/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=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/invert_string-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 04:34:41,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 04:34:41,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 04:34:41,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 04:34:41,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 04:34:41,407 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 04:34:41,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 04:34:41,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 04:34:41,418 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 04:34:41,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 04:34:41,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 04:34:41,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 04:34:41,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 04:34:41,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 04:34:41,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 04:34:41,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 04:34:41,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 04:34:41,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 04:34:41,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 04:34:41,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 04:34:41,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 04:34:41,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 04:34:41,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 04:34:41,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 04:34:41,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 04:34:41,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 04:34:41,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 04:34:41,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 04:34:41,461 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 04:34:41,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 04:34:41,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 04:34:41,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 04:34:41,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 04:34:41,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 04:34:41,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 04:34:41,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 04:34:41,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 04:34:41,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 04:34:41,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 04:34:41,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 04:34:41,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 04:34:41,476 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 04:34:41,528 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 04:34:41,528 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 04:34:41,531 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 04:34:41,531 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 04:34:41,531 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 04:34:41,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 04:34:41,532 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 04:34:41,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 04:34:41,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 04:34:41,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 04:34:41,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 04:34:41,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 04:34:41,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 04:34:41,535 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 04:34:41,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 04:34:41,535 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 04:34:41,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 04:34:41,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 04:34:41,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 04:34:41,536 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 04:34:41,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 04:34:41,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 04:34:41,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 04:34:41,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 04:34:41,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 04:34:41,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 04:34:41,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 04:34:41,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 04:34:41,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 04:34:41,538 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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true; [2020-09-25 04:34:41,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 04:34:42,018 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 04:34:42,026 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 04:34:42,028 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 04:34:42,028 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 04:34:42,030 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-1.c [2020-09-25 04:34:42,113 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27067a3a0/dc6366535e1a49f6a9fef1cf4d72eba0/FLAG7982c5adb [2020-09-25 04:34:42,676 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 04:34:42,678 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/invert_string-1.c [2020-09-25 04:34:42,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27067a3a0/dc6366535e1a49f6a9fef1cf4d72eba0/FLAG7982c5adb [2020-09-25 04:34:43,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27067a3a0/dc6366535e1a49f6a9fef1cf4d72eba0 [2020-09-25 04:34:43,018 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 04:34:43,023 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 04:34:43,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 04:34:43,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 04:34:43,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 04:34:43,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:34:43" (1/1) ... [2020-09-25 04:34:43,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a33c50b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:43, skipping insertion in model container [2020-09-25 04:34:43,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:34:43" (1/1) ... [2020-09-25 04:34:43,042 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 04:34:43,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 04:34:43,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:34:43,301 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 04:34:43,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:34:43,357 INFO L208 MainTranslator]: Completed translation [2020-09-25 04:34:43,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:43 WrapperNode [2020-09-25 04:34:43,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 04:34:43,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 04:34:43,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 04:34:43,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 04:34:43,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:43" (1/1) ... [2020-09-25 04:34:43,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:43" (1/1) ... [2020-09-25 04:34:43,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:43" (1/1) ... [2020-09-25 04:34:43,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:43" (1/1) ... [2020-09-25 04:34:43,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:43" (1/1) ... [2020-09-25 04:34:43,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:43" (1/1) ... [2020-09-25 04:34:43,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:43" (1/1) ... [2020-09-25 04:34:43,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 04:34:43,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 04:34:43,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 04:34:43,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 04:34:43,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:43" (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 04:34:43,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 04:34:43,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 04:34:43,567 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 04:34:43,567 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 04:34:43,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 04:34:43,567 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 04:34:43,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 04:34:43,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 04:34:43,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 04:34:43,569 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 04:34:43,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 04:34:43,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 04:34:43,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 04:34:43,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 04:34:43,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 04:34:43,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 04:34:43,953 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 04:34:43,953 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 04:34:43,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:34:43 BoogieIcfgContainer [2020-09-25 04:34:43,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 04:34:43,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 04:34:43,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 04:34:43,964 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 04:34:43,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 04:34:43" (1/3) ... [2020-09-25 04:34:43,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d46ead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:34:43, skipping insertion in model container [2020-09-25 04:34:43,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:34:43" (2/3) ... [2020-09-25 04:34:43,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d46ead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:34:43, skipping insertion in model container [2020-09-25 04:34:43,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:34:43" (3/3) ... [2020-09-25 04:34:43,968 INFO L109 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2020-09-25 04:34:43,980 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 04:34:43,990 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 04:34:44,013 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 04:34:44,046 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 04:34:44,046 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 04:34:44,046 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 04:34:44,046 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 04:34:44,046 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 04:34:44,047 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 04:34:44,047 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 04:34:44,047 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 04:34:44,070 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-09-25 04:34:44,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 04:34:44,079 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:44,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:34:44,080 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:44,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:44,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1584943199, now seen corresponding path program 1 times [2020-09-25 04:34:44,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:44,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078224842] [2020-09-25 04:34:44,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:44,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:44,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:44,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:45,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:45,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 04:34:45,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 04:34:45,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-09-25 04:34:45,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:45,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:45,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:45,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 04:34:45,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:45,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 04:34:45,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:45,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:45,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:45,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:34:45,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:45,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 04:34:45,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:45,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:45,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:45,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:45,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:45,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:34:45,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078224842] [2020-09-25 04:34:45,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:34:45,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 04:34:45,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963273677] [2020-09-25 04:34:45,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 04:34:45,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:45,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 04:34:45,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 04:34:45,213 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 3 states. [2020-09-25 04:34:45,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:45,391 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2020-09-25 04:34:45,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 04:34:45,393 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-25 04:34:45,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:45,405 INFO L225 Difference]: With dead ends: 121 [2020-09-25 04:34:45,406 INFO L226 Difference]: Without dead ends: 57 [2020-09-25 04:34:45,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 04:34:45,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-25 04:34:45,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-09-25 04:34:45,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-25 04:34:45,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-09-25 04:34:45,466 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 31 [2020-09-25 04:34:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:45,467 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-09-25 04:34:45,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 04:34:45,468 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-09-25 04:34:45,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 04:34:45,469 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:45,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:34:45,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 04:34:45,470 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:45,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:45,471 INFO L82 PathProgramCache]: Analyzing trace with hash -318765620, now seen corresponding path program 1 times [2020-09-25 04:34:45,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:45,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635415902] [2020-09-25 04:34:45,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:45,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:45,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:45,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:45,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:45,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:45,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 04:34:45,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 04:34:45,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-09-25 04:34:45,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:45,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:45,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 04:34:45,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 04:34:45,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 04:34:45,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:45,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:45,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:46,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:46,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:34:46,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:46,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 04:34:46,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:46,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:46,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:46,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:46,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:46,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:34:46,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635415902] [2020-09-25 04:34:46,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:34:46,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 04:34:46,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105581091] [2020-09-25 04:34:46,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:34:46,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:46,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:34:46,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:34:46,015 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 5 states. [2020-09-25 04:34:46,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:46,194 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2020-09-25 04:34:46,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 04:34:46,195 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-09-25 04:34:46,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:46,199 INFO L225 Difference]: With dead ends: 95 [2020-09-25 04:34:46,199 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 04:34:46,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 04:34:46,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 04:34:46,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2020-09-25 04:34:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 04:34:46,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-25 04:34:46,217 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 31 [2020-09-25 04:34:46,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:46,218 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-25 04:34:46,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 04:34:46,218 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-25 04:34:46,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 04:34:46,220 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:46,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:34:46,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 04:34:46,220 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:46,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:46,221 INFO L82 PathProgramCache]: Analyzing trace with hash 419131922, now seen corresponding path program 1 times [2020-09-25 04:34:46,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:46,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978193143] [2020-09-25 04:34:46,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:46,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:46,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:46,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:46,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:46,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:47,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:48,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:48,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 04:34:48,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 04:34:48,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1808 [2020-09-25 04:34:48,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:48,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:48,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 04:34:48,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 04:34:48,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 04:34:48,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:48,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:48,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:48,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:48,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:34:48,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:48,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 04:34:48,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:48,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:48,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:48,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:48,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:48,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 04:34:48,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978193143] [2020-09-25 04:34:48,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:34:48,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 04:34:48,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711641426] [2020-09-25 04:34:48,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:34:48,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:48,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:34:48,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:34:48,101 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 5 states. [2020-09-25 04:34:48,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:48,267 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2020-09-25 04:34:48,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 04:34:48,268 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-09-25 04:34:48,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:48,269 INFO L225 Difference]: With dead ends: 102 [2020-09-25 04:34:48,269 INFO L226 Difference]: Without dead ends: 68 [2020-09-25 04:34:48,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 04:34:48,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-25 04:34:48,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2020-09-25 04:34:48,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-25 04:34:48,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-09-25 04:34:48,279 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 41 [2020-09-25 04:34:48,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:48,279 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-09-25 04:34:48,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 04:34:48,280 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-09-25 04:34:48,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 04:34:48,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:48,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:34:48,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 04:34:48,282 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:48,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:48,282 INFO L82 PathProgramCache]: Analyzing trace with hash -2141827952, now seen corresponding path program 1 times [2020-09-25 04:34:48,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:48,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821104731] [2020-09-25 04:34:48,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:48,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:48,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:48,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:49,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:50,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:51,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:51,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:51,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:53,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:53,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-25 04:34:53,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 04:34:53,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 04:34:53,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:53,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:53,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 04:34:53,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 04:34:53,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 04:34:53,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:53,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:34:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:53,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:53,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:34:53,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:34:53,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:34:53,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 04:34:53,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:34:53,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:34:53,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:34:53,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:34:53,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:34:53,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:34:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:34:53,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821104731] [2020-09-25 04:34:53,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:34:53,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 04:34:53,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718305175] [2020-09-25 04:34:53,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 04:34:53,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:34:53,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 04:34:53,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-09-25 04:34:53,672 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 17 states. [2020-09-25 04:34:54,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:34:54,996 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2020-09-25 04:34:54,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 04:34:54,996 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-09-25 04:34:54,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:34:54,999 INFO L225 Difference]: With dead ends: 164 [2020-09-25 04:34:55,000 INFO L226 Difference]: Without dead ends: 162 [2020-09-25 04:34:55,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2020-09-25 04:34:55,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-25 04:34:55,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 90. [2020-09-25 04:34:55,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-25 04:34:55,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-09-25 04:34:55,017 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 48 [2020-09-25 04:34:55,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:34:55,017 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-09-25 04:34:55,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 04:34:55,018 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-09-25 04:34:55,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 04:34:55,022 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:34:55,022 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:34:55,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 04:34:55,023 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:34:55,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:34:55,023 INFO L82 PathProgramCache]: Analyzing trace with hash -523876270, now seen corresponding path program 2 times [2020-09-25 04:34:55,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:34:55,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826522891] [2020-09-25 04:34:55,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:34:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:34:55,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:55,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:55,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:56,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:34:57,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:00,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:00,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 04:35:00,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 04:35:00,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 04:35:00,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:00,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:00,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 04:35:00,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 04:35:00,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 04:35:00,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:00,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:00,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:00,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:00,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:35:00,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:00,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 04:35:00,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:00,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:00,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:00,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:00,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:00,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:35:00,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826522891] [2020-09-25 04:35:00,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:35:00,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 04:35:00,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076500619] [2020-09-25 04:35:00,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 04:35:00,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:00,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 04:35:00,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 04:35:00,173 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 8 states. [2020-09-25 04:35:00,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:00,591 INFO L93 Difference]: Finished difference Result 166 states and 175 transitions. [2020-09-25 04:35:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 04:35:00,592 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-09-25 04:35:00,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:00,598 INFO L225 Difference]: With dead ends: 166 [2020-09-25 04:35:00,598 INFO L226 Difference]: Without dead ends: 146 [2020-09-25 04:35:00,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-25 04:35:00,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-25 04:35:00,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2020-09-25 04:35:00,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-25 04:35:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-09-25 04:35:00,627 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 55 [2020-09-25 04:35:00,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:00,627 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-09-25 04:35:00,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 04:35:00,628 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-09-25 04:35:00,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-25 04:35:00,630 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:00,631 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:35:00,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 04:35:00,631 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:00,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:00,632 INFO L82 PathProgramCache]: Analyzing trace with hash -2134174762, now seen corresponding path program 3 times [2020-09-25 04:35:00,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:00,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247473212] [2020-09-25 04:35:00,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:00,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:00,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:01,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:01,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:01,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:02,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:02,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:03,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:04,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:05,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:05,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 04:35:05,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 04:35:05,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-25 04:35:05,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:05,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:05,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 04:35:05,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 04:35:05,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 04:35:05,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 04:35:05,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:05,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:05,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:05,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:05,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:35:05,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:05,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 04:35:05,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:05,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:05,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:05,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:05,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:05,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:35:05,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247473212] [2020-09-25 04:35:05,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:35:05,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 04:35:05,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433988385] [2020-09-25 04:35:05,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 04:35:05,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:05,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 04:35:05,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-25 04:35:05,782 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 10 states. [2020-09-25 04:35:06,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:06,125 INFO L93 Difference]: Finished difference Result 165 states and 172 transitions. [2020-09-25 04:35:06,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 04:35:06,126 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-09-25 04:35:06,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:06,127 INFO L225 Difference]: With dead ends: 165 [2020-09-25 04:35:06,127 INFO L226 Difference]: Without dead ends: 135 [2020-09-25 04:35:06,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-09-25 04:35:06,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-25 04:35:06,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 100. [2020-09-25 04:35:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-25 04:35:06,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-09-25 04:35:06,145 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 58 [2020-09-25 04:35:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:06,147 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-09-25 04:35:06,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 04:35:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-09-25 04:35:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-25 04:35:06,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:06,149 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 04:35:06,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 04:35:06,150 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:06,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:06,151 INFO L82 PathProgramCache]: Analyzing trace with hash -280271430, now seen corresponding path program 1 times [2020-09-25 04:35:06,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:06,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515085301] [2020-09-25 04:35:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:06,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:06,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:07,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:07,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 04:35:07,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:35:07,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1627 [2020-09-25 04:35:07,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:07,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:07,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 04:35:07,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 04:35:07,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 04:35:07,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:07,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:07,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:07,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:07,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:35:07,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:07,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 04:35:07,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:07,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:07,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:07,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:07,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:07,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:07,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-25 04:35:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:07,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:07,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:07,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:35:07,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:07,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 04:35:07,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:07,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:07,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 04:35:07,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:07,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:35:07,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 04:35:07,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515085301] [2020-09-25 04:35:07,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:35:07,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 04:35:07,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647161616] [2020-09-25 04:35:07,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 04:35:07,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:07,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 04:35:07,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-25 04:35:07,962 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 10 states. [2020-09-25 04:35:08,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:08,315 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2020-09-25 04:35:08,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 04:35:08,315 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-09-25 04:35:08,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:08,317 INFO L225 Difference]: With dead ends: 143 [2020-09-25 04:35:08,317 INFO L226 Difference]: Without dead ends: 92 [2020-09-25 04:35:08,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-25 04:35:08,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-25 04:35:08,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2020-09-25 04:35:08,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-25 04:35:08,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-09-25 04:35:08,324 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 64 [2020-09-25 04:35:08,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:08,324 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-09-25 04:35:08,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 04:35:08,324 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-09-25 04:35:08,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-25 04:35:08,325 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:08,326 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1] [2020-09-25 04:35:08,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 04:35:08,326 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:08,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:08,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1930216728, now seen corresponding path program 4 times [2020-09-25 04:35:08,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:08,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327580316] [2020-09-25 04:35:08,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:08,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:08,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:08,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:08,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:09,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:09,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:10,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:10,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:11,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:11,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:11,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:13,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:13,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-09-25 04:35:13,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 04:35:13,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 04:35:13,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:13,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:13,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-25 04:35:13,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 04:35:13,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 04:35:13,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:14,014 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2020-09-25 04:35:14,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:14,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:14,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:14,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:35:14,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:14,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 04:35:14,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:14,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:14,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:14,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:14,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:14,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:35:14,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327580316] [2020-09-25 04:35:14,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:35:14,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-25 04:35:14,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536480446] [2020-09-25 04:35:14,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-25 04:35:14,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:14,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-25 04:35:14,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-09-25 04:35:14,264 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 23 states. [2020-09-25 04:35:16,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:16,216 INFO L93 Difference]: Finished difference Result 191 states and 200 transitions. [2020-09-25 04:35:16,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-25 04:35:16,217 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2020-09-25 04:35:16,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:16,219 INFO L225 Difference]: With dead ends: 191 [2020-09-25 04:35:16,219 INFO L226 Difference]: Without dead ends: 189 [2020-09-25 04:35:16,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=405, Invalid=2457, Unknown=0, NotChecked=0, Total=2862 [2020-09-25 04:35:16,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-25 04:35:16,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 117. [2020-09-25 04:35:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-25 04:35:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-09-25 04:35:16,229 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 65 [2020-09-25 04:35:16,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:16,230 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-09-25 04:35:16,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-25 04:35:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-09-25 04:35:16,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-25 04:35:16,231 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:16,231 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 04:35:16,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 04:35:16,231 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:16,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:16,232 INFO L82 PathProgramCache]: Analyzing trace with hash 499090838, now seen corresponding path program 5 times [2020-09-25 04:35:16,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:16,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425370688] [2020-09-25 04:35:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:16,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:16,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:16,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:17,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:17,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:19,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:19,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:21,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:21,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-25 04:35:21,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 04:35:21,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 04:35:21,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:21,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:21,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 04:35:21,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 04:35:21,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-25 04:35:21,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:21,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:35:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:21,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:21,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:21,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:35:21,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:35:21,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 04:35:21,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:21,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:35:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:35:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:35:21,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:35:21,361 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:35:21,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425370688] [2020-09-25 04:35:21,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:35:21,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 04:35:21,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080350029] [2020-09-25 04:35:21,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 04:35:21,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:35:21,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 04:35:21,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-25 04:35:21,369 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 11 states. [2020-09-25 04:35:21,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:35:21,906 INFO L93 Difference]: Finished difference Result 193 states and 202 transitions. [2020-09-25 04:35:21,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 04:35:21,907 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-09-25 04:35:21,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:35:21,909 INFO L225 Difference]: With dead ends: 193 [2020-09-25 04:35:21,909 INFO L226 Difference]: Without dead ends: 173 [2020-09-25 04:35:21,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-09-25 04:35:21,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-25 04:35:21,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 127. [2020-09-25 04:35:21,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-25 04:35:21,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2020-09-25 04:35:21,919 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 72 [2020-09-25 04:35:21,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:35:21,920 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2020-09-25 04:35:21,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 04:35:21,920 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2020-09-25 04:35:21,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-25 04:35:21,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:35:21,921 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-09-25 04:35:21,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 04:35:21,922 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:35:21,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:35:21,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1430946398, now seen corresponding path program 6 times [2020-09-25 04:35:21,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:35:21,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461472287] [2020-09-25 04:35:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:35:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:35:21,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:22,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:22,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:22,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:22,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:23,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:24,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:35:26,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:35:26,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 04:35:26,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 04:35:26,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 04:35:26,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:35:26,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:35:26,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 04:35:26,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 04:35:26,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 04:35:26,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0