/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 log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:21:04,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:21:04,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:21:04,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:21:04,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:21:04,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:21:04,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:21:04,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:21:04,470 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:21:04,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:21:04,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:21:04,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:21:04,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:21:04,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:21:04,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:21:04,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:21:04,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:21:04,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:21:04,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:21:04,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:21:04,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:21:04,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:21:04,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:21:04,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:21:04,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:21:04,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:21:04,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:21:04,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:21:04,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:21:04,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:21:04,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:21:04,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:21:04,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:21:04,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:21:04,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:21:04,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:21:04,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:21:04,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:21:04,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:21:04,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:21:04,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:21:04,527 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 [2020-09-24 17:21:04,579 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:21:04,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:21:04,582 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:21:04,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:21:04,583 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:21:04,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:21:04,583 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:21:04,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:21:04,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:21:04,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:21:04,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:21:04,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:21:04,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:21:04,586 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:21:04,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:21:04,587 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:21:04,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:21:04,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:21:04,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:21:04,587 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:21:04,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:21:04,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:21:04,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:21:04,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:21:04,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:21:04,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:21:04,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:21:04,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:21:04,589 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:21:04,590 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;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;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;log-additional-information=true; [2020-09-24 17:21:05,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:21:05,097 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:21:05,101 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:21:05,103 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:21:05,103 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:21:05,105 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i [2020-09-24 17:21:05,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7ad928fe/4d6a4016991744448afa0d1c42cb4c3f/FLAGa901fffb1 [2020-09-24 17:21:05,705 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:21:05,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i [2020-09-24 17:21:05,714 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7ad928fe/4d6a4016991744448afa0d1c42cb4c3f/FLAGa901fffb1 [2020-09-24 17:21:06,031 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f7ad928fe/4d6a4016991744448afa0d1c42cb4c3f [2020-09-24 17:21:06,045 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:21:06,054 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:21:06,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:21:06,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:21:06,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:21:06,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:21:06" (1/1) ... [2020-09-24 17:21:06,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a765448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:06, skipping insertion in model container [2020-09-24 17:21:06,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:21:06" (1/1) ... [2020-09-24 17:21:06,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:21:06,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:21:06,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:21:06,400 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:21:06,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:21:06,449 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:21:06,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:06 WrapperNode [2020-09-24 17:21:06,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:21:06,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:21:06,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:21:06,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:21:06,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:06" (1/1) ... [2020-09-24 17:21:06,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:06" (1/1) ... [2020-09-24 17:21:06,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:06" (1/1) ... [2020-09-24 17:21:06,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:06" (1/1) ... [2020-09-24 17:21:06,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:06" (1/1) ... [2020-09-24 17:21:06,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:06" (1/1) ... [2020-09-24 17:21:06,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:06" (1/1) ... [2020-09-24 17:21:06,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:21:06,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:21:06,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:21:06,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:21:06,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:06" (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 [2020-09-24 17:21:06,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:21:06,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:21:06,661 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 17:21:06,661 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 17:21:06,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:21:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:21:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 17:21:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 17:21:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 17:21:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 17:21:06,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:21:06,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 17:21:06,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 17:21:06,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 17:21:06,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:21:06,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:21:06,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 17:21:06,992 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:21:06,992 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 17:21:06,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:21:06 BoogieIcfgContainer [2020-09-24 17:21:06,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:21:07,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:21:07,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:21:07,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:21:07,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:21:06" (1/3) ... [2020-09-24 17:21:07,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e46d27d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:21:07, skipping insertion in model container [2020-09-24 17:21:07,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:21:06" (2/3) ... [2020-09-24 17:21:07,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e46d27d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:21:07, skipping insertion in model container [2020-09-24 17:21:07,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:21:06" (3/3) ... [2020-09-24 17:21:07,009 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i [2020-09-24 17:21:07,024 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:21:07,035 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:21:07,060 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:21:07,094 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:21:07,095 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:21:07,095 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:21:07,095 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:21:07,095 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:21:07,095 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:21:07,096 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:21:07,096 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:21:07,122 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-09-24 17:21:07,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-24 17:21:07,131 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:21:07,132 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] [2020-09-24 17:21:07,133 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:21:07,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:21:07,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1727331883, now seen corresponding path program 1 times [2020-09-24 17:21:07,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:21:07,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713761871] [2020-09-24 17:21:07,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:21:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:07,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:07,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:08,360 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:08,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 17:21:08,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:21:08,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1026 [2020-09-24 17:21:08,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:08,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 17:21:08,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 17:21:08,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 17:21:08,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:21:08,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:21:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:08,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:08,646 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:08,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:21:08,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:21:08,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 17:21:08,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:08,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:21:08,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:21:08,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:21:08,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:21:08,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 17:21:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:08,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:08,674 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:08,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:21:08,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:21:08,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 17:21:08,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:08,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:21:08,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:21:08,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:21:08,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:21:08,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 17:21:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:08,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:08,733 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:08,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:21:08,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:21:08,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 17:21:08,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:08,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:21:08,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:21:08,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:21:08,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:21:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 17:21:08,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713761871] [2020-09-24 17:21:08,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:21:08,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 17:21:08,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211380430] [2020-09-24 17:21:08,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 17:21:08,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:21:08,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 17:21:08,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-24 17:21:08,798 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 9 states. [2020-09-24 17:21:09,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:21:09,301 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2020-09-24 17:21:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 17:21:09,303 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-09-24 17:21:09,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:21:09,317 INFO L225 Difference]: With dead ends: 137 [2020-09-24 17:21:09,318 INFO L226 Difference]: Without dead ends: 79 [2020-09-24 17:21:09,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-09-24 17:21:09,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-24 17:21:09,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2020-09-24 17:21:09,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 17:21:09,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-09-24 17:21:09,388 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 30 [2020-09-24 17:21:09,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:21:09,389 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-09-24 17:21:09,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 17:21:09,389 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-09-24 17:21:09,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 17:21:09,392 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:21:09,392 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] [2020-09-24 17:21:09,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:21:09,393 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:21:09,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:21:09,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1086220015, now seen corresponding path program 1 times [2020-09-24 17:21:09,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:21:09,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386816742] [2020-09-24 17:21:09,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:21:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:09,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:09,482 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:09,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 17:21:09,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:21:09,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-09-24 17:21:09,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:09,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:21:09,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 17:21:09,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 17:21:09,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:21:09,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:21:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:09,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:09,555 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:09,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:21:09,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:21:09,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:21:09,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:09,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:21:09,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:21:09,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:21:09,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:21:09,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 17:21:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:09,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:09,582 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:09,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:21:09,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:21:09,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 17:21:09,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:09,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:21:09,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:21:09,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:21:09,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:21:09,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 17:21:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:09,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:09,604 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:09,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:21:09,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:21:09,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 17:21:09,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:09,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:21:09,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:21:09,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:21:09,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:21:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 17:21:09,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386816742] [2020-09-24 17:21:09,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:21:09,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 17:21:09,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753957876] [2020-09-24 17:21:09,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 17:21:09,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:21:09,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 17:21:09,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:21:09,616 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 4 states. [2020-09-24 17:21:09,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:21:09,751 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2020-09-24 17:21:09,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 17:21:09,752 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-09-24 17:21:09,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:21:09,754 INFO L225 Difference]: With dead ends: 91 [2020-09-24 17:21:09,754 INFO L226 Difference]: Without dead ends: 72 [2020-09-24 17:21:09,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:21:09,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-24 17:21:09,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2020-09-24 17:21:09,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 17:21:09,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-09-24 17:21:09,768 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 34 [2020-09-24 17:21:09,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:21:09,768 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-09-24 17:21:09,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 17:21:09,769 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-09-24 17:21:09,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 17:21:09,772 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:21:09,772 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-09-24 17:21:09,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:21:09,772 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:21:09,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:21:09,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1811286385, now seen corresponding path program 1 times [2020-09-24 17:21:09,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:21:09,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438552198] [2020-09-24 17:21:09,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:21:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:09,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:10,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:10,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:10,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:15,510 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:15,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 17:21:15,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:21:15,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5690 [2020-09-24 17:21:15,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:15,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 17:21:15,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-09-24 17:21:15,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 17:21:15,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:21:15,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:21:15,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:15,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:15,703 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:15,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:21:15,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:21:15,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:21:15,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:15,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:21:15,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:21:15,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:21:15,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:21:15,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-24 17:21:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:15,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:15,713 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:15,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:21:15,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:21:15,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:21:15,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:21:15,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:21:15,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:21:15,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:21:15,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-24 17:21:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:15,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:15,723 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:15,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:21:15,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:21:15,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:21:15,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:15,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:21:15,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:21:15,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:21:15,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:21:15,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-24 17:21:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:15,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:15,759 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:15,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:21:15,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:21:15,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 17:21:15,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:15,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:21:15,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:21:15,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:21:15,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:21:15,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-24 17:21:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:15,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:15,852 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:15,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 17:21:15,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:21:15,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 17:21:15,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:15,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:21:15,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:21:15,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:21:15,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:21:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-24 17:21:15,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438552198] [2020-09-24 17:21:15,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:21:15,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 17:21:15,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081655470] [2020-09-24 17:21:15,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 17:21:15,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:21:15,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 17:21:15,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-24 17:21:15,873 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 11 states. [2020-09-24 17:21:16,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:21:16,552 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-09-24 17:21:16,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 17:21:16,553 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-09-24 17:21:16,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:21:16,554 INFO L225 Difference]: With dead ends: 82 [2020-09-24 17:21:16,554 INFO L226 Difference]: Without dead ends: 80 [2020-09-24 17:21:16,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-09-24 17:21:16,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-24 17:21:16,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2020-09-24 17:21:16,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-24 17:21:16,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-09-24 17:21:16,568 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 52 [2020-09-24 17:21:16,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:21:16,568 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-09-24 17:21:16,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 17:21:16,569 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-09-24 17:21:16,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-24 17:21:16,570 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:21:16,571 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-09-24 17:21:16,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:21:16,571 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:21:16,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:21:16,572 INFO L82 PathProgramCache]: Analyzing trace with hash 2082234165, now seen corresponding path program 1 times [2020-09-24 17:21:16,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:21:16,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962566682] [2020-09-24 17:21:16,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:21:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:21:16,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:17,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:21:19,297 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:21:19,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 17:21:19,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:21:19,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2673 [2020-09-24 17:21:19,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:21:19,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 17:21:19,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-09-24 17:21:19,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-24 17:21:19,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:21:20,147 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 49 [2020-09-24 17:21:31,582 WARN L193 SmtUtils]: Spent 11.39 s on a formula simplification. DAG size of input: 139 DAG size of output: 87 [2020-09-24 17:21:43,052 WARN L193 SmtUtils]: Spent 11.39 s on a formula simplification. DAG size of input: 147 DAG size of output: 100 [2020-09-24 17:21:50,813 WARN L193 SmtUtils]: Spent 7.68 s on a formula simplification. DAG size of input: 256 DAG size of output: 102 [2020-09-24 17:22:01,884 WARN L193 SmtUtils]: Spent 10.98 s on a formula simplification. DAG size of input: 129 DAG size of output: 93 [2020-09-24 17:22:09,123 WARN L193 SmtUtils]: Spent 7.15 s on a formula simplification. DAG size of input: 134 DAG size of output: 87