/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 SingleStatement --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=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 08:56:31,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 08:56:31,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 08:56:31,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 08:56:31,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 08:56:31,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 08:56:31,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 08:56:31,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 08:56:31,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 08:56:31,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 08:56:31,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 08:56:31,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 08:56:31,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 08:56:31,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 08:56:31,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 08:56:31,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 08:56:31,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 08:56:31,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 08:56:31,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 08:56:31,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 08:56:31,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 08:56:31,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 08:56:31,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 08:56:31,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 08:56:31,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 08:56:31,431 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 08:56:31,431 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 08:56:31,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 08:56:31,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 08:56:31,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 08:56:31,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 08:56:31,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 08:56:31,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 08:56:31,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 08:56:31,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 08:56:31,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 08:56:31,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 08:56:31,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 08:56:31,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 08:56:31,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 08:56:31,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 08:56:31,443 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 [2020-09-25 08:56:31,471 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 08:56:31,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 08:56:31,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 08:56:31,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 08:56:31,476 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 08:56:31,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 08:56:31,477 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 08:56:31,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 08:56:31,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 08:56:31,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 08:56:31,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 08:56:31,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 08:56:31,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 08:56:31,478 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 08:56:31,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 08:56:31,478 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 08:56:31,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 08:56:31,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 08:56:31,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 08:56:31,479 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 08:56:31,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 08:56:31,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 08:56:31,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 08:56:31,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 08:56:31,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 08:56:31,483 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 08:56:31,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 08:56:31,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 08:56:31,484 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 08:56:31,484 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 -> SingleStatement 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=1.0;log-additional-information=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=1.0;log-additional-information=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=1.0;log-additional-information=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=1.0;log-additional-information=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=1.0;log-additional-information=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=1.0;log-additional-information=true; [2020-09-25 08:56:31,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 08:56:31,967 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 08:56:31,971 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 08:56:31,973 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 08:56:31,973 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 08:56:31,975 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c [2020-09-25 08:56:32,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c1b8249e/611889b0e110457b880db34a40089f97/FLAG62fde52be [2020-09-25 08:56:32,606 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 08:56:32,609 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c [2020-09-25 08:56:32,618 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c1b8249e/611889b0e110457b880db34a40089f97/FLAG62fde52be [2020-09-25 08:56:32,938 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c1b8249e/611889b0e110457b880db34a40089f97 [2020-09-25 08:56:32,954 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 08:56:32,961 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 08:56:32,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 08:56:32,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 08:56:32,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 08:56:32,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:56:32" (1/1) ... [2020-09-25 08:56:32,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@248aaf70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:56:32, skipping insertion in model container [2020-09-25 08:56:32,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:56:32" (1/1) ... [2020-09-25 08:56:32,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 08:56:33,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 08:56:33,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:56:33,327 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 08:56:33,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 08:56:33,400 INFO L208 MainTranslator]: Completed translation [2020-09-25 08:56:33,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:56:33 WrapperNode [2020-09-25 08:56:33,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 08:56:33,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 08:56:33,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 08:56:33,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 08:56:33,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:56:33" (1/1) ... [2020-09-25 08:56:33,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:56:33" (1/1) ... [2020-09-25 08:56:33,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:56:33" (1/1) ... [2020-09-25 08:56:33,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:56:33" (1/1) ... [2020-09-25 08:56:33,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:56:33" (1/1) ... [2020-09-25 08:56:33,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:56:33" (1/1) ... [2020-09-25 08:56:33,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:56:33" (1/1) ... [2020-09-25 08:56:33,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 08:56:33,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 08:56:33,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 08:56:33,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 08:56:33,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:56:33" (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 [2020-09-25 08:56:33,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 08:56:33,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 08:56:33,678 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 08:56:33,678 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 08:56:33,678 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-25 08:56:33,678 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 08:56:33,678 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-09-25 08:56:33,679 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-25 08:56:33,679 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 08:56:33,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 08:56:33,679 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 08:56:33,679 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 08:56:33,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 08:56:33,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 08:56:33,680 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 08:56:33,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 08:56:33,680 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 08:56:33,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 08:56:33,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-09-25 08:56:33,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 08:56:33,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 08:56:33,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 08:56:33,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 08:56:34,084 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 08:56:34,084 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 08:56:34,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:56:34 BoogieIcfgContainer [2020-09-25 08:56:34,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 08:56:34,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 08:56:34,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 08:56:34,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 08:56:34,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 08:56:32" (1/3) ... [2020-09-25 08:56:34,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148a00ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:56:34, skipping insertion in model container [2020-09-25 08:56:34,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:56:33" (2/3) ... [2020-09-25 08:56:34,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148a00ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:56:34, skipping insertion in model container [2020-09-25 08:56:34,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:56:34" (3/3) ... [2020-09-25 08:56:34,102 INFO L109 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2020-09-25 08:56:34,115 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 08:56:34,126 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 08:56:34,150 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 08:56:34,183 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 08:56:34,183 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 08:56:34,183 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 08:56:34,183 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 08:56:34,184 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 08:56:34,184 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 08:56:34,184 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 08:56:34,184 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 08:56:34,212 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2020-09-25 08:56:34,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-25 08:56:34,221 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:56:34,223 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:56:34,223 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:56:34,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:56:34,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1228919024, now seen corresponding path program 1 times [2020-09-25 08:56:34,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:56:34,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302526641] [2020-09-25 08:56:34,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:56:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:34,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:35,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:35,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 08:56:35,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:35,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 710 [2020-09-25 08:56:35,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:35,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:35,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 08:56:35,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 08:56:35,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 08:56:35,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 08:56:35,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:56:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:35,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:35,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:35,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:56:35,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:35,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 08:56:35,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:35,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:35,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:56:35,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:35,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:56:35,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:35,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 08:56:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:35,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:35,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:35,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:56:35,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:35,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 08:56:35,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:35,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:35,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:56:35,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:35,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:56:35,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:35,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 08:56:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:35,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:35,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:35,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:56:35,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:35,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 08:56:35,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:35,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:35,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:56:35,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:35,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:56:35,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:35,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 08:56:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:35,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:35,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:35,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 08:56:35,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:35,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 08:56:35,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:35,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:35,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:56:35,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:35,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:56:35,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:35,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-25 08:56:35,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302526641] [2020-09-25 08:56:35,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:56:35,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-25 08:56:35,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821581421] [2020-09-25 08:56:35,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 08:56:35,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:56:35,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 08:56:35,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-25 08:56:35,471 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 10 states. [2020-09-25 08:56:36,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:56:36,444 INFO L93 Difference]: Finished difference Result 221 states and 257 transitions. [2020-09-25 08:56:36,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 08:56:36,446 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-09-25 08:56:36,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:56:36,463 INFO L225 Difference]: With dead ends: 221 [2020-09-25 08:56:36,464 INFO L226 Difference]: Without dead ends: 138 [2020-09-25 08:56:36,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-25 08:56:36,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-25 08:56:36,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 122. [2020-09-25 08:56:36,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-25 08:56:36,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2020-09-25 08:56:36,549 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 40 [2020-09-25 08:56:36,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:56:36,550 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2020-09-25 08:56:36,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 08:56:36,550 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2020-09-25 08:56:36,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-25 08:56:36,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:56:36,554 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:56:36,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 08:56:36,555 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:56:36,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:56:36,559 INFO L82 PathProgramCache]: Analyzing trace with hash -2013393660, now seen corresponding path program 1 times [2020-09-25 08:56:36,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:56:36,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464133101] [2020-09-25 08:56:36,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:56:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:36,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:36,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:39,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:39,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 08:56:39,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:56:39,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2623 [2020-09-25 08:56:39,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:39,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:39,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-25 08:56:39,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 08:56:39,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 08:56:39,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 08:56:39,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:56:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:39,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:39,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:39,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:56:39,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:39,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 08:56:39,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:39,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:39,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:56:39,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:39,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:56:39,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:39,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 08:56:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:39,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:39,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:39,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:56:39,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:39,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 08:56:39,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:39,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:39,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:56:39,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:39,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:56:39,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:39,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 08:56:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:39,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:39,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:39,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:56:39,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:39,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 08:56:39,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:39,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:39,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 08:56:39,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:39,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 08:56:39,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:39,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 08:56:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:39,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:39,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:39,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 08:56:39,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:39,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 08:56:39,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:39,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:39,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:56:39,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:39,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 08:56:39,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:39,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-25 08:56:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:39,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:39,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:39,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 08:56:39,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:39,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-25 08:56:39,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:39,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:39,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 08:56:39,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:39,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 08:56:39,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 08:56:39,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464133101] [2020-09-25 08:56:39,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 08:56:39,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-09-25 08:56:39,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376481710] [2020-09-25 08:56:39,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 08:56:39,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:56:39,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 08:56:39,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-09-25 08:56:39,894 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand 19 states. [2020-09-25 08:56:41,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:56:41,773 INFO L93 Difference]: Finished difference Result 170 states and 189 transitions. [2020-09-25 08:56:41,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-25 08:56:41,774 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-09-25 08:56:41,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:56:41,777 INFO L225 Difference]: With dead ends: 170 [2020-09-25 08:56:41,777 INFO L226 Difference]: Without dead ends: 151 [2020-09-25 08:56:41,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2020-09-25 08:56:41,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-25 08:56:41,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 121. [2020-09-25 08:56:41,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-25 08:56:41,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2020-09-25 08:56:41,799 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 52 [2020-09-25 08:56:41,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:56:41,800 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2020-09-25 08:56:41,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 08:56:41,800 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2020-09-25 08:56:41,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-25 08:56:41,803 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:56:41,803 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:56:41,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 08:56:41,803 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:56:41,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:56:41,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1709597342, now seen corresponding path program 1 times [2020-09-25 08:56:41,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:56:41,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034846656] [2020-09-25 08:56:41,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:56:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:41,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:41,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:44,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:44,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-25 08:56:44,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 08:56:44,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3004 [2020-09-25 08:56:44,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:44,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:44,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 08:56:44,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 08:56:44,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 08:56:44,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:45,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:56:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:45,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:45,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:45,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:56:45,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:45,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 08:56:45,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:45,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:45,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:56:45,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:45,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:56:45,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:45,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 08:56:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:45,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:45,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:45,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:56:45,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:45,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 08:56:45,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:45,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:45,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:56:45,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:45,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:56:45,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:45,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 08:56:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:45,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:45,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:45,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:56:45,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:45,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 08:56:45,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:45,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:45,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:56:45,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:45,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:56:45,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:45,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 08:56:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:45,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:45,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:45,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 08:56:45,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:45,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 08:56:45,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:45,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:45,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:56:45,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:45,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:56:45,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:45,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-25 08:56:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:45,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:45,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:45,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:56:45,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:45,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 08:56:45,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:45,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:45,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:56:45,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:45,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 08:56:45,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:45,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-25 08:56:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:45,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:45,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:45,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:56:45,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:45,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 08:56:45,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:45,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:45,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:56:45,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:45,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 08:56:45,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 08:56:45,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034846656] [2020-09-25 08:56:45,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:56:45,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 08:56:45,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000297130] [2020-09-25 08:56:45,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 08:56:45,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:56:45,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 08:56:45,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-25 08:56:45,155 INFO L87 Difference]: Start difference. First operand 121 states and 130 transitions. Second operand 15 states. [2020-09-25 08:56:46,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:56:46,974 INFO L93 Difference]: Finished difference Result 195 states and 212 transitions. [2020-09-25 08:56:46,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 08:56:46,974 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-09-25 08:56:46,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:56:46,977 INFO L225 Difference]: With dead ends: 195 [2020-09-25 08:56:46,978 INFO L226 Difference]: Without dead ends: 193 [2020-09-25 08:56:46,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2020-09-25 08:56:46,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-25 08:56:46,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 164. [2020-09-25 08:56:46,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-25 08:56:46,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 178 transitions. [2020-09-25 08:56:46,999 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 178 transitions. Word has length 67 [2020-09-25 08:56:47,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:56:47,000 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 178 transitions. [2020-09-25 08:56:47,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 08:56:47,000 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 178 transitions. [2020-09-25 08:56:47,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-25 08:56:47,002 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:56:47,003 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:56:47,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 08:56:47,003 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:56:47,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:56:47,004 INFO L82 PathProgramCache]: Analyzing trace with hash 587834366, now seen corresponding path program 1 times [2020-09-25 08:56:47,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:56:47,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32360483] [2020-09-25 08:56:47,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:56:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:47,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:47,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:47,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:52,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:52,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-25 08:56:52,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 08:56:52,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 08:56:52,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:52,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:52,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 08:56:52,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 08:56:52,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 08:56:52,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:52,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:56:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:52,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:52,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:52,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:56:52,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:52,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 08:56:52,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:52,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:52,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:56:52,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:52,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:56:52,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:52,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 08:56:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:52,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:52,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:52,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:56:52,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:52,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 08:56:52,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:52,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:52,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:56:52,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:52,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:56:52,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:52,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 08:56:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:52,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:52,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:52,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:56:52,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:52,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 08:56:52,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:52,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:52,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:56:52,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:52,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:56:52,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:52,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 08:56:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:52,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:52,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:52,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 08:56:52,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:52,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 08:56:52,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:52,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:52,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:56:52,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:52,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:56:52,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 08:56:52,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-25 08:56:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:52,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:52,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:52,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:56:52,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:52,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 08:56:52,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:52,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:52,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:56:52,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:52,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 08:56:52,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:52,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-25 08:56:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:52,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:52,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:52,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:56:52,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:52,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 08:56:52,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:52,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:52,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:56:52,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:52,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 08:56:52,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 08:56:52,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32360483] [2020-09-25 08:56:52,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:56:52,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 08:56:52,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964616324] [2020-09-25 08:56:52,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 08:56:52,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:56:52,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 08:56:52,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-09-25 08:56:52,409 INFO L87 Difference]: Start difference. First operand 164 states and 178 transitions. Second operand 16 states. [2020-09-25 08:56:54,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:56:54,365 INFO L93 Difference]: Finished difference Result 237 states and 260 transitions. [2020-09-25 08:56:54,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 08:56:54,365 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-09-25 08:56:54,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:56:54,368 INFO L225 Difference]: With dead ends: 237 [2020-09-25 08:56:54,368 INFO L226 Difference]: Without dead ends: 235 [2020-09-25 08:56:54,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=257, Invalid=865, Unknown=0, NotChecked=0, Total=1122 [2020-09-25 08:56:54,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-09-25 08:56:54,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 207. [2020-09-25 08:56:54,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-09-25 08:56:54,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 226 transitions. [2020-09-25 08:56:54,395 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 226 transitions. Word has length 67 [2020-09-25 08:56:54,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:56:54,396 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 226 transitions. [2020-09-25 08:56:54,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 08:56:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 226 transitions. [2020-09-25 08:56:54,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-25 08:56:54,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:56:54,399 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:56:54,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 08:56:54,400 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:56:54,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:56:54,400 INFO L82 PathProgramCache]: Analyzing trace with hash 687369648, now seen corresponding path program 1 times [2020-09-25 08:56:54,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:56:54,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372904320] [2020-09-25 08:56:54,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:56:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:54,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:54,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:55,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:59,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:59,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 08:56:59,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 08:56:59,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 08:56:59,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:59,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 08:56:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-09-25 08:56:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-09-25 08:56:59,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:59,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:56:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:59,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:59,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:59,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:56:59,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:59,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 08:56:59,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:59,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:59,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:56:59,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:59,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:56:59,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:59,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 08:56:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:59,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:59,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:59,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:56:59,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:59,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 08:56:59,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:59,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:59,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:56:59,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:59,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:56:59,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:59,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 08:56:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:59,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:59,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:59,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:56:59,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:59,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 08:56:59,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:59,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:59,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:56:59,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:59,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:56:59,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:56:59,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 08:56:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:59,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:59,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:59,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 08:56:59,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:59,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 08:56:59,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:59,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:59,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 08:56:59,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:59,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 08:56:59,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:59,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-25 08:56:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:59,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:59,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:59,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:56:59,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:59,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 08:56:59,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:59,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:59,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:56:59,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:59,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 08:56:59,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:59,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-25 08:56:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:59,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:59,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:59,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:56:59,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:59,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 08:56:59,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:59,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:59,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:56:59,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:59,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 08:56:59,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:59,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-25 08:56:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:56:59,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:56:59,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:56:59,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-25 08:56:59,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:56:59,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 08:56:59,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:56:59,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:56:59,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:56:59,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:56:59,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 08:56:59,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:56:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-25 08:56:59,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372904320] [2020-09-25 08:56:59,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:56:59,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 08:56:59,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127234759] [2020-09-25 08:56:59,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 08:56:59,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:56:59,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 08:56:59,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-09-25 08:56:59,829 INFO L87 Difference]: Start difference. First operand 207 states and 226 transitions. Second operand 15 states. [2020-09-25 08:57:00,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:57:00,991 INFO L93 Difference]: Finished difference Result 219 states and 240 transitions. [2020-09-25 08:57:00,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 08:57:00,992 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 79 [2020-09-25 08:57:00,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:57:00,996 INFO L225 Difference]: With dead ends: 219 [2020-09-25 08:57:00,997 INFO L226 Difference]: Without dead ends: 217 [2020-09-25 08:57:00,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2020-09-25 08:57:00,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-25 08:57:01,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 211. [2020-09-25 08:57:01,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-09-25 08:57:01,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 229 transitions. [2020-09-25 08:57:01,040 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 229 transitions. Word has length 79 [2020-09-25 08:57:01,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:57:01,043 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 229 transitions. [2020-09-25 08:57:01,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 08:57:01,043 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 229 transitions. [2020-09-25 08:57:01,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-09-25 08:57:01,049 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:57:01,049 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:57:01,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 08:57:01,049 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:57:01,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:57:01,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1486199216, now seen corresponding path program 2 times [2020-09-25 08:57:01,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:57:01,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900189604] [2020-09-25 08:57:01,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:57:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:57:01,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:01,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:01,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:06,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:57:06,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-09-25 08:57:06,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 08:57:06,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 08:57:06,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:57:06,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:57:06,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-25 08:57:06,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 08:57:06,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-25 08:57:06,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:57:06,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:57:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:57:06,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:06,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:57:06,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:57:06,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:57:06,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 08:57:06,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:57:06,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:57:06,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:57:06,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:57:06,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:57:06,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:57:06,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 08:57:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:57:06,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:06,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:57:06,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:57:06,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:57:06,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 08:57:06,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:57:06,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:57:06,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:57:06,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:57:06,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:57:06,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:57:06,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 08:57:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:57:06,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:06,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:57:06,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:57:06,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:57:06,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 08:57:06,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:57:06,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:57:06,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:57:06,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:57:06,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:57:06,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:57:06,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 08:57:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:57:06,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:06,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:57:06,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 08:57:06,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:57:06,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 08:57:06,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:57:06,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:57:06,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:57:06,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:57:06,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:57:06,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:57:06,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-25 08:57:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:57:06,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:06,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:57:06,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:57:06,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:57:06,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 08:57:06,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:57:06,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:57:06,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:57:06,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:57:06,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 08:57:06,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:57:06,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-25 08:57:06,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:57:06,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:06,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:57:06,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:57:06,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:57:06,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 08:57:06,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:57:06,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:57:06,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:57:06,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:57:06,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 08:57:06,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:57:06,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-25 08:57:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:57:06,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:06,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:57:06,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:57:06,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:57:06,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 08:57:06,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:57:06,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:57:06,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:57:06,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:57:06,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 08:57:06,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:57:06,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-25 08:57:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:57:06,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:06,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:57:06,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:57:06,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:57:06,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 08:57:06,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:57:06,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:57:06,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:57:06,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:57:06,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 08:57:06,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:57:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-25 08:57:06,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900189604] [2020-09-25 08:57:06,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:57:06,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 08:57:06,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830328104] [2020-09-25 08:57:06,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 08:57:06,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:57:06,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 08:57:06,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-09-25 08:57:06,645 INFO L87 Difference]: Start difference. First operand 211 states and 229 transitions. Second operand 20 states. [2020-09-25 08:57:09,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:57:09,090 INFO L93 Difference]: Finished difference Result 298 states and 326 transitions. [2020-09-25 08:57:09,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-25 08:57:09,091 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-09-25 08:57:09,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:57:09,096 INFO L225 Difference]: With dead ends: 298 [2020-09-25 08:57:09,096 INFO L226 Difference]: Without dead ends: 296 [2020-09-25 08:57:09,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=298, Invalid=1424, Unknown=0, NotChecked=0, Total=1722 [2020-09-25 08:57:09,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-09-25 08:57:09,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 255. [2020-09-25 08:57:09,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-09-25 08:57:09,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 279 transitions. [2020-09-25 08:57:09,116 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 279 transitions. Word has length 94 [2020-09-25 08:57:09,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:57:09,117 INFO L479 AbstractCegarLoop]: Abstraction has 255 states and 279 transitions. [2020-09-25 08:57:09,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 08:57:09,117 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 279 transitions. [2020-09-25 08:57:09,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-09-25 08:57:09,119 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:57:09,120 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:57:09,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 08:57:09,120 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:57:09,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:57:09,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1687005104, now seen corresponding path program 1 times [2020-09-25 08:57:09,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:57:09,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969038205] [2020-09-25 08:57:09,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:57:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:57:09,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:09,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:09,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:14,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:57:14,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-09-25 08:57:14,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 08:57:14,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-25 08:57:14,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:57:14,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:57:14,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-25 08:57:14,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-09-25 08:57:14,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-25 08:57:14,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:57:14,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 08:57:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:57:14,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:14,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:57:14,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 08:57:14,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:57:14,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 08:57:14,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:57:14,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:57:14,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:57:14,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:57:14,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:57:14,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 08:57:14,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 08:57:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:57:14,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:14,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:57:14,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:57:14,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:57:14,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 08:57:14,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:57:14,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:57:14,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:57:14,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:57:14,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:57:14,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:57:14,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-09-25 08:57:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:57:14,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:14,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:57:14,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:57:14,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:57:14,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 08:57:14,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:57:14,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:57:14,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:57:14,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:57:14,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:57:14,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:57:14,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-25 08:57:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:57:14,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:14,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:57:14,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 08:57:14,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:57:14,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 08:57:14,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:57:14,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:57:14,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 08:57:14,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:57:14,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 08:57:14,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:57:14,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-25 08:57:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:57:14,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:14,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:57:14,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:57:14,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:57:14,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 08:57:14,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:57:14,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:57:14,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:57:14,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:57:14,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 08:57:14,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:57:14,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-25 08:57:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:57:14,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:14,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:57:14,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:57:14,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:57:14,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 08:57:14,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:57:14,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:57:14,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:57:14,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:57:14,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 08:57:14,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:57:14,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-25 08:57:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:57:14,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:14,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:57:14,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:57:14,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:57:14,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 08:57:14,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:57:14,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:57:14,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:57:14,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:57:14,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 08:57:14,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:57:14,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-25 08:57:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:57:14,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:14,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 08:57:14,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 08:57:14,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 08:57:14,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 08:57:14,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 08:57:14,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 1.0 [2020-09-25 08:57:14,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 08:57:14,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 08:57:14,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 08:57:14,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 08:57:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-25 08:57:14,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969038205] [2020-09-25 08:57:14,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 08:57:14,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 08:57:14,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776292131] [2020-09-25 08:57:14,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 08:57:14,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 08:57:14,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 08:57:14,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-09-25 08:57:14,636 INFO L87 Difference]: Start difference. First operand 255 states and 279 transitions. Second operand 20 states. [2020-09-25 08:57:17,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 08:57:17,696 INFO L93 Difference]: Finished difference Result 343 states and 377 transitions. [2020-09-25 08:57:17,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-25 08:57:17,697 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-09-25 08:57:17,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 08:57:17,701 INFO L225 Difference]: With dead ends: 343 [2020-09-25 08:57:17,702 INFO L226 Difference]: Without dead ends: 341 [2020-09-25 08:57:17,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=325, Invalid=1567, Unknown=0, NotChecked=0, Total=1892 [2020-09-25 08:57:17,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-09-25 08:57:17,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 298. [2020-09-25 08:57:17,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-09-25 08:57:17,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 327 transitions. [2020-09-25 08:57:17,726 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 327 transitions. Word has length 94 [2020-09-25 08:57:17,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 08:57:17,727 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 327 transitions. [2020-09-25 08:57:17,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 08:57:17,727 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 327 transitions. [2020-09-25 08:57:17,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-09-25 08:57:17,728 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 08:57:17,728 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 08:57:17,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 08:57:17,729 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 08:57:17,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 08:57:17,729 INFO L82 PathProgramCache]: Analyzing trace with hash 766068976, now seen corresponding path program 2 times [2020-09-25 08:57:17,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 08:57:17,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586929255] [2020-09-25 08:57:17,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 08:57:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 08:57:17,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:17,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:18,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 08:57:18,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking...