/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_partition_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:42:31,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:42:31,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:42:31,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:42:31,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:42:31,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:42:31,354 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:42:31,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:42:31,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:42:31,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:42:31,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:42:31,364 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:42:31,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:42:31,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:42:31,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:42:31,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:42:31,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:42:31,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:42:31,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:42:31,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:42:31,377 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:42:31,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:42:31,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:42:31,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:42:31,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:42:31,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:42:31,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:42:31,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:42:31,383 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:42:31,384 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:42:31,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:42:31,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:42:31,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:42:31,386 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:42:31,387 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:42:31,387 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:42:31,388 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:42:31,388 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:42:31,388 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:42:31,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:42:31,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:42:31,391 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 23:42:31,413 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:42:31,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:42:31,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:42:31,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:42:31,415 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:42:31,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:42:31,415 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:42:31,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:42:31,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:42:31,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:42:31,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:42:31,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:42:31,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:42:31,416 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:42:31,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:42:31,417 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:42:31,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:42:31,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:42:31,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:42:31,418 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:42:31,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:42:31,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:42:31,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:42:31,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:42:31,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:42:31,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:42:31,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:42:31,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:42:31,419 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:42:31,420 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 23:42:31,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:42:31,768 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:42:31,774 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:42:31,776 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:42:31,777 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:42:31,777 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_ground-2.i [2020-10-13 23:42:31,833 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7edc3b0cb/eada891667de45d5b1be64b0c820ae32/FLAG56ced818e [2020-10-13 23:42:32,256 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:42:32,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_partition_ground-2.i [2020-10-13 23:42:32,264 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7edc3b0cb/eada891667de45d5b1be64b0c820ae32/FLAG56ced818e [2020-10-13 23:42:32,626 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7edc3b0cb/eada891667de45d5b1be64b0c820ae32 [2020-10-13 23:42:32,634 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:42:32,636 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:42:32,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:42:32,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:42:32,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:42:32,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:42:32" (1/1) ... [2020-10-13 23:42:32,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@693a331e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:32, skipping insertion in model container [2020-10-13 23:42:32,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:42:32" (1/1) ... [2020-10-13 23:42:32,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:42:32,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:42:32,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:42:32,863 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:42:32,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:42:32,901 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:42:32,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:32 WrapperNode [2020-10-13 23:42:32,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:42:32,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:42:32,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:42:32,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:42:33,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:32" (1/1) ... [2020-10-13 23:42:33,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:32" (1/1) ... [2020-10-13 23:42:33,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:32" (1/1) ... [2020-10-13 23:42:33,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:32" (1/1) ... [2020-10-13 23:42:33,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:32" (1/1) ... [2020-10-13 23:42:33,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:32" (1/1) ... [2020-10-13 23:42:33,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:32" (1/1) ... [2020-10-13 23:42:33,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:42:33,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:42:33,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:42:33,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:42:33,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:32" (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 23:42:33,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:42:33,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:42:33,095 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:42:33,095 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:42:33,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:42:33,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:42:33,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:42:33,096 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:42:33,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:42:33,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:42:33,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:42:33,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:42:33,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:42:33,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:42:33,390 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:42:33,391 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 23:42:33,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:42:33 BoogieIcfgContainer [2020-10-13 23:42:33,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:42:33,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:42:33,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:42:33,402 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:42:33,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:42:32" (1/3) ... [2020-10-13 23:42:33,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ad9e33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:42:33, skipping insertion in model container [2020-10-13 23:42:33,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:42:32" (2/3) ... [2020-10-13 23:42:33,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ad9e33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:42:33, skipping insertion in model container [2020-10-13 23:42:33,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:42:33" (3/3) ... [2020-10-13 23:42:33,405 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2020-10-13 23:42:33,414 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:42:33,420 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:42:33,431 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:42:33,449 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:42:33,449 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:42:33,449 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:42:33,450 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:42:33,450 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:42:33,450 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:42:33,450 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:42:33,450 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:42:33,469 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-13 23:42:33,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 23:42:33,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:33,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:33,476 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:33,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:33,480 INFO L82 PathProgramCache]: Analyzing trace with hash -640162803, now seen corresponding path program 1 times [2020-10-13 23:42:33,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:33,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265168821] [2020-10-13 23:42:33,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:33,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:33,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:33,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:33,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:33,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:33,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 23:42:33,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:42:33,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-13 23:42:33,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:33,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:33,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:33,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 23:42:33,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:33,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:42:34,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:34,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:34,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:34,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:34,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:34,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:34,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:42:34,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:34,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:34,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:34,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:34,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:34,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:42:34,067 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 23:42:34,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265168821] [2020-10-13 23:42:34,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:42:34,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:42:34,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606713832] [2020-10-13 23:42:34,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:42:34,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:34,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:42:34,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:42:34,091 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-10-13 23:42:34,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:34,191 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2020-10-13 23:42:34,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:42:34,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-13 23:42:34,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:34,202 INFO L225 Difference]: With dead ends: 54 [2020-10-13 23:42:34,203 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 23:42:34,207 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 23:42:34,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 23:42:34,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-13 23:42:34,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 23:42:34,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-13 23:42:34,246 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2020-10-13 23:42:34,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:34,247 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-13 23:42:34,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:42:34,247 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-13 23:42:34,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 23:42:34,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:34,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:34,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:42:34,249 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:34,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:34,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2068442237, now seen corresponding path program 1 times [2020-10-13 23:42:34,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:34,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862646527] [2020-10-13 23:42:34,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:34,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:34,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:34,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:34,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:34,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:34,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 23:42:34,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:42:34,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-13 23:42:34,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:34,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:34,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:42:34,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:34,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 23:42:34,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 23:42:34,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:34,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:34,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:34,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:34,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:34,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:42:34,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:34,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:34,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:34,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:34,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:34,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:34,650 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 23:42:34,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862646527] [2020-10-13 23:42:34,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:42:34,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:42:34,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228712706] [2020-10-13 23:42:34,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:42:34,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:34,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:42:34,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:42:34,657 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2020-10-13 23:42:34,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:34,773 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-10-13 23:42:34,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:42:34,774 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 23:42:34,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:34,775 INFO L225 Difference]: With dead ends: 47 [2020-10-13 23:42:34,775 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 23:42:34,776 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 23:42:34,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 23:42:34,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-10-13 23:42:34,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 23:42:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-13 23:42:34,784 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 16 [2020-10-13 23:42:34,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:34,784 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-13 23:42:34,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:42:34,785 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-13 23:42:34,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 23:42:34,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:34,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:34,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:42:34,786 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:34,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:34,787 INFO L82 PathProgramCache]: Analyzing trace with hash 367201763, now seen corresponding path program 1 times [2020-10-13 23:42:34,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:34,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038645928] [2020-10-13 23:42:34,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:34,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:34,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:34,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:34,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:35,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:35,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:36,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:36,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 23:42:36,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:42:36,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1476 [2020-10-13 23:42:36,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:36,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:36,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:42:36,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:36,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:42:36,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:36,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:36,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:36,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:36,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:36,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:36,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:42:36,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:36,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:36,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:36,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:36,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:36,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:42:36,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038645928] [2020-10-13 23:42:36,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:42:36,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:42:36,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595351387] [2020-10-13 23:42:36,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:42:36,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:36,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:42:36,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:42:36,316 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2020-10-13 23:42:36,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:36,399 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-10-13 23:42:36,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:42:36,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-13 23:42:36,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:36,401 INFO L225 Difference]: With dead ends: 50 [2020-10-13 23:42:36,401 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 23:42:36,402 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 23:42:36,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 23:42:36,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-13 23:42:36,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 23:42:36,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-13 23:42:36,412 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 22 [2020-10-13 23:42:36,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:36,412 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-13 23:42:36,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:42:36,413 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-13 23:42:36,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 23:42:36,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:36,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:36,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:42:36,416 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:36,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:36,416 INFO L82 PathProgramCache]: Analyzing trace with hash -45207547, now seen corresponding path program 1 times [2020-10-13 23:42:36,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:36,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661142852] [2020-10-13 23:42:36,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:36,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:36,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:36,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:36,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:36,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:37,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:39,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:39,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 23:42:39,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:42:39,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2836 [2020-10-13 23:42:39,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:39,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:39,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:42:39,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:39,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:42:39,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:39,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:39,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:39,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:39,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:39,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:39,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:42:39,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:39,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:39,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:39,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:39,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:39,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:42:39,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661142852] [2020-10-13 23:42:39,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:39,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:42:39,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691046253] [2020-10-13 23:42:39,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:42:39,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:39,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:42:39,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:42:39,319 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2020-10-13 23:42:39,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:39,414 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2020-10-13 23:42:39,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:42:39,415 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-13 23:42:39,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:39,416 INFO L225 Difference]: With dead ends: 55 [2020-10-13 23:42:39,416 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 23:42:39,417 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 23:42:39,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 23:42:39,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-10-13 23:42:39,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 23:42:39,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2020-10-13 23:42:39,424 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 24 [2020-10-13 23:42:39,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:39,424 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2020-10-13 23:42:39,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:42:39,424 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2020-10-13 23:42:39,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:42:39,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:39,426 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:39,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:42:39,426 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:39,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:39,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1839316897, now seen corresponding path program 2 times [2020-10-13 23:42:39,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:39,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706405938] [2020-10-13 23:42:39,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:39,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:39,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:39,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:39,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:39,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:39,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:39,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:43,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:44,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:44,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 23:42:44,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:42:44,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:42:44,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:44,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:44,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:42:44,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:44,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 23:42:44,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:44,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:44,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:44,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:44,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:44,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:44,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:42:44,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:44,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:44,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:44,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:44,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:44,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:42:44,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706405938] [2020-10-13 23:42:44,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:44,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:42:44,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447127127] [2020-10-13 23:42:44,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:42:44,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:44,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:42:44,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:42:44,511 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 6 states. [2020-10-13 23:42:44,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:44,641 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2020-10-13 23:42:44,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:42:44,642 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-13 23:42:44,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:44,643 INFO L225 Difference]: With dead ends: 64 [2020-10-13 23:42:44,643 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 23:42:44,644 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 23:42:44,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 23:42:44,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-10-13 23:42:44,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 23:42:44,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-10-13 23:42:44,657 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 30 [2020-10-13 23:42:44,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:44,657 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-10-13 23:42:44,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:42:44,657 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-10-13 23:42:44,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 23:42:44,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:44,658 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:44,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:42:44,659 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:44,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:44,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1701848123, now seen corresponding path program 3 times [2020-10-13 23:42:44,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:44,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271032330] [2020-10-13 23:42:44,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:44,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:44,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:44,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:44,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:44,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:45,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:49,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:49,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 23:42:49,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:42:49,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:42:49,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:49,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:49,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:42:49,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:49,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:42:49,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:49,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:49,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:49,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:49,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:49,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:49,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:42:49,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:49,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:49,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:49,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:49,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:49,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:42:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-13 23:42:49,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271032330] [2020-10-13 23:42:49,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:49,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:42:49,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845075553] [2020-10-13 23:42:49,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:42:49,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:49,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:42:49,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:42:49,721 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 5 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 76 states and 94 transitions. [2020-10-13 23:42:49,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:42:49,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-10-13 23:42:49,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:49,801 INFO L225 Difference]: With dead ends: 76 [2020-10-13 23:42:49,801 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 23:42:49,803 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 23:42:49,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 23:42:49,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-13 23:42:49,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 23:42:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-10-13 23:42:49,814 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 36 [2020-10-13 23:42:49,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:49,815 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-10-13 23:42:49,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:42:49,815 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-10-13 23:42:49,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 23:42:49,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:49,818 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:49,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:42:49,819 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:49,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:49,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1107584409, now seen corresponding path program 4 times [2020-10-13 23:42:49,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:49,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344418334] [2020-10-13 23:42:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:49,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:49,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:49,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:49,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:50,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:50,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:50,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:51,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:54,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:54,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:54,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 23:42:54,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:42:54,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:42:54,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:54,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:42:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:42:54,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:42:54,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:54,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:42:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:54,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:54,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:42:54,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:42:54,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:42:54,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:42:54,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:42:54,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:42:54,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:42:54,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:42:54,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:42:54,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:42:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 23:42:54,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344418334] [2020-10-13 23:42:54,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:42:54,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:42:54,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308950068] [2020-10-13 23:42:54,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:42:54,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:42:54,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:42:54,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:42:54,923 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 7 states. [2020-10-13 23:42:55,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:42:55,067 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2020-10-13 23:42:55,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:42:55,068 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-13 23:42:55,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:42:55,069 INFO L225 Difference]: With dead ends: 75 [2020-10-13 23:42:55,069 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 23:42:55,071 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 23:42:55,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 23:42:55,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-10-13 23:42:55,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 23:42:55,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2020-10-13 23:42:55,085 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 38 [2020-10-13 23:42:55,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:42:55,085 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2020-10-13 23:42:55,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:42:55,085 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2020-10-13 23:42:55,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 23:42:55,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:42:55,086 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:42:55,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:42:55,087 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:42:55,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:42:55,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1668464065, now seen corresponding path program 5 times [2020-10-13 23:42:55,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:42:55,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903458603] [2020-10-13 23:42:55,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:42:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:42:55,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:55,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:55,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:55,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:55,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:55,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:56,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:57,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:57,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:57,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:57,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:58,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:58,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:59,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:59,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:42:59,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:00,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:00,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:00,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 23:43:00,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 23:43:00,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:43:00,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:00,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:00,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:43:00,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:00,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:43:00,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:00,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:00,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:00,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:00,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:00,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:00,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:00,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:00,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:00,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:00,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:00,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:00,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-13 23:43:00,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903458603] [2020-10-13 23:43:00,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:00,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:43:00,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011100280] [2020-10-13 23:43:00,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:43:00,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:00,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:43:00,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:43:00,180 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand 6 states. [2020-10-13 23:43:00,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:00,293 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2020-10-13 23:43:00,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:43:00,294 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-13 23:43:00,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:00,296 INFO L225 Difference]: With dead ends: 90 [2020-10-13 23:43:00,296 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 23:43:00,299 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 23:43:00,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 23:43:00,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-13 23:43:00,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 23:43:00,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2020-10-13 23:43:00,324 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 44 [2020-10-13 23:43:00,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:00,325 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2020-10-13 23:43:00,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:43:00,325 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2020-10-13 23:43:00,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 23:43:00,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:00,329 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:00,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:43:00,330 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:00,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:00,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1987134877, now seen corresponding path program 6 times [2020-10-13 23:43:00,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:00,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070073597] [2020-10-13 23:43:00,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:00,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:00,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:00,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:00,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:01,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:01,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:05,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:05,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:43:05,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:43:05,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:43:05,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:05,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:05,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:43:05,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:05,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 23:43:05,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:05,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:05,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:05,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:05,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:05,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:05,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:05,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:05,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:05,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:05,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:05,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:05,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-13 23:43:05,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070073597] [2020-10-13 23:43:05,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:05,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:43:05,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621440091] [2020-10-13 23:43:05,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:43:05,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:05,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:43:05,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:43:05,446 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 8 states. [2020-10-13 23:43:05,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:05,589 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2020-10-13 23:43:05,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:43:05,590 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-10-13 23:43:05,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:05,591 INFO L225 Difference]: With dead ends: 86 [2020-10-13 23:43:05,591 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 23:43:05,592 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 23:43:05,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 23:43:05,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-10-13 23:43:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 23:43:05,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-10-13 23:43:05,603 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 46 [2020-10-13 23:43:05,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:05,606 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-10-13 23:43:05,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:43:05,607 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-10-13 23:43:05,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:43:05,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:05,608 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:05,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:43:05,608 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:05,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:05,608 INFO L82 PathProgramCache]: Analyzing trace with hash 974753353, now seen corresponding path program 7 times [2020-10-13 23:43:05,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:05,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650885312] [2020-10-13 23:43:05,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:05,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:05,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:05,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:05,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:06,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:06,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:07,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:07,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:08,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:08,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:08,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:09,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:09,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:09,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:10,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:10,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:10,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:10,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:43:10,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 23:43:10,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:43:10,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:10,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:10,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:43:10,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 23:43:10,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:43:10,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:10,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:10,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:10,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:10,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:10,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:10,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:10,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:10,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:10,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:10,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:10,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:10,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-10-13 23:43:10,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650885312] [2020-10-13 23:43:10,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:10,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:43:10,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314382434] [2020-10-13 23:43:10,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:43:10,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:10,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:43:10,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:43:10,700 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 9 states. [2020-10-13 23:43:10,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:10,840 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2020-10-13 23:43:10,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:43:10,841 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2020-10-13 23:43:10,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:10,842 INFO L225 Difference]: With dead ends: 95 [2020-10-13 23:43:10,842 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 23:43:10,843 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 23:43:10,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 23:43:10,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2020-10-13 23:43:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 23:43:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2020-10-13 23:43:10,849 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 52 [2020-10-13 23:43:10,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:10,849 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2020-10-13 23:43:10,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:43:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2020-10-13 23:43:10,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 23:43:10,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:10,851 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:10,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:43:10,851 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:10,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:10,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2087535779, now seen corresponding path program 8 times [2020-10-13 23:43:10,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:10,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115582788] [2020-10-13 23:43:10,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:10,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:10,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:10,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:10,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:11,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:11,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:15,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:15,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 23:43:15,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:43:15,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:43:15,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:15,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:15,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:43:15,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:15,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:43:15,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:15,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:15,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:15,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:15,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:15,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:15,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:15,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:15,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:15,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:15,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:15,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:15,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-13 23:43:15,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115582788] [2020-10-13 23:43:15,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:15,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:43:15,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266178031] [2020-10-13 23:43:15,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:43:15,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:15,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:43:15,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:43:15,926 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand 7 states. [2020-10-13 23:43:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:15,999 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2020-10-13 23:43:15,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:43:16,000 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2020-10-13 23:43:16,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:16,001 INFO L225 Difference]: With dead ends: 116 [2020-10-13 23:43:16,001 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 23:43:16,002 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 23:43:16,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 23:43:16,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-13 23:43:16,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 23:43:16,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2020-10-13 23:43:16,007 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 58 [2020-10-13 23:43:16,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:16,008 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2020-10-13 23:43:16,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:43:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2020-10-13 23:43:16,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 23:43:16,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:16,009 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:16,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:43:16,009 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:16,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:16,010 INFO L82 PathProgramCache]: Analyzing trace with hash 817462725, now seen corresponding path program 9 times [2020-10-13 23:43:16,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:16,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686987749] [2020-10-13 23:43:16,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:16,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:16,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:16,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:16,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:16,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:17,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:17,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:21,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:21,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 23:43:21,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:43:21,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:43:21,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:21,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:21,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:43:21,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:21,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 23:43:21,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:21,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:21,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:21,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:21,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:21,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:21,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:21,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:21,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:21,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:21,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:21,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:21,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-10-13 23:43:21,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686987749] [2020-10-13 23:43:21,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:21,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:43:21,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525499382] [2020-10-13 23:43:21,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:43:21,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:21,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:43:21,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:43:21,123 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand 10 states. [2020-10-13 23:43:21,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:21,275 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2020-10-13 23:43:21,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:43:21,275 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-13 23:43:21,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:21,276 INFO L225 Difference]: With dead ends: 106 [2020-10-13 23:43:21,276 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 23:43:21,277 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 23:43:21,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 23:43:21,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2020-10-13 23:43:21,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 23:43:21,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2020-10-13 23:43:21,292 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 60 [2020-10-13 23:43:21,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:21,293 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2020-10-13 23:43:21,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:43:21,293 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2020-10-13 23:43:21,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:43:21,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:21,294 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:21,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:43:21,298 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:21,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:21,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1889145941, now seen corresponding path program 10 times [2020-10-13 23:43:21,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:21,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000372963] [2020-10-13 23:43:21,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:21,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:21,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:21,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:22,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:22,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:23,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:23,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:24,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:24,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:24,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:25,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:25,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:26,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:26,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 23:43:26,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:43:26,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:43:26,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:26,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:26,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:43:26,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:26,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:43:26,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:26,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:26,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:26,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:26,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:26,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:26,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:26,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:26,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:26,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:26,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:26,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:26,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-13 23:43:26,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000372963] [2020-10-13 23:43:26,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:26,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:43:26,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237353528] [2020-10-13 23:43:26,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:43:26,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:26,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:43:26,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:43:26,383 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand 8 states. [2020-10-13 23:43:26,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:26,469 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2020-10-13 23:43:26,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:43:26,469 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-10-13 23:43:26,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:26,470 INFO L225 Difference]: With dead ends: 130 [2020-10-13 23:43:26,470 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 23:43:26,471 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 23:43:26,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 23:43:26,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-13 23:43:26,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 23:43:26,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2020-10-13 23:43:26,476 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 66 [2020-10-13 23:43:26,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:26,476 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2020-10-13 23:43:26,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:43:26,476 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2020-10-13 23:43:26,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 23:43:26,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:26,477 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:26,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:43:26,478 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:26,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:26,478 INFO L82 PathProgramCache]: Analyzing trace with hash 629138125, now seen corresponding path program 11 times [2020-10-13 23:43:26,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:26,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430191325] [2020-10-13 23:43:26,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:26,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:26,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:26,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:26,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:26,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:26,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:31,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:31,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 23:43:31,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:43:31,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:43:31,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:31,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:31,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:43:31,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:31,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:43:31,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:31,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:31,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:31,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:31,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:31,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:31,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:31,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:31,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:31,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:31,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:31,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:31,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:31,580 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-10-13 23:43:31,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430191325] [2020-10-13 23:43:31,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:31,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:43:31,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624717693] [2020-10-13 23:43:31,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:43:31,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:31,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:43:31,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:43:31,582 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand 11 states. [2020-10-13 23:43:31,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:31,746 INFO L93 Difference]: Finished difference Result 117 states and 148 transitions. [2020-10-13 23:43:31,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:43:31,746 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-10-13 23:43:31,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:31,748 INFO L225 Difference]: With dead ends: 117 [2020-10-13 23:43:31,748 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 23:43:31,749 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 23:43:31,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 23:43:31,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2020-10-13 23:43:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 23:43:31,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2020-10-13 23:43:31,753 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 68 [2020-10-13 23:43:31,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:31,754 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2020-10-13 23:43:31,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:43:31,754 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2020-10-13 23:43:31,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 23:43:31,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:31,755 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:31,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:43:31,755 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:31,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:31,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1715189081, now seen corresponding path program 12 times [2020-10-13 23:43:31,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:31,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11563282] [2020-10-13 23:43:31,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:31,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:31,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:31,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:31,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:31,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:31,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:36,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:36,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 23:43:36,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:43:36,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:43:36,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:36,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:36,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:43:36,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:36,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:43:36,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:36,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:36,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:36,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:36,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:36,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:36,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:43:36,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:36,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:36,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:36,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:36,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:36,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-10-13 23:43:36,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11563282] [2020-10-13 23:43:36,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:36,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:43:36,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105192961] [2020-10-13 23:43:36,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:43:36,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:36,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:43:36,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:43:36,832 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand 9 states. [2020-10-13 23:43:36,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:36,925 INFO L93 Difference]: Finished difference Result 144 states and 182 transitions. [2020-10-13 23:43:36,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:43:36,926 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2020-10-13 23:43:36,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:36,927 INFO L225 Difference]: With dead ends: 144 [2020-10-13 23:43:36,927 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 23:43:36,928 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 23:43:36,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 23:43:36,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-13 23:43:36,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 23:43:36,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2020-10-13 23:43:36,932 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 74 [2020-10-13 23:43:36,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:36,933 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2020-10-13 23:43:36,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:43:36,933 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2020-10-13 23:43:36,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 23:43:36,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:36,934 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:36,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:43:36,934 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:36,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:36,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1089601591, now seen corresponding path program 13 times [2020-10-13 23:43:36,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:36,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399419975] [2020-10-13 23:43:36,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:36,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:36,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:37,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:37,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:37,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:37,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:38,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:41,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:41,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 23:43:41,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:43:41,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:43:41,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:41,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:41,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:43:41,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:41,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 23:43:41,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:42,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:42,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:42,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:42,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:42,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:42,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:43:42,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:42,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:42,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:42,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:42,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:42,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-13 23:43:42,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399419975] [2020-10-13 23:43:42,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:42,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:43:42,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269721088] [2020-10-13 23:43:42,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:43:42,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:42,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:43:42,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:43:42,078 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand 12 states. [2020-10-13 23:43:42,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:42,297 INFO L93 Difference]: Finished difference Result 128 states and 162 transitions. [2020-10-13 23:43:42,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:43:42,297 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2020-10-13 23:43:42,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:42,298 INFO L225 Difference]: With dead ends: 128 [2020-10-13 23:43:42,298 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 23:43:42,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:43:42,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 23:43:42,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2020-10-13 23:43:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 23:43:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2020-10-13 23:43:42,306 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 76 [2020-10-13 23:43:42,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:42,308 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2020-10-13 23:43:42,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:43:42,308 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2020-10-13 23:43:42,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 23:43:42,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:42,309 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:42,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:43:42,309 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:42,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:42,310 INFO L82 PathProgramCache]: Analyzing trace with hash -2011666897, now seen corresponding path program 14 times [2020-10-13 23:43:42,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:42,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698452626] [2020-10-13 23:43:42,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:42,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:42,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:42,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:42,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:42,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:43,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:47,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:47,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 23:43:47,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:43:47,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:43:47,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:47,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:47,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:43:47,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:47,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:43:47,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:47,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:47,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:47,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:47,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:47,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:47,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:47,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:47,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:47,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:47,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:47,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:47,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:43:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-10-13 23:43:47,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698452626] [2020-10-13 23:43:47,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:47,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:43:47,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415931467] [2020-10-13 23:43:47,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:43:47,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:47,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:43:47,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:43:47,458 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand 13 states. [2020-10-13 23:43:47,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:47,662 INFO L93 Difference]: Finished difference Result 137 states and 174 transitions. [2020-10-13 23:43:47,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:43:47,662 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-10-13 23:43:47,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:47,663 INFO L225 Difference]: With dead ends: 137 [2020-10-13 23:43:47,663 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 23:43:47,664 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 23:43:47,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 23:43:47,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2020-10-13 23:43:47,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 23:43:47,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 116 transitions. [2020-10-13 23:43:47,671 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 116 transitions. Word has length 82 [2020-10-13 23:43:47,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:47,671 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 116 transitions. [2020-10-13 23:43:47,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:43:47,671 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 116 transitions. [2020-10-13 23:43:47,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 23:43:47,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:47,673 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:47,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:43:47,673 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:47,673 INFO L82 PathProgramCache]: Analyzing trace with hash 2009923849, now seen corresponding path program 15 times [2020-10-13 23:43:47,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:47,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684471595] [2020-10-13 23:43:47,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:47,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:47,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:47,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:47,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:47,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:49,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:49,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:52,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:52,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-13 23:43:52,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:43:52,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:43:52,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:52,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:52,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:43:52,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:52,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:43:52,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:52,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:52,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:52,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:52,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:52,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:52,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:52,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:52,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:52,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:52,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:52,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:52,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-10-13 23:43:52,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684471595] [2020-10-13 23:43:52,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:52,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:43:52,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626428495] [2020-10-13 23:43:52,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:43:52,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:52,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:43:52,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:43:52,778 INFO L87 Difference]: Start difference. First operand 93 states and 116 transitions. Second operand 10 states. [2020-10-13 23:43:52,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:52,884 INFO L93 Difference]: Finished difference Result 170 states and 216 transitions. [2020-10-13 23:43:52,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:43:52,884 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 88 [2020-10-13 23:43:52,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:52,885 INFO L225 Difference]: With dead ends: 170 [2020-10-13 23:43:52,885 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 23:43:52,886 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 23:43:52,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 23:43:52,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-13 23:43:52,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 23:43:52,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2020-10-13 23:43:52,891 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 88 [2020-10-13 23:43:52,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:52,892 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2020-10-13 23:43:52,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:43:52,892 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2020-10-13 23:43:52,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 23:43:52,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:52,893 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:52,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:43:52,893 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:52,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:52,893 INFO L82 PathProgramCache]: Analyzing trace with hash 983175851, now seen corresponding path program 16 times [2020-10-13 23:43:52,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:52,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239649773] [2020-10-13 23:43:52,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:52,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:52,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:52,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:53,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:53,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:54,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:55,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:57,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:57,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 23:43:57,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:43:57,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:43:57,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:57,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:57,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:43:57,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:43:57,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 23:43:57,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:58,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:43:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:58,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:58,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:43:58,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:43:58,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:43:58,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:43:58,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:43:58,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:43:58,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:43:58,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:43:58,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:43:58,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:43:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-10-13 23:43:58,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239649773] [2020-10-13 23:43:58,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:43:58,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:43:58,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542816104] [2020-10-13 23:43:58,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:43:58,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:43:58,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:43:58,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:43:58,044 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand 14 states. [2020-10-13 23:43:58,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:43:58,241 INFO L93 Difference]: Finished difference Result 148 states and 188 transitions. [2020-10-13 23:43:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:43:58,241 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 90 [2020-10-13 23:43:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:43:58,242 INFO L225 Difference]: With dead ends: 148 [2020-10-13 23:43:58,243 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 23:43:58,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 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 23:43:58,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 23:43:58,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2020-10-13 23:43:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 23:43:58,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 126 transitions. [2020-10-13 23:43:58,249 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 126 transitions. Word has length 90 [2020-10-13 23:43:58,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:43:58,249 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 126 transitions. [2020-10-13 23:43:58,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:43:58,249 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 126 transitions. [2020-10-13 23:43:58,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 23:43:58,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:43:58,253 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:43:58,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:43:58,254 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:43:58,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:43:58,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1149711121, now seen corresponding path program 17 times [2020-10-13 23:43:58,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:43:58,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384311012] [2020-10-13 23:43:58,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:43:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:43:58,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:58,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:58,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:58,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:58,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:43:58,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:03,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:03,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 23:44:03,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:44:03,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:44:03,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:03,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:03,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:44:03,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:03,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:44:03,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:03,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:03,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:03,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:03,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:03,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:03,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:03,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:03,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:03,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:03,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:03,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:03,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:03,359 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2020-10-13 23:44:03,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384311012] [2020-10-13 23:44:03,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:03,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:44:03,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273853767] [2020-10-13 23:44:03,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:44:03,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:03,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:44:03,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:44:03,361 INFO L87 Difference]: Start difference. First operand 101 states and 126 transitions. Second operand 11 states. [2020-10-13 23:44:03,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:03,440 INFO L93 Difference]: Finished difference Result 184 states and 234 transitions. [2020-10-13 23:44:03,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:44:03,440 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 96 [2020-10-13 23:44:03,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:03,441 INFO L225 Difference]: With dead ends: 184 [2020-10-13 23:44:03,441 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 23:44:03,442 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 23:44:03,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 23:44:03,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-13 23:44:03,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 23:44:03,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2020-10-13 23:44:03,451 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 96 [2020-10-13 23:44:03,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:03,452 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2020-10-13 23:44:03,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:44:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2020-10-13 23:44:03,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 23:44:03,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:03,453 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:03,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:44:03,453 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:03,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:03,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1224835763, now seen corresponding path program 18 times [2020-10-13 23:44:03,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:03,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258250650] [2020-10-13 23:44:03,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:03,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:03,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:03,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:03,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:03,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:04,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:08,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:08,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 23:44:08,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:44:08,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:44:08,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:08,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:08,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:44:08,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:08,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 23:44:08,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:08,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:08,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:08,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:08,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:08,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:08,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:44:08,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:08,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:08,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:08,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:08,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:08,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-10-13 23:44:08,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258250650] [2020-10-13 23:44:08,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:08,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:44:08,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613847400] [2020-10-13 23:44:08,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:44:08,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:08,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:44:08,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:44:08,608 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 15 states. [2020-10-13 23:44:08,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:08,822 INFO L93 Difference]: Finished difference Result 159 states and 202 transitions. [2020-10-13 23:44:08,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:44:08,822 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 98 [2020-10-13 23:44:08,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:08,824 INFO L225 Difference]: With dead ends: 159 [2020-10-13 23:44:08,824 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 23:44:08,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 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 23:44:08,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 23:44:08,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2020-10-13 23:44:08,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 23:44:08,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 136 transitions. [2020-10-13 23:44:08,830 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 136 transitions. Word has length 98 [2020-10-13 23:44:08,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:08,830 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 136 transitions. [2020-10-13 23:44:08,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:44:08,830 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 136 transitions. [2020-10-13 23:44:08,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 23:44:08,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:08,832 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:08,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:44:08,832 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:08,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:08,832 INFO L82 PathProgramCache]: Analyzing trace with hash 677252877, now seen corresponding path program 19 times [2020-10-13 23:44:08,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:08,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413936008] [2020-10-13 23:44:08,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:08,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:08,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:08,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:08,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:09,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:09,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:10,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:13,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:13,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 23:44:13,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:44:13,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:44:13,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:13,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:13,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:44:13,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:13,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 23:44:13,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:13,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:13,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:13,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:13,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:13,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:13,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:13,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:13,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:13,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:13,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:13,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:13,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2020-10-13 23:44:13,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413936008] [2020-10-13 23:44:13,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:13,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:44:13,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491694436] [2020-10-13 23:44:13,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:44:13,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:13,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:44:13,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:44:13,990 INFO L87 Difference]: Start difference. First operand 109 states and 136 transitions. Second operand 16 states. [2020-10-13 23:44:14,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:14,182 INFO L93 Difference]: Finished difference Result 168 states and 214 transitions. [2020-10-13 23:44:14,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:44:14,184 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 104 [2020-10-13 23:44:14,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:14,185 INFO L225 Difference]: With dead ends: 168 [2020-10-13 23:44:14,185 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 23:44:14,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 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 23:44:14,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 23:44:14,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2020-10-13 23:44:14,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 23:44:14,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 144 transitions. [2020-10-13 23:44:14,191 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 144 transitions. Word has length 104 [2020-10-13 23:44:14,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:14,192 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 144 transitions. [2020-10-13 23:44:14,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:44:14,192 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 144 transitions. [2020-10-13 23:44:14,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 23:44:14,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:14,193 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:14,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:44:14,193 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:14,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:14,193 INFO L82 PathProgramCache]: Analyzing trace with hash -2093340301, now seen corresponding path program 20 times [2020-10-13 23:44:14,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:14,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888461270] [2020-10-13 23:44:14,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:14,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:14,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:14,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:14,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:14,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:15,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:15,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:19,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:19,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 23:44:19,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:44:19,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:44:19,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:19,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:19,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:44:19,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:19,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:44:19,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:19,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:19,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:19,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:19,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:19,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:19,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:19,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:19,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:19,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:19,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:19,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:19,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2020-10-13 23:44:19,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888461270] [2020-10-13 23:44:19,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:19,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:44:19,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103619244] [2020-10-13 23:44:19,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:44:19,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:19,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:44:19,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:44:19,301 INFO L87 Difference]: Start difference. First operand 115 states and 144 transitions. Second operand 12 states. [2020-10-13 23:44:19,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:19,407 INFO L93 Difference]: Finished difference Result 210 states and 268 transitions. [2020-10-13 23:44:19,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:44:19,408 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 110 [2020-10-13 23:44:19,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:19,409 INFO L225 Difference]: With dead ends: 210 [2020-10-13 23:44:19,409 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 23:44:19,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:44:19,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 23:44:19,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-13 23:44:19,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 23:44:19,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 146 transitions. [2020-10-13 23:44:19,415 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 146 transitions. Word has length 110 [2020-10-13 23:44:19,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:19,416 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 146 transitions. [2020-10-13 23:44:19,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:44:19,416 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 146 transitions. [2020-10-13 23:44:19,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 23:44:19,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:19,417 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:19,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:44:19,417 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:19,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:19,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1126730347, now seen corresponding path program 21 times [2020-10-13 23:44:19,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:19,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748101818] [2020-10-13 23:44:19,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:19,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:19,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:19,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:19,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:19,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:23,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:23,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:23,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:24,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:24,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 23:44:24,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:44:24,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:44:24,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:24,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:44:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:24,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 23:44:24,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:24,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:24,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:24,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:24,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:24,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:24,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:24,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:24,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:24,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:24,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:24,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:24,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2020-10-13 23:44:24,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748101818] [2020-10-13 23:44:24,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:24,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:44:24,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825319903] [2020-10-13 23:44:24,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:44:24,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:24,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:44:24,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:44:24,602 INFO L87 Difference]: Start difference. First operand 117 states and 146 transitions. Second operand 17 states. [2020-10-13 23:44:24,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:24,811 INFO L93 Difference]: Finished difference Result 179 states and 228 transitions. [2020-10-13 23:44:24,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:44:24,812 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 112 [2020-10-13 23:44:24,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:24,814 INFO L225 Difference]: With dead ends: 179 [2020-10-13 23:44:24,814 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 23:44:24,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 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 23:44:24,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 23:44:24,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2020-10-13 23:44:24,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 23:44:24,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 154 transitions. [2020-10-13 23:44:24,821 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 154 transitions. Word has length 112 [2020-10-13 23:44:24,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:24,821 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 154 transitions. [2020-10-13 23:44:24,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:44:24,821 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 154 transitions. [2020-10-13 23:44:24,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 23:44:24,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:24,823 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:24,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:44:24,823 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:24,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:24,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1364208401, now seen corresponding path program 22 times [2020-10-13 23:44:24,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:24,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450132113] [2020-10-13 23:44:24,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:24,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:24,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:24,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:25,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:25,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:27,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:29,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:29,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 23:44:29,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:44:29,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:44:29,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:29,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:29,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:44:29,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:29,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:44:29,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:29,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:29,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:29,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:29,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:29,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:29,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:29,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:29,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:29,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:29,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:29,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:29,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2020-10-13 23:44:29,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450132113] [2020-10-13 23:44:29,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:29,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:44:29,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171761699] [2020-10-13 23:44:29,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:44:29,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:29,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:44:29,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:44:29,947 INFO L87 Difference]: Start difference. First operand 123 states and 154 transitions. Second operand 13 states. [2020-10-13 23:44:30,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:30,039 INFO L93 Difference]: Finished difference Result 224 states and 286 transitions. [2020-10-13 23:44:30,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:44:30,040 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 118 [2020-10-13 23:44:30,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:30,041 INFO L225 Difference]: With dead ends: 224 [2020-10-13 23:44:30,042 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 23:44:30,042 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 23:44:30,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 23:44:30,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-13 23:44:30,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-13 23:44:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 156 transitions. [2020-10-13 23:44:30,047 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 156 transitions. Word has length 118 [2020-10-13 23:44:30,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:30,048 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 156 transitions. [2020-10-13 23:44:30,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:44:30,048 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 156 transitions. [2020-10-13 23:44:30,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 23:44:30,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:30,049 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:30,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:44:30,049 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:30,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:30,050 INFO L82 PathProgramCache]: Analyzing trace with hash -44572911, now seen corresponding path program 23 times [2020-10-13 23:44:30,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:30,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106718869] [2020-10-13 23:44:30,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:30,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:30,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:30,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:30,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:30,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:33,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:35,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:35,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 23:44:35,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:44:35,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:44:35,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:35,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:35,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:44:35,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:35,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 23:44:35,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:35,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:35,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:35,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:35,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:35,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:35,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:35,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:35,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:35,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:35,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:35,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:35,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:35,267 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2020-10-13 23:44:35,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106718869] [2020-10-13 23:44:35,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:35,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:44:35,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42070995] [2020-10-13 23:44:35,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:44:35,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:35,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:44:35,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:44:35,269 INFO L87 Difference]: Start difference. First operand 125 states and 156 transitions. Second operand 18 states. [2020-10-13 23:44:35,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:35,537 INFO L93 Difference]: Finished difference Result 190 states and 242 transitions. [2020-10-13 23:44:35,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:44:35,537 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 120 [2020-10-13 23:44:35,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:35,539 INFO L225 Difference]: With dead ends: 190 [2020-10-13 23:44:35,539 INFO L226 Difference]: Without dead ends: 135 [2020-10-13 23:44:35,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 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 23:44:35,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-13 23:44:35,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2020-10-13 23:44:35,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-13 23:44:35,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 164 transitions. [2020-10-13 23:44:35,546 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 164 transitions. Word has length 120 [2020-10-13 23:44:35,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:35,547 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 164 transitions. [2020-10-13 23:44:35,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:44:35,547 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 164 transitions. [2020-10-13 23:44:35,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 23:44:35,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:35,548 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:35,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:44:35,549 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:35,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:35,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1583115785, now seen corresponding path program 24 times [2020-10-13 23:44:35,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:35,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696182169] [2020-10-13 23:44:35,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:35,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:35,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:35,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:35,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:35,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:36,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:40,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:40,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 23:44:40,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:44:40,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:44:40,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:40,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:40,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:44:40,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:40,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:44:40,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:40,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:40,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:40,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:40,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:40,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:40,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:40,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:40,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:40,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:40,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:40,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:40,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2020-10-13 23:44:40,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696182169] [2020-10-13 23:44:40,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:40,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:44:40,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404741715] [2020-10-13 23:44:40,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:44:40,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:40,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:44:40,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:44:40,690 INFO L87 Difference]: Start difference. First operand 131 states and 164 transitions. Second operand 14 states. [2020-10-13 23:44:40,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:40,776 INFO L93 Difference]: Finished difference Result 238 states and 304 transitions. [2020-10-13 23:44:40,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:44:40,777 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 126 [2020-10-13 23:44:40,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:40,778 INFO L225 Difference]: With dead ends: 238 [2020-10-13 23:44:40,778 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 23:44:40,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:44:40,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 23:44:40,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-13 23:44:40,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 23:44:40,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 166 transitions. [2020-10-13 23:44:40,789 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 166 transitions. Word has length 126 [2020-10-13 23:44:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:40,789 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 166 transitions. [2020-10-13 23:44:40,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:44:40,790 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 166 transitions. [2020-10-13 23:44:40,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 23:44:40,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:40,791 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:40,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:44:40,792 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:40,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:40,792 INFO L82 PathProgramCache]: Analyzing trace with hash 632838681, now seen corresponding path program 25 times [2020-10-13 23:44:40,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:40,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143056826] [2020-10-13 23:44:40,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:40,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:40,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:40,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:41,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:41,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:42,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:43,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:43,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:45,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:45,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 23:44:45,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:44:45,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:44:45,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:45,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:45,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:44:45,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:45,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 23:44:45,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:46,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:46,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:46,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:46,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:46,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:46,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:46,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:46,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:46,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:46,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:46,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:46,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2020-10-13 23:44:46,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143056826] [2020-10-13 23:44:46,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:46,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:44:46,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592526272] [2020-10-13 23:44:46,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:44:46,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:46,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:44:46,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:44:46,030 INFO L87 Difference]: Start difference. First operand 133 states and 166 transitions. Second operand 19 states. [2020-10-13 23:44:46,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:46,270 INFO L93 Difference]: Finished difference Result 201 states and 256 transitions. [2020-10-13 23:44:46,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:44:46,273 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 128 [2020-10-13 23:44:46,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:46,275 INFO L225 Difference]: With dead ends: 201 [2020-10-13 23:44:46,275 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 23:44:46,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:44:46,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 23:44:46,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2020-10-13 23:44:46,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 23:44:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 174 transitions. [2020-10-13 23:44:46,282 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 174 transitions. Word has length 128 [2020-10-13 23:44:46,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:46,282 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 174 transitions. [2020-10-13 23:44:46,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:44:46,282 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 174 transitions. [2020-10-13 23:44:46,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-13 23:44:46,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:46,284 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:46,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:44:46,284 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:46,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:46,285 INFO L82 PathProgramCache]: Analyzing trace with hash 525331187, now seen corresponding path program 26 times [2020-10-13 23:44:46,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:46,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493336915] [2020-10-13 23:44:46,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:46,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:46,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:46,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:46,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:46,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:47,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:51,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:51,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 23:44:51,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:44:51,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:44:51,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:51,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:51,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:44:51,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:51,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 23:44:51,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:51,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:51,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:51,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:51,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:51,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:51,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:51,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:51,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:51,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:51,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:51,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:51,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2020-10-13 23:44:51,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493336915] [2020-10-13 23:44:51,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:51,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:44:51,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994600809] [2020-10-13 23:44:51,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:44:51,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:51,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:44:51,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:44:51,528 INFO L87 Difference]: Start difference. First operand 139 states and 174 transitions. Second operand 20 states. [2020-10-13 23:44:51,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:51,787 INFO L93 Difference]: Finished difference Result 210 states and 268 transitions. [2020-10-13 23:44:51,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:44:51,787 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 134 [2020-10-13 23:44:51,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:51,789 INFO L225 Difference]: With dead ends: 210 [2020-10-13 23:44:51,789 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 23:44:51,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 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 23:44:51,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 23:44:51,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2020-10-13 23:44:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 23:44:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 182 transitions. [2020-10-13 23:44:51,796 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 182 transitions. Word has length 134 [2020-10-13 23:44:51,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:51,796 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 182 transitions. [2020-10-13 23:44:51,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:44:51,797 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 182 transitions. [2020-10-13 23:44:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-13 23:44:51,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:51,798 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:51,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:44:51,798 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:51,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:51,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1695266777, now seen corresponding path program 27 times [2020-10-13 23:44:51,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:51,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905419828] [2020-10-13 23:44:51,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:51,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:51,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:51,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:52,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:52,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:52,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:56,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:56,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-13 23:44:56,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:44:56,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:44:56,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:56,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:56,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:44:56,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:44:56,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:44:56,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:44:56,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:44:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:56,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:56,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:44:56,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:44:56,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:44:56,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:44:56,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:44:56,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:44:56,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:44:56,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:44:56,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:44:56,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:44:56,960 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-10-13 23:44:56,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905419828] [2020-10-13 23:44:56,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:44:56,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:44:56,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544253085] [2020-10-13 23:44:56,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:44:56,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:44:56,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:44:56,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:44:56,963 INFO L87 Difference]: Start difference. First operand 145 states and 182 transitions. Second operand 15 states. [2020-10-13 23:44:57,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:44:57,083 INFO L93 Difference]: Finished difference Result 264 states and 338 transitions. [2020-10-13 23:44:57,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:44:57,084 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 140 [2020-10-13 23:44:57,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:44:57,085 INFO L225 Difference]: With dead ends: 264 [2020-10-13 23:44:57,085 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 23:44:57,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 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 23:44:57,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 23:44:57,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-10-13 23:44:57,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 23:44:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 184 transitions. [2020-10-13 23:44:57,092 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 184 transitions. Word has length 140 [2020-10-13 23:44:57,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:44:57,093 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 184 transitions. [2020-10-13 23:44:57,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:44:57,093 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 184 transitions. [2020-10-13 23:44:57,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 23:44:57,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:44:57,094 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:44:57,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:44:57,094 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:44:57,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:44:57,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1874420613, now seen corresponding path program 28 times [2020-10-13 23:44:57,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:44:57,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483374842] [2020-10-13 23:44:57,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:44:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:44:57,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:57,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:57,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:57,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:57,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:44:58,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:02,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:02,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 23:45:02,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:45:02,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:45:02,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:02,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:02,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:45:02,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:02,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 23:45:02,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:02,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:02,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:02,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:02,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:02,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:02,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:02,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:02,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:02,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:02,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:02,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:02,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 569 trivial. 0 not checked. [2020-10-13 23:45:02,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483374842] [2020-10-13 23:45:02,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:02,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:45:02,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216784137] [2020-10-13 23:45:02,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:45:02,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:02,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:45:02,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:45:02,366 INFO L87 Difference]: Start difference. First operand 147 states and 184 transitions. Second operand 21 states. [2020-10-13 23:45:02,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:02,668 INFO L93 Difference]: Finished difference Result 221 states and 282 transitions. [2020-10-13 23:45:02,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:45:02,669 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 142 [2020-10-13 23:45:02,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:02,670 INFO L225 Difference]: With dead ends: 221 [2020-10-13 23:45:02,671 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 23:45:02,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 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 23:45:02,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 23:45:02,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2020-10-13 23:45:02,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-13 23:45:02,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 192 transitions. [2020-10-13 23:45:02,676 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 192 transitions. Word has length 142 [2020-10-13 23:45:02,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:02,676 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 192 transitions. [2020-10-13 23:45:02,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:45:02,676 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 192 transitions. [2020-10-13 23:45:02,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-13 23:45:02,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:02,677 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:02,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:45:02,678 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:02,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:02,678 INFO L82 PathProgramCache]: Analyzing trace with hash -774004651, now seen corresponding path program 29 times [2020-10-13 23:45:02,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:02,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996960341] [2020-10-13 23:45:02,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:02,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:02,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:02,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:02,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:03,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:04,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:07,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:07,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-13 23:45:07,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:45:07,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:45:07,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:07,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:07,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:45:07,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:07,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:45:07,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:07,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:07,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:07,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:07,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:07,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:07,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:07,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:07,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:07,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:07,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:07,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:07,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:07,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1098 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2020-10-13 23:45:07,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996960341] [2020-10-13 23:45:07,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:07,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:45:07,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125527281] [2020-10-13 23:45:07,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:45:07,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:07,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:45:07,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:45:07,859 INFO L87 Difference]: Start difference. First operand 153 states and 192 transitions. Second operand 16 states. [2020-10-13 23:45:08,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:08,002 INFO L93 Difference]: Finished difference Result 278 states and 356 transitions. [2020-10-13 23:45:08,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:45:08,003 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 148 [2020-10-13 23:45:08,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:08,004 INFO L225 Difference]: With dead ends: 278 [2020-10-13 23:45:08,004 INFO L226 Difference]: Without dead ends: 156 [2020-10-13 23:45:08,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 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 23:45:08,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-13 23:45:08,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-10-13 23:45:08,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-13 23:45:08,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 194 transitions. [2020-10-13 23:45:08,011 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 194 transitions. Word has length 148 [2020-10-13 23:45:08,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:08,012 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 194 transitions. [2020-10-13 23:45:08,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:45:08,012 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 194 transitions. [2020-10-13 23:45:08,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-13 23:45:08,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:08,014 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:08,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:45:08,014 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:08,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:08,014 INFO L82 PathProgramCache]: Analyzing trace with hash -381500681, now seen corresponding path program 30 times [2020-10-13 23:45:08,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:08,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293519530] [2020-10-13 23:45:08,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:08,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:08,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:08,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:10,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:10,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:11,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:13,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:13,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-13 23:45:13,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:45:13,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:45:13,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:13,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:13,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:45:13,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:13,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-13 23:45:13,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:13,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:13,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:13,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:13,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:13,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:13,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:13,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:13,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:13,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:13,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:13,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:13,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2020-10-13 23:45:13,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293519530] [2020-10-13 23:45:13,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:13,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:45:13,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523382289] [2020-10-13 23:45:13,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:45:13,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:13,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:45:13,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:45:13,302 INFO L87 Difference]: Start difference. First operand 155 states and 194 transitions. Second operand 22 states. [2020-10-13 23:45:13,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:13,589 INFO L93 Difference]: Finished difference Result 232 states and 296 transitions. [2020-10-13 23:45:13,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:45:13,590 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 150 [2020-10-13 23:45:13,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:13,592 INFO L225 Difference]: With dead ends: 232 [2020-10-13 23:45:13,592 INFO L226 Difference]: Without dead ends: 165 [2020-10-13 23:45:13,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 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 23:45:13,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-13 23:45:13,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2020-10-13 23:45:13,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-13 23:45:13,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 202 transitions. [2020-10-13 23:45:13,600 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 202 transitions. Word has length 150 [2020-10-13 23:45:13,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:13,600 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 202 transitions. [2020-10-13 23:45:13,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:45:13,600 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 202 transitions. [2020-10-13 23:45:13,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-13 23:45:13,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:13,602 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:13,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:45:13,602 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:13,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:13,602 INFO L82 PathProgramCache]: Analyzing trace with hash -144512931, now seen corresponding path program 31 times [2020-10-13 23:45:13,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:13,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819507766] [2020-10-13 23:45:13,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:13,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:13,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:13,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:13,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:14,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:15,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:15,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:18,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:18,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-13 23:45:18,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:45:18,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:45:18,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:18,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:18,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:45:18,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:18,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 23:45:18,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:18,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:18,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:18,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:18,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:18,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:18,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:18,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:18,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:18,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:18,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:18,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:18,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1233 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 701 trivial. 0 not checked. [2020-10-13 23:45:18,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819507766] [2020-10-13 23:45:18,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:18,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:45:18,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502664267] [2020-10-13 23:45:18,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:45:18,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:18,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:45:18,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:45:18,921 INFO L87 Difference]: Start difference. First operand 161 states and 202 transitions. Second operand 23 states. [2020-10-13 23:45:19,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:19,253 INFO L93 Difference]: Finished difference Result 241 states and 308 transitions. [2020-10-13 23:45:19,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:45:19,254 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 156 [2020-10-13 23:45:19,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:19,255 INFO L225 Difference]: With dead ends: 241 [2020-10-13 23:45:19,255 INFO L226 Difference]: Without dead ends: 171 [2020-10-13 23:45:19,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 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 23:45:19,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-13 23:45:19,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2020-10-13 23:45:19,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-13 23:45:19,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 210 transitions. [2020-10-13 23:45:19,263 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 210 transitions. Word has length 156 [2020-10-13 23:45:19,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:19,264 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 210 transitions. [2020-10-13 23:45:19,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:45:19,264 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 210 transitions. [2020-10-13 23:45:19,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-13 23:45:19,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:19,265 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:19,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:45:19,266 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:19,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:19,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1543954231, now seen corresponding path program 32 times [2020-10-13 23:45:19,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:19,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635476961] [2020-10-13 23:45:19,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:19,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:19,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:19,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:19,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:19,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:20,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:22,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:24,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:24,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-13 23:45:24,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:45:24,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:45:24,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:24,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:24,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:45:24,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:24,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:45:24,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:24,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:24,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:24,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:24,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:24,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:24,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:24,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:24,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:24,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:24,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:24,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:24,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1349 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2020-10-13 23:45:24,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635476961] [2020-10-13 23:45:24,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:24,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:45:24,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642325037] [2020-10-13 23:45:24,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:45:24,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:24,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:45:24,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:45:24,454 INFO L87 Difference]: Start difference. First operand 167 states and 210 transitions. Second operand 17 states. [2020-10-13 23:45:24,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:24,598 INFO L93 Difference]: Finished difference Result 304 states and 390 transitions. [2020-10-13 23:45:24,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:45:24,599 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 162 [2020-10-13 23:45:24,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:24,600 INFO L225 Difference]: With dead ends: 304 [2020-10-13 23:45:24,600 INFO L226 Difference]: Without dead ends: 170 [2020-10-13 23:45:24,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 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 23:45:24,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-13 23:45:24,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-10-13 23:45:24,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-13 23:45:24,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 212 transitions. [2020-10-13 23:45:24,606 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 212 transitions. Word has length 162 [2020-10-13 23:45:24,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:24,607 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 212 transitions. [2020-10-13 23:45:24,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:45:24,607 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 212 transitions. [2020-10-13 23:45:24,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-13 23:45:24,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:24,608 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:24,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:45:24,609 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:24,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:24,609 INFO L82 PathProgramCache]: Analyzing trace with hash 530693721, now seen corresponding path program 33 times [2020-10-13 23:45:24,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:24,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851858708] [2020-10-13 23:45:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:24,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:24,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:24,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:25,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:25,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:26,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:27,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:29,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:29,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-13 23:45:29,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:45:29,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:45:29,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:29,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:29,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:45:29,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:29,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-13 23:45:29,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:30,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:30,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:30,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:30,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:30,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:30,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:30,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:45:30,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:30,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:30,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:30,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:45:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-10-13 23:45:30,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851858708] [2020-10-13 23:45:30,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:30,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:45:30,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713278812] [2020-10-13 23:45:30,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:45:30,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:30,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:45:30,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:45:30,084 INFO L87 Difference]: Start difference. First operand 169 states and 212 transitions. Second operand 24 states. [2020-10-13 23:45:30,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:30,541 INFO L93 Difference]: Finished difference Result 252 states and 322 transitions. [2020-10-13 23:45:30,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:45:30,542 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 164 [2020-10-13 23:45:30,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:30,544 INFO L225 Difference]: With dead ends: 252 [2020-10-13 23:45:30,544 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 23:45:30,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:45:30,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 23:45:30,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2020-10-13 23:45:30,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-13 23:45:30,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 220 transitions. [2020-10-13 23:45:30,555 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 220 transitions. Word has length 164 [2020-10-13 23:45:30,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:30,556 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 220 transitions. [2020-10-13 23:45:30,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:45:30,556 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 220 transitions. [2020-10-13 23:45:30,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-13 23:45:30,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:30,559 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:30,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:45:30,560 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:30,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:30,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1542135231, now seen corresponding path program 34 times [2020-10-13 23:45:30,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:30,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117081641] [2020-10-13 23:45:30,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:30,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:30,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:30,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:31,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:32,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:33,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:34,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:35,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:35,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:35,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-13 23:45:35,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:45:35,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:45:35,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:35,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:35,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:45:35,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:35,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:45:35,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:35,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:35,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:35,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:35,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:35,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:35,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:35,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:35,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:35,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:35,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:35,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:35,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2020-10-13 23:45:35,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117081641] [2020-10-13 23:45:35,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:35,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:45:35,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450902875] [2020-10-13 23:45:35,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:45:35,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:35,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:45:35,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:45:35,812 INFO L87 Difference]: Start difference. First operand 175 states and 220 transitions. Second operand 18 states. [2020-10-13 23:45:35,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:35,945 INFO L93 Difference]: Finished difference Result 318 states and 408 transitions. [2020-10-13 23:45:35,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:45:35,945 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 170 [2020-10-13 23:45:35,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:35,946 INFO L225 Difference]: With dead ends: 318 [2020-10-13 23:45:35,947 INFO L226 Difference]: Without dead ends: 178 [2020-10-13 23:45:35,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 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 23:45:35,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-13 23:45:35,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-10-13 23:45:35,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-13 23:45:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 222 transitions. [2020-10-13 23:45:35,959 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 222 transitions. Word has length 170 [2020-10-13 23:45:35,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:35,960 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 222 transitions. [2020-10-13 23:45:35,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:45:35,960 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 222 transitions. [2020-10-13 23:45:35,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-13 23:45:35,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:35,961 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:35,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:45:35,961 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:35,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:35,962 INFO L82 PathProgramCache]: Analyzing trace with hash 860732129, now seen corresponding path program 35 times [2020-10-13 23:45:35,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:35,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165345081] [2020-10-13 23:45:35,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:35,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:36,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:36,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:36,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:36,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:37,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:38,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:40,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:40,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-13 23:45:40,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:45:40,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:45:40,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:40,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:40,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:45:40,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:40,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 23:45:40,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:41,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:41,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:41,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:41,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:41,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:41,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:41,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:41,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:41,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:41,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:41,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:41,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1527 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-10-13 23:45:41,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165345081] [2020-10-13 23:45:41,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:41,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:45:41,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402917556] [2020-10-13 23:45:41,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:45:41,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:41,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:45:41,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:45:41,313 INFO L87 Difference]: Start difference. First operand 177 states and 222 transitions. Second operand 25 states. [2020-10-13 23:45:41,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:41,689 INFO L93 Difference]: Finished difference Result 263 states and 336 transitions. [2020-10-13 23:45:41,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:45:41,689 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 172 [2020-10-13 23:45:41,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:41,691 INFO L225 Difference]: With dead ends: 263 [2020-10-13 23:45:41,691 INFO L226 Difference]: Without dead ends: 187 [2020-10-13 23:45:41,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 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 23:45:41,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-13 23:45:41,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2020-10-13 23:45:41,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-13 23:45:41,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 230 transitions. [2020-10-13 23:45:41,702 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 230 transitions. Word has length 172 [2020-10-13 23:45:41,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:41,704 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 230 transitions. [2020-10-13 23:45:41,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:45:41,704 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 230 transitions. [2020-10-13 23:45:41,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-13 23:45:41,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:41,705 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:41,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:45:41,706 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:41,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:41,706 INFO L82 PathProgramCache]: Analyzing trace with hash 286671675, now seen corresponding path program 36 times [2020-10-13 23:45:41,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:41,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005697836] [2020-10-13 23:45:41,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:41,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:41,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:41,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:42,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:42,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:46,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:46,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-13 23:45:46,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:45:46,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 23:45:46,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:46,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:46,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:45:46,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:46,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:45:46,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:46,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:46,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:46,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:46,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:46,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:46,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:46,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:46,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:46,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:46,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:46,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:46,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2020-10-13 23:45:46,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005697836] [2020-10-13 23:45:46,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:46,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:45:46,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428734877] [2020-10-13 23:45:46,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:45:46,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:46,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:45:46,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:45:46,968 INFO L87 Difference]: Start difference. First operand 183 states and 230 transitions. Second operand 19 states. [2020-10-13 23:45:47,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:47,091 INFO L93 Difference]: Finished difference Result 332 states and 426 transitions. [2020-10-13 23:45:47,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:45:47,092 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 178 [2020-10-13 23:45:47,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:47,093 INFO L225 Difference]: With dead ends: 332 [2020-10-13 23:45:47,093 INFO L226 Difference]: Without dead ends: 186 [2020-10-13 23:45:47,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:45:47,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-13 23:45:47,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2020-10-13 23:45:47,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-13 23:45:47,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 232 transitions. [2020-10-13 23:45:47,102 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 232 transitions. Word has length 178 [2020-10-13 23:45:47,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:47,102 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 232 transitions. [2020-10-13 23:45:47,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:45:47,102 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 232 transitions. [2020-10-13 23:45:47,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-13 23:45:47,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:47,104 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:47,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:45:47,104 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:47,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:47,104 INFO L82 PathProgramCache]: Analyzing trace with hash 262315613, now seen corresponding path program 37 times [2020-10-13 23:45:47,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:47,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685475189] [2020-10-13 23:45:47,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:47,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:47,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:47,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:52,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:52,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-13 23:45:52,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:45:52,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 23:45:52,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:52,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:52,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:45:52,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:52,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-13 23:45:52,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:52,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:52,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:52,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:52,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:52,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:52,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:52,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:52,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:52,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:52,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:52,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:52,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1686 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 971 trivial. 0 not checked. [2020-10-13 23:45:52,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685475189] [2020-10-13 23:45:52,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:52,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:45:52,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352235129] [2020-10-13 23:45:52,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:45:52,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:52,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:45:52,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:45:52,516 INFO L87 Difference]: Start difference. First operand 185 states and 232 transitions. Second operand 26 states. [2020-10-13 23:45:52,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:52,805 INFO L93 Difference]: Finished difference Result 274 states and 350 transitions. [2020-10-13 23:45:52,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:45:52,806 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 180 [2020-10-13 23:45:52,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:52,808 INFO L225 Difference]: With dead ends: 274 [2020-10-13 23:45:52,808 INFO L226 Difference]: Without dead ends: 195 [2020-10-13 23:45:52,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 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 23:45:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-13 23:45:52,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2020-10-13 23:45:52,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-13 23:45:52,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 240 transitions. [2020-10-13 23:45:52,815 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 240 transitions. Word has length 180 [2020-10-13 23:45:52,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:52,816 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 240 transitions. [2020-10-13 23:45:52,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:45:52,816 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 240 transitions. [2020-10-13 23:45:52,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-13 23:45:52,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:52,817 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:52,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:45:52,817 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:52,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:52,818 INFO L82 PathProgramCache]: Analyzing trace with hash -43706813, now seen corresponding path program 38 times [2020-10-13 23:45:52,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:52,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447979486] [2020-10-13 23:45:52,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:52,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:52,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:52,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:53,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:53,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:55,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:57,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:57,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-13 23:45:57,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:45:57,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-13 23:45:57,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:57,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:57,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:45:57,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:45:57,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-13 23:45:57,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:45:58,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:45:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:58,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:58,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:45:58,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:45:58,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:45:58,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:45:58,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:45:58,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:45:58,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:45:58,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:45:58,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:45:58,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:45:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 1038 trivial. 0 not checked. [2020-10-13 23:45:58,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447979486] [2020-10-13 23:45:58,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:45:58,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:45:58,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344000062] [2020-10-13 23:45:58,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:45:58,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:45:58,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:45:58,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:45:58,346 INFO L87 Difference]: Start difference. First operand 191 states and 240 transitions. Second operand 27 states. [2020-10-13 23:45:58,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:45:58,705 INFO L93 Difference]: Finished difference Result 283 states and 362 transitions. [2020-10-13 23:45:58,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:45:58,705 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 186 [2020-10-13 23:45:58,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:45:58,708 INFO L225 Difference]: With dead ends: 283 [2020-10-13 23:45:58,708 INFO L226 Difference]: Without dead ends: 201 [2020-10-13 23:45:58,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 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 23:45:58,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-13 23:45:58,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2020-10-13 23:45:58,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-13 23:45:58,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 248 transitions. [2020-10-13 23:45:58,715 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 248 transitions. Word has length 186 [2020-10-13 23:45:58,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:45:58,715 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 248 transitions. [2020-10-13 23:45:58,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:45:58,716 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 248 transitions. [2020-10-13 23:45:58,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-13 23:45:58,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:45:58,717 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:45:58,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 23:45:58,717 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:45:58,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:45:58,718 INFO L82 PathProgramCache]: Analyzing trace with hash -773967459, now seen corresponding path program 39 times [2020-10-13 23:45:58,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:45:58,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087136220] [2020-10-13 23:45:58,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:45:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:45:58,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:58,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:58,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:59,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:45:59,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:01,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:03,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:03,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:03,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-13 23:46:03,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:46:03,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-13 23:46:03,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:03,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:03,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:46:03,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:03,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:46:03,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:03,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:03,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:03,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:03,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:03,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:03,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:03,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:03,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:03,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:03,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:03,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:03,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1960 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1704 trivial. 0 not checked. [2020-10-13 23:46:03,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087136220] [2020-10-13 23:46:03,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:03,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:46:03,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003645165] [2020-10-13 23:46:03,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:46:03,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:03,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:46:03,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:46:03,987 INFO L87 Difference]: Start difference. First operand 197 states and 248 transitions. Second operand 20 states. [2020-10-13 23:46:04,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:04,146 INFO L93 Difference]: Finished difference Result 358 states and 460 transitions. [2020-10-13 23:46:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:46:04,146 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 192 [2020-10-13 23:46:04,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:04,148 INFO L225 Difference]: With dead ends: 358 [2020-10-13 23:46:04,148 INFO L226 Difference]: Without dead ends: 200 [2020-10-13 23:46:04,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 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 23:46:04,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-13 23:46:04,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2020-10-13 23:46:04,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-13 23:46:04,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 250 transitions. [2020-10-13 23:46:04,155 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 250 transitions. Word has length 192 [2020-10-13 23:46:04,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:04,155 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 250 transitions. [2020-10-13 23:46:04,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:46:04,155 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 250 transitions. [2020-10-13 23:46:04,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-13 23:46:04,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:04,157 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:04,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 23:46:04,157 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:04,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:04,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1498638655, now seen corresponding path program 40 times [2020-10-13 23:46:04,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:04,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072941401] [2020-10-13 23:46:04,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:04,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:04,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:04,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:09,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:09,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-10-13 23:46:09,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:46:09,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 23:46:09,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:09,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:09,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:46:09,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:09,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-13 23:46:09,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:09,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:09,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:09,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:09,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:09,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:09,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:09,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:09,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:09,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:09,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:09,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:09,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1993 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 1141 trivial. 0 not checked. [2020-10-13 23:46:09,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072941401] [2020-10-13 23:46:09,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:09,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:46:09,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169637685] [2020-10-13 23:46:09,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:46:09,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:09,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:46:09,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:46:09,617 INFO L87 Difference]: Start difference. First operand 199 states and 250 transitions. Second operand 28 states. [2020-10-13 23:46:10,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:10,102 INFO L93 Difference]: Finished difference Result 294 states and 376 transitions. [2020-10-13 23:46:10,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:46:10,103 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 194 [2020-10-13 23:46:10,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:10,105 INFO L225 Difference]: With dead ends: 294 [2020-10-13 23:46:10,105 INFO L226 Difference]: Without dead ends: 209 [2020-10-13 23:46:10,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 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 23:46:10,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-13 23:46:10,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2020-10-13 23:46:10,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-13 23:46:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 258 transitions. [2020-10-13 23:46:10,119 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 258 transitions. Word has length 194 [2020-10-13 23:46:10,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:10,121 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 258 transitions. [2020-10-13 23:46:10,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:46:10,122 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 258 transitions. [2020-10-13 23:46:10,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-13 23:46:10,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:10,124 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:10,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 23:46:10,126 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:10,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:10,126 INFO L82 PathProgramCache]: Analyzing trace with hash -2077213915, now seen corresponding path program 41 times [2020-10-13 23:46:10,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:10,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211233971] [2020-10-13 23:46:10,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:10,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:10,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:10,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:11,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:11,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:14,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:15,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:15,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-13 23:46:15,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:46:15,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 23:46:15,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:15,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:15,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:46:15,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:15,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:46:15,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:15,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:15,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:15,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:15,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:15,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:15,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:15,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:15,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:15,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:15,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:15,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:15,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1850 trivial. 0 not checked. [2020-10-13 23:46:15,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211233971] [2020-10-13 23:46:15,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:15,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:46:15,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348400567] [2020-10-13 23:46:15,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:46:15,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:15,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:46:15,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:46:15,452 INFO L87 Difference]: Start difference. First operand 205 states and 258 transitions. Second operand 21 states. [2020-10-13 23:46:15,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:15,609 INFO L93 Difference]: Finished difference Result 372 states and 478 transitions. [2020-10-13 23:46:15,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:46:15,610 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 200 [2020-10-13 23:46:15,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:15,611 INFO L225 Difference]: With dead ends: 372 [2020-10-13 23:46:15,611 INFO L226 Difference]: Without dead ends: 208 [2020-10-13 23:46:15,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 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 23:46:15,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-13 23:46:15,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2020-10-13 23:46:15,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-13 23:46:15,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 260 transitions. [2020-10-13 23:46:15,618 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 260 transitions. Word has length 200 [2020-10-13 23:46:15,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:15,619 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 260 transitions. [2020-10-13 23:46:15,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:46:15,619 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 260 transitions. [2020-10-13 23:46:15,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-13 23:46:15,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:15,620 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:15,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 23:46:15,621 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:15,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:15,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1305260231, now seen corresponding path program 42 times [2020-10-13 23:46:15,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:15,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934291175] [2020-10-13 23:46:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:15,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:15,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:15,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:16,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:16,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:18,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:20,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:20,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:20,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-13 23:46:20,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:46:20,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-13 23:46:20,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:20,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:20,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 23:46:20,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:20,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-13 23:46:20,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:21,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:21,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:21,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:21,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:21,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:21,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:21,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:21,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:21,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:21,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:21,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:21,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2174 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 1249 trivial. 0 not checked. [2020-10-13 23:46:21,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934291175] [2020-10-13 23:46:21,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:21,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 23:46:21,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504225788] [2020-10-13 23:46:21,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 23:46:21,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:21,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 23:46:21,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:46:21,119 INFO L87 Difference]: Start difference. First operand 207 states and 260 transitions. Second operand 29 states. [2020-10-13 23:46:21,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:21,577 INFO L93 Difference]: Finished difference Result 305 states and 390 transitions. [2020-10-13 23:46:21,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:46:21,578 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 202 [2020-10-13 23:46:21,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:21,580 INFO L225 Difference]: With dead ends: 305 [2020-10-13 23:46:21,580 INFO L226 Difference]: Without dead ends: 217 [2020-10-13 23:46:21,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 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 23:46:21,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-13 23:46:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 213. [2020-10-13 23:46:21,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-13 23:46:21,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 268 transitions. [2020-10-13 23:46:21,588 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 268 transitions. Word has length 202 [2020-10-13 23:46:21,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:21,588 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 268 transitions. [2020-10-13 23:46:21,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 23:46:21,589 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 268 transitions. [2020-10-13 23:46:21,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-13 23:46:21,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:21,590 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:21,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 23:46:21,591 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:21,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:21,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1726898783, now seen corresponding path program 43 times [2020-10-13 23:46:21,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:21,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568857538] [2020-10-13 23:46:21,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:21,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:21,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:21,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:22,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:22,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:24,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:26,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:26,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-13 23:46:26,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:46:26,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 23:46:26,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:26,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:26,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:46:26,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:46:26,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-13 23:46:26,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:46:27,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:46:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:27,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:27,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:46:27,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:46:27,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:46:27,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:46:27,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:46:27,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:46:27,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:46:27,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:46:27,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:46:27,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:46:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2326 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 1325 trivial. 0 not checked. [2020-10-13 23:46:27,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568857538] [2020-10-13 23:46:27,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:46:27,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:46:27,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197767035] [2020-10-13 23:46:27,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:46:27,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:46:27,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:46:27,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:46:27,118 INFO L87 Difference]: Start difference. First operand 213 states and 268 transitions. Second operand 30 states. [2020-10-13 23:46:27,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:46:27,500 INFO L93 Difference]: Finished difference Result 314 states and 402 transitions. [2020-10-13 23:46:27,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 23:46:27,501 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 208 [2020-10-13 23:46:27,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:46:27,503 INFO L225 Difference]: With dead ends: 314 [2020-10-13 23:46:27,503 INFO L226 Difference]: Without dead ends: 223 [2020-10-13 23:46:27,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 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 23:46:27,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-13 23:46:27,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2020-10-13 23:46:27,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-13 23:46:27,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 276 transitions. [2020-10-13 23:46:27,510 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 276 transitions. Word has length 208 [2020-10-13 23:46:27,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:46:27,511 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 276 transitions. [2020-10-13 23:46:27,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:46:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 276 transitions. [2020-10-13 23:46:27,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-13 23:46:27,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:46:27,512 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:46:27,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 23:46:27,513 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:46:27,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:46:27,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1664944519, now seen corresponding path program 44 times [2020-10-13 23:46:27,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:46:27,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772837265] [2020-10-13 23:46:27,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:46:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:46:27,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:27,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:27,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:28,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:46:28,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking...