,518 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:51,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:44:51,518 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:51,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:51,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2041260145, now seen corresponding path program 18 times [2020-10-13 23:44:51,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:51,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837720058] [2020-10-13 23:44:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:51,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:51,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:56,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:56,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-13 23:44:56,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:44:56,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-13 23:44:56,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:56,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:56,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 23:44:56,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 23:44:56,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 23:44:56,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:57,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:57,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:57,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:57,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:57,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:57,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:57,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:57,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:57,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:57,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:57,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:57,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:57,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-13 23:44:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:57,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:57,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:57,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:44:57,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:57,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:44:57,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:57,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:57,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:57,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:44:57,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:57,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1462 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2020-10-13 23:44:57,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837720058] [2020-10-13 23:44:57,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:57,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 23:44:57,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903761016] [2020-10-13 23:44:57,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 23:44:57,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:57,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 23:44:57,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:44:57,099 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 31 states. [2020-10-13 23:44:57,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:57,473 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2020-10-13 23:44:57,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 23:44:57,474 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 131 [2020-10-13 23:44:57,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:57,475 INFO L225 Difference]: With dead ends: 213 [2020-10-13 23:44:57,475 INFO L226 Difference]: Without dead ends: 140 [2020-10-13 23:44:57,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:44:57,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-13 23:44:57,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2020-10-13 23:44:57,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 23:44:57,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2020-10-13 23:44:57,484 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 131 [2020-10-13 23:44:57,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:57,484 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2020-10-13 23:44:57,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 23:44:57,484 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2020-10-13 23:44:57,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 23:44:57,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:57,486 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:57,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:44:57,486 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:57,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:57,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1880137453, now seen corresponding path program 19 times [2020-10-13 23:44:57,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:57,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53879341] [2020-10-13 23:44:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:57,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:57,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:02,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:02,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 23:45:02,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:02,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:45:02,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:02,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:02,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:45:02,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-13 23:45:02,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 23:45:02,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:03,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:03,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:03,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:03,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:03,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:03,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:45:03,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:03,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:03,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:03,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:03,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:03,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:45:03,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-13 23:45:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:03,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:03,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:03,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:03,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:03,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:45:03,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:03,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:03,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:03,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:03,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:03,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:45:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1572 backedges. 2 proven. 784 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-10-13 23:45:03,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53879341] [2020-10-13 23:45:03,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:03,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:45:03,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457699373] [2020-10-13 23:45:03,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:45:03,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:03,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:45:03,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:45:03,226 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 32 states. [2020-10-13 23:45:03,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:03,538 INFO L93 Difference]: Finished difference Result 219 states and 224 transitions. [2020-10-13 23:45:03,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:45:03,539 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 135 [2020-10-13 23:45:03,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:03,541 INFO L225 Difference]: With dead ends: 219 [2020-10-13 23:45:03,541 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 23:45:03,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:45:03,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 23:45:03,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-10-13 23:45:03,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 23:45:03,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2020-10-13 23:45:03,552 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 135 [2020-10-13 23:45:03,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:03,552 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2020-10-13 23:45:03,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:45:03,552 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2020-10-13 23:45:03,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-13 23:45:03,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:03,553 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:03,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:45:03,555 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:03,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:03,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1906534249, now seen corresponding path program 20 times [2020-10-13 23:45:03,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:03,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208276692] [2020-10-13 23:45:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:03,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:03,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:08,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:08,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 23:45:08,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:08,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:45:08,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:08,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:08,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 23:45:08,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 23:45:08,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 23:45:08,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:09,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:09,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:09,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:09,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:09,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:09,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:45:09,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:09,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:09,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:09,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:09,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:09,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:09,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-10-13 23:45:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:09,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:09,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:09,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:09,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:09,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:45:09,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:09,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:09,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:09,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:09,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:09,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:09,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1686 backedges. 2 proven. 841 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2020-10-13 23:45:09,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208276692] [2020-10-13 23:45:09,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:09,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 23:45:09,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790179449] [2020-10-13 23:45:09,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 23:45:09,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:09,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 23:45:09,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:45:09,167 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 33 states. [2020-10-13 23:45:09,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:09,511 INFO L93 Difference]: Finished difference Result 225 states and 230 transitions. [2020-10-13 23:45:09,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 23:45:09,511 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 139 [2020-10-13 23:45:09,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:09,512 INFO L225 Difference]: With dead ends: 225 [2020-10-13 23:45:09,512 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 23:45:09,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:45:09,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 23:45:09,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-10-13 23:45:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 23:45:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2020-10-13 23:45:09,521 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 139 [2020-10-13 23:45:09,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:09,521 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2020-10-13 23:45:09,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 23:45:09,522 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2020-10-13 23:45:09,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-13 23:45:09,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:09,523 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:09,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:45:09,523 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:09,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1242660379, now seen corresponding path program 21 times [2020-10-13 23:45:09,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:09,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467892292] [2020-10-13 23:45:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:09,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:09,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:14,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:14,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-13 23:45:14,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:14,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-13 23:45:14,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:14,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:14,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 23:45:14,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-13 23:45:14,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 23:45:14,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:15,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:15,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:15,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:15,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:15,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:15,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:15,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:15,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:15,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:15,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:15,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:15,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:15,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-13 23:45:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:15,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:15,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:15,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:15,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:15,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:45:15,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:15,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:15,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:15,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:15,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:15,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1804 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked. [2020-10-13 23:45:15,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467892292] [2020-10-13 23:45:15,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:15,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 23:45:15,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858413484] [2020-10-13 23:45:15,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 23:45:15,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:15,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 23:45:15,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:45:15,262 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 34 states. [2020-10-13 23:45:15,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:15,645 INFO L93 Difference]: Finished difference Result 231 states and 236 transitions. [2020-10-13 23:45:15,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 23:45:15,646 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 143 [2020-10-13 23:45:15,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:15,647 INFO L225 Difference]: With dead ends: 231 [2020-10-13 23:45:15,647 INFO L226 Difference]: Without dead ends: 152 [2020-10-13 23:45:15,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 23:45:15,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-13 23:45:15,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2020-10-13 23:45:15,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-13 23:45:15,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2020-10-13 23:45:15,655 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 143 [2020-10-13 23:45:15,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:15,656 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2020-10-13 23:45:15,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 23:45:15,656 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2020-10-13 23:45:15,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 23:45:15,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:15,657 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:15,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:45:15,657 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:15,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:15,658 INFO L82 PathProgramCache]: Analyzing trace with hash 637333089, now seen corresponding path program 22 times [2020-10-13 23:45:15,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:15,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350833954] [2020-10-13 23:45:15,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:15,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:15,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:20,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:20,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-13 23:45:20,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:20,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 23:45:20,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:20,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:20,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 23:45:20,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-13 23:45:20,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 23:45:20,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:21,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:21,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:21,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:21,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:21,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:21,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:21,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:21,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:21,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:21,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:21,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:21,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:21,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-10-13 23:45:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:21,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:21,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:21,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:21,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:21,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:45:21,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:21,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:21,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:21,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:21,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:21,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:21,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 2 proven. 961 refuted. 0 times theorem prover too weak. 963 trivial. 0 not checked. [2020-10-13 23:45:21,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350833954] [2020-10-13 23:45:21,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:21,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 23:45:21,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602759007] [2020-10-13 23:45:21,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 23:45:21,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:21,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 23:45:21,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:45:21,361 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 35 states. [2020-10-13 23:45:21,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:21,754 INFO L93 Difference]: Finished difference Result 237 states and 242 transitions. [2020-10-13 23:45:21,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 23:45:21,754 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 147 [2020-10-13 23:45:21,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:21,756 INFO L225 Difference]: With dead ends: 237 [2020-10-13 23:45:21,756 INFO L226 Difference]: Without dead ends: 156 [2020-10-13 23:45:21,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:45:21,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-13 23:45:21,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2020-10-13 23:45:21,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 23:45:21,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2020-10-13 23:45:21,764 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 147 [2020-10-13 23:45:21,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:21,765 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2020-10-13 23:45:21,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 23:45:21,765 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2020-10-13 23:45:21,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 23:45:21,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:21,766 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:21,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:45:21,766 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:21,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:21,767 INFO L82 PathProgramCache]: Analyzing trace with hash -598102819, now seen corresponding path program 23 times [2020-10-13 23:45:21,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:21,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734735205] [2020-10-13 23:45:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:21,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:21,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:26,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:26,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-13 23:45:26,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:26,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-13 23:45:26,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:26,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:26,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 23:45:26,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 23:45:26,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 23:45:26,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:27,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:27,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:27,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:27,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:27,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:27,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:27,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:27,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:27,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:27,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:27,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:27,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:27,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-10-13 23:45:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:27,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:27,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:27,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:27,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:27,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:45:27,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:27,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:27,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:27,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:27,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:27,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2052 backedges. 2 proven. 1024 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2020-10-13 23:45:27,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734735205] [2020-10-13 23:45:27,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:27,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 23:45:27,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721285631] [2020-10-13 23:45:27,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 23:45:27,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:27,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 23:45:27,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:45:27,505 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 36 states. [2020-10-13 23:45:27,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:27,944 INFO L93 Difference]: Finished difference Result 243 states and 248 transitions. [2020-10-13 23:45:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 23:45:27,944 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 151 [2020-10-13 23:45:27,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:27,946 INFO L225 Difference]: With dead ends: 243 [2020-10-13 23:45:27,947 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 23:45:27,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 23:45:27,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 23:45:27,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2020-10-13 23:45:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-13 23:45:27,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2020-10-13 23:45:27,954 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 151 [2020-10-13 23:45:27,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:27,954 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2020-10-13 23:45:27,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 23:45:27,955 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2020-10-13 23:45:27,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 23:45:27,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:27,955 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:27,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:45:27,956 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:27,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:27,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1525695143, now seen corresponding path program 24 times [2020-10-13 23:45:27,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:27,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962770798] [2020-10-13 23:45:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:27,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:28,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:32,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:32,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 23:45:32,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:32,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:45:32,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:32,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:32,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 23:45:32,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-13 23:45:32,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 23:45:32,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:33,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:33,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:33,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:33,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:33,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:33,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:33,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:33,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:33,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:33,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:33,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:33,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:33,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-10-13 23:45:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:33,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:33,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:33,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:33,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:33,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:33,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:33,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:33,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:33,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:33,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:33,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 2 proven. 1089 refuted. 0 times theorem prover too weak. 1091 trivial. 0 not checked. [2020-10-13 23:45:33,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962770798] [2020-10-13 23:45:33,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:33,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 23:45:33,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645058835] [2020-10-13 23:45:33,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 23:45:33,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:33,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 23:45:33,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:45:33,688 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 37 states. [2020-10-13 23:45:34,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:34,146 INFO L93 Difference]: Finished difference Result 249 states and 254 transitions. [2020-10-13 23:45:34,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:45:34,147 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 155 [2020-10-13 23:45:34,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:34,148 INFO L225 Difference]: With dead ends: 249 [2020-10-13 23:45:34,148 INFO L226 Difference]: Without dead ends: 164 [2020-10-13 23:45:34,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 23:45:34,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-13 23:45:34,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2020-10-13 23:45:34,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-13 23:45:34,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 164 transitions. [2020-10-13 23:45:34,156 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 164 transitions. Word has length 155 [2020-10-13 23:45:34,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:34,156 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 164 transitions. [2020-10-13 23:45:34,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 23:45:34,157 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 164 transitions. [2020-10-13 23:45:34,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-13 23:45:34,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:34,158 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:34,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:45:34,158 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:34,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:34,158 INFO L82 PathProgramCache]: Analyzing trace with hash 2108301269, now seen corresponding path program 25 times [2020-10-13 23:45:34,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:34,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394324801] [2020-10-13 23:45:34,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:34,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:34,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:39,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:39,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-13 23:45:39,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:39,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-13 23:45:39,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:39,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:39,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 23:45:39,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 23:45:39,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 23:45:39,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:39,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:39,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:39,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:39,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:39,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:39,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:39,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:39,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:39,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:39,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:39,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:39,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:39,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:39,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-10-13 23:45:39,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:39,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:39,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:39,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:39,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:39,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:45:39,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:39,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:39,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:39,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:39,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:39,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 2 proven. 1156 refuted. 0 times theorem prover too weak. 1158 trivial. 0 not checked. [2020-10-13 23:45:40,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394324801] [2020-10-13 23:45:40,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:40,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 23:45:40,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809858073] [2020-10-13 23:45:40,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 23:45:40,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:40,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 23:45:40,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:45:40,012 INFO L87 Difference]: Start difference. First operand 162 states and 164 transitions. Second operand 38 states. [2020-10-13 23:45:40,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:40,460 INFO L93 Difference]: Finished difference Result 255 states and 260 transitions. [2020-10-13 23:45:40,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 23:45:40,461 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 159 [2020-10-13 23:45:40,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:40,463 INFO L225 Difference]: With dead ends: 255 [2020-10-13 23:45:40,463 INFO L226 Difference]: Without dead ends: 168 [2020-10-13 23:45:40,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:45:40,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-13 23:45:40,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2020-10-13 23:45:40,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-13 23:45:40,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2020-10-13 23:45:40,484 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 159 [2020-10-13 23:45:40,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:40,484 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2020-10-13 23:45:40,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 23:45:40,484 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2020-10-13 23:45:40,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-13 23:45:40,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:40,486 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:40,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:45:40,487 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:40,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:40,487 INFO L82 PathProgramCache]: Analyzing trace with hash 355718225, now seen corresponding path program 26 times [2020-10-13 23:45:40,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:40,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341402522] [2020-10-13 23:45:40,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:40,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:40,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:45,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:45,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-13 23:45:45,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:45,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5092 [2020-10-13 23:45:45,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:45,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:45,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 23:45:45,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-13 23:45:45,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 23:45:45,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:46,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:46,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:46,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:46,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:46,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:46,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:46,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:46,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:46,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:46,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:46,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:46,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:46,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-10-13 23:45:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:46,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:46,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:46,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:46,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:46,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:45:46,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:46,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:46,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:46,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:46,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:46,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2454 backedges. 2 proven. 1225 refuted. 0 times theorem prover too weak. 1227 trivial. 0 not checked. [2020-10-13 23:45:46,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341402522] [2020-10-13 23:45:46,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:46,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 23:45:46,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234661005] [2020-10-13 23:45:46,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 23:45:46,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:46,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 23:45:46,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:45:46,401 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 39 states. [2020-10-13 23:45:46,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:46,872 INFO L93 Difference]: Finished difference Result 261 states and 266 transitions. [2020-10-13 23:45:46,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 23:45:46,872 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 163 [2020-10-13 23:45:46,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:46,874 INFO L225 Difference]: With dead ends: 261 [2020-10-13 23:45:46,874 INFO L226 Difference]: Without dead ends: 172 [2020-10-13 23:45:46,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 23:45:46,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-13 23:45:46,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2020-10-13 23:45:46,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-13 23:45:46,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2020-10-13 23:45:46,889 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 163 [2020-10-13 23:45:46,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:46,890 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2020-10-13 23:45:46,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 23:45:46,890 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2020-10-13 23:45:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-13 23:45:46,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:46,892 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:46,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:45:46,892 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:46,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:46,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1278728909, now seen corresponding path program 27 times [2020-10-13 23:45:46,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:46,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956684687] [2020-10-13 23:45:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:46,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:47,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:52,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:52,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-13 23:45:52,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:52,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5233 [2020-10-13 23:45:52,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:52,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:52,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 23:45:52,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:52,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 23:45:52,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:52,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:52,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:52,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:52,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:52,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:52,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:52,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:52,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:52,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:52,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:52,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:52,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:52,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-10-13 23:45:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:52,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:52,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:52,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:52,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:52,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:45:52,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:52,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:52,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:52,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:52,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:52,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2596 backedges. 2 proven. 1296 refuted. 0 times theorem prover too weak. 1298 trivial. 0 not checked. [2020-10-13 23:45:52,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956684687] [2020-10-13 23:45:52,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:53,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 23:45:53,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31683830] [2020-10-13 23:45:53,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 23:45:53,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:53,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 23:45:53,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:45:53,001 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand 40 states. [2020-10-13 23:45:53,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:53,425 INFO L93 Difference]: Finished difference Result 267 states and 272 transitions. [2020-10-13 23:45:53,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 23:45:53,426 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 167 [2020-10-13 23:45:53,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:53,428 INFO L225 Difference]: With dead ends: 267 [2020-10-13 23:45:53,428 INFO L226 Difference]: Without dead ends: 176 [2020-10-13 23:45:53,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:45:53,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-13 23:45:53,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 174. [2020-10-13 23:45:53,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-13 23:45:53,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2020-10-13 23:45:53,438 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 167 [2020-10-13 23:45:53,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:53,438 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2020-10-13 23:45:53,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 23:45:53,439 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2020-10-13 23:45:53,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 23:45:53,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:53,440 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:53,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:45:53,440 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:53,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:53,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1262406839, now seen corresponding path program 28 times [2020-10-13 23:45:53,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:53,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218096213] [2020-10-13 23:45:53,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:53,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:53,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:58,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:58,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-13 23:45:58,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:45:58,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-13 23:45:58,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:58,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:58,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 23:45:58,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:58,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 23:45:58,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:59,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:59,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:59,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:59,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:59,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:59,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:59,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:59,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:59,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:59,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:59,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:59,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:59,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-10-13 23:45:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:59,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:59,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:59,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:45:59,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:59,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:45:59,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:59,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:59,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:59,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:45:59,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:59,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2742 backedges. 2 proven. 1369 refuted. 0 times theorem prover too weak. 1371 trivial. 0 not checked. [2020-10-13 23:45:59,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218096213] [2020-10-13 23:45:59,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:59,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 23:45:59,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248263402] [2020-10-13 23:45:59,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 23:45:59,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:59,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 23:45:59,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:45:59,400 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand 41 states. [2020-10-13 23:45:59,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:59,794 INFO L93 Difference]: Finished difference Result 273 states and 278 transitions. [2020-10-13 23:45:59,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 23:45:59,795 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 171 [2020-10-13 23:45:59,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:59,796 INFO L225 Difference]: With dead ends: 273 [2020-10-13 23:45:59,796 INFO L226 Difference]: Without dead ends: 180 [2020-10-13 23:45:59,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:45:59,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-13 23:45:59,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2020-10-13 23:45:59,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-13 23:45:59,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2020-10-13 23:45:59,805 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 171 [2020-10-13 23:45:59,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:59,805 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2020-10-13 23:45:59,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 23:45:59,805 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2020-10-13 23:45:59,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-13 23:45:59,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:59,806 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:59,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:45:59,807 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:59,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:59,807 INFO L82 PathProgramCache]: Analyzing trace with hash 307944901, now seen corresponding path program 29 times [2020-10-13 23:45:59,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:59,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284809520] [2020-10-13 23:45:59,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:59,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:59,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:04,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:04,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-13 23:46:04,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:46:04,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-13 23:46:04,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:04,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:04,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 23:46:04,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:04,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 23:46:04,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:05,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:05,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:05,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:05,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:05,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:05,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:05,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:05,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:05,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:05,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:05,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:05,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:05,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-10-13 23:46:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:05,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:05,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:05,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:46:05,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:05,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:46:05,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:05,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:05,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:05,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:46:05,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:05,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:05,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2892 backedges. 2 proven. 1444 refuted. 0 times theorem prover too weak. 1446 trivial. 0 not checked. [2020-10-13 23:46:05,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284809520] [2020-10-13 23:46:05,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:05,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 23:46:05,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289085884] [2020-10-13 23:46:05,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 23:46:05,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:05,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 23:46:05,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:46:05,822 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 42 states. [2020-10-13 23:46:06,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:06,337 INFO L93 Difference]: Finished difference Result 279 states and 284 transitions. [2020-10-13 23:46:06,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 23:46:06,337 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 175 [2020-10-13 23:46:06,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:06,339 INFO L225 Difference]: With dead ends: 279 [2020-10-13 23:46:06,339 INFO L226 Difference]: Without dead ends: 184 [2020-10-13 23:46:06,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 23:46:06,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-13 23:46:06,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2020-10-13 23:46:06,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-13 23:46:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2020-10-13 23:46:06,348 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 175 [2020-10-13 23:46:06,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:06,348 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2020-10-13 23:46:06,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 23:46:06,349 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2020-10-13 23:46:06,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-13 23:46:06,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:06,350 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:06,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:46:06,351 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:06,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:06,351 INFO L82 PathProgramCache]: Analyzing trace with hash -636495295, now seen corresponding path program 30 times [2020-10-13 23:46:06,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:06,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439072804] [2020-10-13 23:46:06,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:06,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:06,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:11,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:11,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-13 23:46:11,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:46:11,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-13 23:46:11,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:11,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:11,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 23:46:11,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 23:46:11,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 23:46:11,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:12,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:12,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:12,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:12,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:12,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:12,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:12,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:12,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:12,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:12,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:12,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:12,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:12,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-10-13 23:46:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:12,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:12,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:12,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:46:12,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:12,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:46:12,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:12,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:12,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:12,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:46:12,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:12,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3046 backedges. 2 proven. 1521 refuted. 0 times theorem prover too weak. 1523 trivial. 0 not checked. [2020-10-13 23:46:12,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439072804] [2020-10-13 23:46:12,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:12,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 23:46:12,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226866599] [2020-10-13 23:46:12,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 23:46:12,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:12,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 23:46:12,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:46:12,408 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 43 states. [2020-10-13 23:46:12,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:12,923 INFO L93 Difference]: Finished difference Result 285 states and 290 transitions. [2020-10-13 23:46:12,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 23:46:12,924 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 179 [2020-10-13 23:46:12,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:12,926 INFO L225 Difference]: With dead ends: 285 [2020-10-13 23:46:12,926 INFO L226 Difference]: Without dead ends: 188 [2020-10-13 23:46:12,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 23:46:12,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-13 23:46:12,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2020-10-13 23:46:12,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-13 23:46:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2020-10-13 23:46:12,937 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 179 [2020-10-13 23:46:12,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:12,937 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2020-10-13 23:46:12,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 23:46:12,938 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2020-10-13 23:46:12,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-13 23:46:12,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:12,939 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:12,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:46:12,939 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:12,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:12,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1301600067, now seen corresponding path program 31 times [2020-10-13 23:46:12,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:12,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742719248] [2020-10-13 23:46:12,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:12,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:13,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:18,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:18,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-13 23:46:18,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:46:18,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5142 [2020-10-13 23:46:18,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:18,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:18,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 23:46:18,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-13 23:46:18,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 23:46:18,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:19,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:19,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:19,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:19,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:19,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:19,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:19,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:19,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:19,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:19,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:19,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:19,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:19,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-10-13 23:46:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:19,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:19,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:19,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:46:19,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:19,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:46:19,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:19,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:19,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:19,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:46:19,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:19,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3204 backedges. 2 proven. 1600 refuted. 0 times theorem prover too weak. 1602 trivial. 0 not checked. [2020-10-13 23:46:19,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742719248] [2020-10-13 23:46:19,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:19,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 23:46:19,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255539761] [2020-10-13 23:46:19,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 23:46:19,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:19,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 23:46:19,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:46:19,114 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand 44 states. [2020-10-13 23:46:19,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:19,651 INFO L93 Difference]: Finished difference Result 291 states and 296 transitions. [2020-10-13 23:46:19,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 23:46:19,652 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 183 [2020-10-13 23:46:19,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:19,653 INFO L225 Difference]: With dead ends: 291 [2020-10-13 23:46:19,654 INFO L226 Difference]: Without dead ends: 192 [2020-10-13 23:46:19,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:46:19,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-13 23:46:19,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2020-10-13 23:46:19,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-13 23:46:19,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2020-10-13 23:46:19,664 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 183 [2020-10-13 23:46:19,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:19,666 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2020-10-13 23:46:19,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 23:46:19,666 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2020-10-13 23:46:19,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-13 23:46:19,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:19,668 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:19,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:46:19,668 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:19,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:19,668 INFO L82 PathProgramCache]: Analyzing trace with hash -210253511, now seen corresponding path program 32 times [2020-10-13 23:46:19,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:19,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135963405] [2020-10-13 23:46:19,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:19,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:24,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:24,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-13 23:46:24,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:24,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5082 [2020-10-13 23:46:24,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:24,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:24,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 23:46:24,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:24,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 23:46:24,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:25,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:25,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:25,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:25,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:25,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:25,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:25,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:25,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:25,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:25,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:25,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:25,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:25,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-10-13 23:46:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:25,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:25,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:25,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:46:25,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:25,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:46:25,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:25,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:25,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:25,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:46:25,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:25,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3366 backedges. 2 proven. 1681 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2020-10-13 23:46:25,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135963405] [2020-10-13 23:46:25,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:25,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 23:46:25,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419113760] [2020-10-13 23:46:25,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 23:46:25,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:25,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 23:46:25,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 23:46:25,823 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 45 states. [2020-10-13 23:46:26,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:26,362 INFO L93 Difference]: Finished difference Result 297 states and 302 transitions. [2020-10-13 23:46:26,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 23:46:26,363 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 187 [2020-10-13 23:46:26,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:26,365 INFO L225 Difference]: With dead ends: 297 [2020-10-13 23:46:26,365 INFO L226 Difference]: Without dead ends: 196 [2020-10-13 23:46:26,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 23:46:26,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-13 23:46:26,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2020-10-13 23:46:26,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-13 23:46:26,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2020-10-13 23:46:26,374 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 187 [2020-10-13 23:46:26,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:26,375 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2020-10-13 23:46:26,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 23:46:26,375 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2020-10-13 23:46:26,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-13 23:46:26,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:26,376 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:26,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 23:46:26,377 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:26,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:26,377 INFO L82 PathProgramCache]: Analyzing trace with hash 650165173, now seen corresponding path program 33 times [2020-10-13 23:46:26,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:26,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683538551] [2020-10-13 23:46:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:26,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:31,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:31,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-13 23:46:31,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:31,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-13 23:46:31,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:31,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:31,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 23:46:31,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:31,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 23:46:31,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:32,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:32,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:32,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:32,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:32,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:32,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:32,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:32,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:32,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:32,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:32,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:32,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:32,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-10-13 23:46:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:32,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:32,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:32,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:46:32,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:32,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:46:32,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:32,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:32,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:32,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 23:46:32,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:32,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3532 backedges. 2 proven. 1764 refuted. 0 times theorem prover too weak. 1766 trivial. 0 not checked. [2020-10-13 23:46:32,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683538551] [2020-10-13 23:46:32,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:32,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 23:46:32,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169559871] [2020-10-13 23:46:32,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 23:46:32,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:32,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 23:46:32,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 23:46:32,529 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand 46 states. [2020-10-13 23:46:33,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:33,080 INFO L93 Difference]: Finished difference Result 303 states and 308 transitions. [2020-10-13 23:46:33,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 23:46:33,080 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 191 [2020-10-13 23:46:33,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:33,082 INFO L225 Difference]: With dead ends: 303 [2020-10-13 23:46:33,082 INFO L226 Difference]: Without dead ends: 200 [2020-10-13 23:46:33,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 23:46:33,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-13 23:46:33,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2020-10-13 23:46:33,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-13 23:46:33,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 200 transitions. [2020-10-13 23:46:33,091 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 200 transitions. Word has length 191 [2020-10-13 23:46:33,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:33,091 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 200 transitions. [2020-10-13 23:46:33,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 23:46:33,091 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 200 transitions. [2020-10-13 23:46:33,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-13 23:46:33,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:33,093 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:33,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 23:46:33,093 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:33,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:33,093 INFO L82 PathProgramCache]: Analyzing trace with hash -2024734671, now seen corresponding path program 34 times [2020-10-13 23:46:33,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:33,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721155793] [2020-10-13 23:46:33,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:33,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:33,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking...