/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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:30:51,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:30:51,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:30:51,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:30:51,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:30:51,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:30:51,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:30:51,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:30:51,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:30:51,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:30:51,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:30:51,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:30:51,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:30:51,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:30:51,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:30:51,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:30:51,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:30:51,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:30:51,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:30:51,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:30:51,538 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:30:51,539 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:30:51,541 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:30:51,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:30:51,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:30:51,545 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:30:51,545 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:30:51,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:30:51,547 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:30:51,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:30:51,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:30:51,549 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:30:51,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:30:51,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:30:51,552 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:30:51,553 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:30:51,554 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:30:51,554 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:30:51,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:30:51,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:30:51,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:30:51,557 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 21:30:51,584 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:30:51,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:30:51,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:30:51,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:30:51,586 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:30:51,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:30:51,587 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:30:51,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:30:51,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:30:51,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:30:51,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:30:51,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:30:51,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:30:51,588 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:30:51,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:30:51,588 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:30:51,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:30:51,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:30:51,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:30:51,589 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:30:51,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:30:51,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:30:51,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:30:51,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:30:51,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:30:51,591 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:30:51,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:30:51,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:30:51,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:30:51,591 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:30:52,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:30:52,109 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:30:52,114 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:30:52,116 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:30:52,116 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:30:52,117 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-09-24 21:30:52,206 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a588b6bc/98e03364f20442329f1f103a6b358f2d/FLAG98e175c10 [2020-09-24 21:30:52,786 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:30:52,787 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-09-24 21:30:52,798 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a588b6bc/98e03364f20442329f1f103a6b358f2d/FLAG98e175c10 [2020-09-24 21:30:53,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a588b6bc/98e03364f20442329f1f103a6b358f2d [2020-09-24 21:30:53,082 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:30:53,088 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:30:53,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:30:53,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:30:53,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:30:53,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:30:53" (1/1) ... [2020-09-24 21:30:53,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45368341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:53, skipping insertion in model container [2020-09-24 21:30:53,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:30:53" (1/1) ... [2020-09-24 21:30:53,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:30:53,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:30:53,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:30:53,407 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:30:53,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:30:53,557 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:30:53,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:53 WrapperNode [2020-09-24 21:30:53,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:30:53,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:30:53,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:30:53,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:30:53,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:53" (1/1) ... [2020-09-24 21:30:53,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:53" (1/1) ... [2020-09-24 21:30:53,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:53" (1/1) ... [2020-09-24 21:30:53,582 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:53" (1/1) ... [2020-09-24 21:30:53,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:53" (1/1) ... [2020-09-24 21:30:53,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:53" (1/1) ... [2020-09-24 21:30:53,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:53" (1/1) ... [2020-09-24 21:30:53,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:30:53,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:30:53,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:30:53,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:30:53,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:53" (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 21:30:53,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:30:53,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:30:53,688 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:30:53,688 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-09-24 21:30:53,688 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-09-24 21:30:53,688 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-09-24 21:30:53,688 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:30:53,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:30:53,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 21:30:53,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 21:30:53,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:30:53,689 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-09-24 21:30:53,690 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-09-24 21:30:53,690 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-09-24 21:30:53,690 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:30:53,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:30:53,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:30:54,300 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:30:54,300 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 21:30:54,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:30:54 BoogieIcfgContainer [2020-09-24 21:30:54,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:30:54,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:30:54,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:30:54,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:30:54,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:30:53" (1/3) ... [2020-09-24 21:30:54,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c093128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:30:54, skipping insertion in model container [2020-09-24 21:30:54,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:30:53" (2/3) ... [2020-09-24 21:30:54,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c093128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:30:54, skipping insertion in model container [2020-09-24 21:30:54,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:30:54" (3/3) ... [2020-09-24 21:30:54,318 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2020-09-24 21:30:54,331 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:30:54,343 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:30:54,365 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:30:54,393 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:30:54,393 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:30:54,394 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:30:54,394 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:30:54,394 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:30:54,394 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:30:54,394 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:30:54,394 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:30:54,419 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states. [2020-09-24 21:30:54,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-24 21:30:54,430 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:30:54,432 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:30:54,432 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:30:54,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:30:54,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1377121462, now seen corresponding path program 1 times [2020-09-24 21:30:54,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:30:54,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667137113] [2020-09-24 21:30:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:30:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:54,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:54,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:57,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:57,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:30:57,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-24 21:30:57,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:30:57,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2738 [2020-09-24 21:30:57,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:30:57,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 21:30:57,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-09-24 21:30:57,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-24 21:30:57,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:30:57,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:30:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:57,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:57,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:30:57,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:30:57,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:30:57,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:30:57,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:30:57,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:30:57,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:30:57,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:30:57,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:30:57,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 21:30:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:57,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:57,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:30:57,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:30:57,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:30:57,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:30:57,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:30:57,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:30:57,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:30:57,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:30:57,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:30:57,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 21:30:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:57,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:57,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:30:57,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:30:57,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:30:57,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-24 21:30:57,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:30:57,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:30:57,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:30:57,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:30:57,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:30:57,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 21:30:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:57,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:57,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:30:57,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:30:57,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:30:57,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 21:30:57,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:30:57,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:30:57,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:30:57,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 21:30:57,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:30:57,993 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-24 21:30:57,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667137113] [2020-09-24 21:30:57,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:30:57,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-24 21:30:57,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298956865] [2020-09-24 21:30:58,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 21:30:58,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:30:58,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 21:30:58,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:30:58,033 INFO L87 Difference]: Start difference. First operand 130 states. Second operand 15 states. [2020-09-24 21:30:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:30:58,584 INFO L93 Difference]: Finished difference Result 281 states and 357 transitions. [2020-09-24 21:30:58,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 21:30:58,587 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 81 [2020-09-24 21:30:58,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:30:58,605 INFO L225 Difference]: With dead ends: 281 [2020-09-24 21:30:58,605 INFO L226 Difference]: Without dead ends: 168 [2020-09-24 21:30:58,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:30:58,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-24 21:30:58,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 144. [2020-09-24 21:30:58,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-24 21:30:58,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 167 transitions. [2020-09-24 21:30:58,693 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 167 transitions. Word has length 81 [2020-09-24 21:30:58,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:30:58,694 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 167 transitions. [2020-09-24 21:30:58,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 21:30:58,695 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 167 transitions. [2020-09-24 21:30:58,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-24 21:30:58,708 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:30:58,709 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:30:58,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:30:58,715 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:30:58,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:30:58,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1823732666, now seen corresponding path program 1 times [2020-09-24 21:30:58,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:30:58,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898772171] [2020-09-24 21:30:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:30:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:58,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:58,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:59,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:30:59,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 21:30:59,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:30:59,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 828 [2020-09-24 21:30:59,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:30:59,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 21:30:59,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-09-24 21:30:59,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 21:30:59,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:30:59,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:30:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:59,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:59,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:30:59,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:30:59,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:30:59,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:30:59,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:30:59,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:30:59,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:30:59,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:30:59,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:30:59,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 21:30:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:59,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:59,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:30:59,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:30:59,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:30:59,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:30:59,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:30:59,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:30:59,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:30:59,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:30:59,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:30:59,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 21:30:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:59,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:59,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:30:59,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:30:59,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:30:59,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 21:30:59,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:30:59,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:30:59,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:30:59,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:30:59,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:30:59,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 21:30:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:30:59,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:30:59,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:30:59,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 21:30:59,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:30:59,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-24 21:30:59,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:30:59,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:30:59,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:30:59,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 21:30:59,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:30:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-24 21:30:59,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898772171] [2020-09-24 21:30:59,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:30:59,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:30:59,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201218153] [2020-09-24 21:30:59,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:30:59,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:30:59,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:30:59,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:30:59,996 INFO L87 Difference]: Start difference. First operand 144 states and 167 transitions. Second operand 13 states. [2020-09-24 21:31:00,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:00,372 INFO L93 Difference]: Finished difference Result 277 states and 328 transitions. [2020-09-24 21:31:00,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 21:31:00,373 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2020-09-24 21:31:00,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:00,377 INFO L225 Difference]: With dead ends: 277 [2020-09-24 21:31:00,377 INFO L226 Difference]: Without dead ends: 218 [2020-09-24 21:31:00,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:31:00,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-09-24 21:31:00,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 191. [2020-09-24 21:31:00,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-09-24 21:31:00,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 224 transitions. [2020-09-24 21:31:00,411 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 224 transitions. Word has length 85 [2020-09-24 21:31:00,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:00,412 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 224 transitions. [2020-09-24 21:31:00,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:31:00,412 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 224 transitions. [2020-09-24 21:31:00,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-24 21:31:00,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:00,416 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:31:00,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:31:00,417 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:00,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:00,417 INFO L82 PathProgramCache]: Analyzing trace with hash 646909882, now seen corresponding path program 2 times [2020-09-24 21:31:00,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:00,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541958837] [2020-09-24 21:31:00,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:00,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:00,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:01,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:01,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-24 21:31:01,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:31:01,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 914 [2020-09-24 21:31:01,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:01,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 21:31:01,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-09-24 21:31:01,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-24 21:31:01,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-24 21:31:01,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:01,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:01,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:01,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:01,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:01,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:01,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:01,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:01,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:01,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:01,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:01,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 21:31:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:01,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:01,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:01,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:01,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:01,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:31:01,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:01,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:01,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:01,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:01,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:01,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 21:31:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:01,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:01,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:01,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 21:31:01,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:01,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-24 21:31:01,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:01,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:31:01,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:01,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 21:31:01,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:01,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-24 21:31:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:01,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:01,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:01,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:01,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:01,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 21:31:01,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:01,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:31:01,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:01,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 21:31:01,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-24 21:31:01,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541958837] [2020-09-24 21:31:01,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:31:01,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 21:31:01,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083937165] [2020-09-24 21:31:01,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 21:31:01,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:01,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 21:31:01,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:31:01,891 INFO L87 Difference]: Start difference. First operand 191 states and 224 transitions. Second operand 17 states. [2020-09-24 21:31:02,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:02,345 INFO L93 Difference]: Finished difference Result 299 states and 354 transitions. [2020-09-24 21:31:02,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 21:31:02,346 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-09-24 21:31:02,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:02,350 INFO L225 Difference]: With dead ends: 299 [2020-09-24 21:31:02,350 INFO L226 Difference]: Without dead ends: 240 [2020-09-24 21:31:02,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:31:02,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-09-24 21:31:02,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 213. [2020-09-24 21:31:02,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-09-24 21:31:02,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 249 transitions. [2020-09-24 21:31:02,396 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 249 transitions. Word has length 85 [2020-09-24 21:31:02,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:02,396 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 249 transitions. [2020-09-24 21:31:02,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 21:31:02,397 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 249 transitions. [2020-09-24 21:31:02,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-24 21:31:02,398 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:02,398 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:31:02,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:31:02,401 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:02,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:02,402 INFO L82 PathProgramCache]: Analyzing trace with hash -955036012, now seen corresponding path program 1 times [2020-09-24 21:31:02,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:02,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389333006] [2020-09-24 21:31:02,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:02,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:02,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:02,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-09-24 21:31:02,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:02,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-09-24 21:31:02,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:02,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:31:02,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-09-24 21:31:02,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 21:31:02,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:02,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:02,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:02,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:02,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:02,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:02,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:02,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:02,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:02,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:02,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:02,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:02,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 21:31:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:02,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:02,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:02,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:02,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:02,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:31:02,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:02,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:02,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:02,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:02,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:02,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 21:31:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:02,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:02,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:02,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:02,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:02,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 21:31:02,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:02,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:31:02,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:02,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:31:02,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:02,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 21:31:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:02,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:02,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:02,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 21:31:02,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:02,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 21:31:02,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:02,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:31:02,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:02,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:31:02,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-09-24 21:31:02,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389333006] [2020-09-24 21:31:02,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:31:02,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 21:31:02,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361820314] [2020-09-24 21:31:02,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 21:31:02,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:02,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 21:31:02,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:31:02,925 INFO L87 Difference]: Start difference. First operand 213 states and 249 transitions. Second operand 9 states. [2020-09-24 21:31:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:03,110 INFO L93 Difference]: Finished difference Result 358 states and 417 transitions. [2020-09-24 21:31:03,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 21:31:03,111 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 86 [2020-09-24 21:31:03,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:03,115 INFO L225 Difference]: With dead ends: 358 [2020-09-24 21:31:03,115 INFO L226 Difference]: Without dead ends: 299 [2020-09-24 21:31:03,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-24 21:31:03,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-09-24 21:31:03,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 274. [2020-09-24 21:31:03,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-09-24 21:31:03,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 317 transitions. [2020-09-24 21:31:03,152 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 317 transitions. Word has length 86 [2020-09-24 21:31:03,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:03,154 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 317 transitions. [2020-09-24 21:31:03,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 21:31:03,154 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 317 transitions. [2020-09-24 21:31:03,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-24 21:31:03,163 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:03,163 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:31:03,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:31:03,164 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:03,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:03,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1996302692, now seen corresponding path program 2 times [2020-09-24 21:31:03,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:03,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525561339] [2020-09-24 21:31:03,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:03,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:03,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:03,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:03,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-09-24 21:31:03,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:03,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-09-24 21:31:03,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:03,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:31:03,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-09-24 21:31:03,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 21:31:03,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:03,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:03,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:03,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:03,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:03,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:03,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:03,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:03,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:03,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:03,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:03,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:03,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 21:31:03,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:03,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:03,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:03,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:03,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:03,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:31:03,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:03,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:03,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:03,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:03,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:03,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 21:31:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:03,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:03,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:03,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 21:31:03,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:03,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:31:03,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:03,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:03,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:03,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:03,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:03,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 21:31:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:03,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:03,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:03,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:03,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:03,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 21:31:03,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:03,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:31:03,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:03,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:31:03,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-09-24 21:31:03,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525561339] [2020-09-24 21:31:03,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:31:03,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 21:31:03,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443333564] [2020-09-24 21:31:03,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:31:03,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:03,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:31:03,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:31:03,610 INFO L87 Difference]: Start difference. First operand 274 states and 317 transitions. Second operand 8 states. [2020-09-24 21:31:03,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:03,762 INFO L93 Difference]: Finished difference Result 373 states and 433 transitions. [2020-09-24 21:31:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 21:31:03,764 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 86 [2020-09-24 21:31:03,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:03,771 INFO L225 Difference]: With dead ends: 373 [2020-09-24 21:31:03,771 INFO L226 Difference]: Without dead ends: 314 [2020-09-24 21:31:03,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:31:03,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-09-24 21:31:03,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 271. [2020-09-24 21:31:03,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-09-24 21:31:03,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 311 transitions. [2020-09-24 21:31:03,794 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 311 transitions. Word has length 86 [2020-09-24 21:31:03,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:03,795 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 311 transitions. [2020-09-24 21:31:03,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:31:03,795 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 311 transitions. [2020-09-24 21:31:03,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-09-24 21:31:03,796 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:03,797 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:31:03,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:31:03,797 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:03,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:03,798 INFO L82 PathProgramCache]: Analyzing trace with hash 808883757, now seen corresponding path program 1 times [2020-09-24 21:31:03,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:03,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144370897] [2020-09-24 21:31:03,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:03,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:04,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:05,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:05,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-09-24 21:31:05,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:31:05,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1440 [2020-09-24 21:31:05,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:05,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-24 21:31:05,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-09-24 21:31:05,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-09-24 21:31:05,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:05,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:05,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:05,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:05,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:05,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:05,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:05,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:05,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:05,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:05,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:05,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:05,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 21:31:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:05,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:05,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:05,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:05,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:05,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:05,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:05,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:05,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:05,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:05,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:05,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 21:31:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:05,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:05,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:05,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:05,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:05,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:31:05,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:05,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:31:05,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:05,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:31:05,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:05,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 21:31:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:05,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:05,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:05,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 21:31:05,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:05,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-24 21:31:05,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:05,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:31:05,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:05,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 21:31:05,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:06,008 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-24 21:31:06,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144370897] [2020-09-24 21:31:06,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:31:06,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 21:31:06,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917844440] [2020-09-24 21:31:06,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 21:31:06,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:06,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 21:31:06,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:31:06,014 INFO L87 Difference]: Start difference. First operand 271 states and 311 transitions. Second operand 20 states. [2020-09-24 21:31:06,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:06,667 INFO L93 Difference]: Finished difference Result 357 states and 412 transitions. [2020-09-24 21:31:06,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 21:31:06,668 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 88 [2020-09-24 21:31:06,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:06,670 INFO L225 Difference]: With dead ends: 357 [2020-09-24 21:31:06,671 INFO L226 Difference]: Without dead ends: 273 [2020-09-24 21:31:06,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2020-09-24 21:31:06,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-09-24 21:31:06,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 249. [2020-09-24 21:31:06,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-09-24 21:31:06,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 282 transitions. [2020-09-24 21:31:06,681 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 282 transitions. Word has length 88 [2020-09-24 21:31:06,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:06,682 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 282 transitions. [2020-09-24 21:31:06,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 21:31:06,682 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 282 transitions. [2020-09-24 21:31:06,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-24 21:31:06,684 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:06,684 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:31:06,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:31:06,684 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:06,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:06,685 INFO L82 PathProgramCache]: Analyzing trace with hash -289139437, now seen corresponding path program 1 times [2020-09-24 21:31:06,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:06,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333512573] [2020-09-24 21:31:06,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:06,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:06,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:07,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:07,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-24 21:31:07,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:07,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-09-24 21:31:07,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:07,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 21:31:07,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-09-24 21:31:07,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-24 21:31:07,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:07,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:07,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:07,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:07,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:07,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:07,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:07,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:07,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:07,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:07,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:07,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:31:07,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 21:31:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:07,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:07,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:07,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:07,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:07,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:31:07,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:07,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:07,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:07,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:07,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:07,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 21:31:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:07,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:07,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:07,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:07,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:07,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 21:31:07,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:07,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:31:07,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:07,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:31:07,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:07,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-24 21:31:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:07,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:07,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:07,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 21:31:07,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:07,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 21:31:07,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:07,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:31:07,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:07,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:31:07,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-09-24 21:31:07,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333512573] [2020-09-24 21:31:07,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:31:07,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 21:31:07,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904387877] [2020-09-24 21:31:07,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:31:07,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:07,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:31:07,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:31:07,245 INFO L87 Difference]: Start difference. First operand 249 states and 282 transitions. Second operand 10 states. [2020-09-24 21:31:07,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:07,507 INFO L93 Difference]: Finished difference Result 327 states and 372 transitions. [2020-09-24 21:31:07,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 21:31:07,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-09-24 21:31:07,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:07,511 INFO L225 Difference]: With dead ends: 327 [2020-09-24 21:31:07,511 INFO L226 Difference]: Without dead ends: 243 [2020-09-24 21:31:07,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:31:07,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-24 21:31:07,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 226. [2020-09-24 21:31:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-09-24 21:31:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 252 transitions. [2020-09-24 21:31:07,527 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 252 transitions. Word has length 89 [2020-09-24 21:31:07,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:07,528 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 252 transitions. [2020-09-24 21:31:07,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:31:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 252 transitions. [2020-09-24 21:31:07,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-24 21:31:07,529 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:07,530 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:31:07,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:31:07,530 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:07,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:07,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1795206334, now seen corresponding path program 3 times [2020-09-24 21:31:07,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:07,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209000674] [2020-09-24 21:31:07,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:07,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:08,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:08,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-09-24 21:31:08,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:08,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-09-24 21:31:08,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:08,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 21:31:08,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-09-24 21:31:08,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 21:31:08,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:31:08,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:31:08,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:08,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:08,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:08,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:31:08,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:08,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:31:08,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:08,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:08,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:08,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:08,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:08,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 21:31:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:08,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:08,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:08,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:31:08,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:08,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:31:08,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:08,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:31:08,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:08,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:31:08,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:08,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-24 21:31:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:08,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:08,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:08,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 21:31:08,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:08,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-24 21:31:08,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:08,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:31:08,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:08,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 21:31:08,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:08,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-24 21:31:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:31:08,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:31:08,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:31:08,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 21:31:08,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:31:08,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-24 21:31:08,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:31:08,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:31:08,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:31:08,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 21:31:08,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:31:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-09-24 21:31:08,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209000674] [2020-09-24 21:31:08,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:31:08,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-24 21:31:08,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663761233] [2020-09-24 21:31:08,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 21:31:08,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:31:08,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 21:31:08,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:31:08,775 INFO L87 Difference]: Start difference. First operand 226 states and 252 transitions. Second operand 15 states. [2020-09-24 21:31:09,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:31:09,352 INFO L93 Difference]: Finished difference Result 362 states and 418 transitions. [2020-09-24 21:31:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 21:31:09,353 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 89 [2020-09-24 21:31:09,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:31:09,356 INFO L225 Difference]: With dead ends: 362 [2020-09-24 21:31:09,356 INFO L226 Difference]: Without dead ends: 303 [2020-09-24 21:31:09,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:31:09,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-09-24 21:31:09,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 276. [2020-09-24 21:31:09,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-09-24 21:31:09,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 311 transitions. [2020-09-24 21:31:09,376 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 311 transitions. Word has length 89 [2020-09-24 21:31:09,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:31:09,376 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 311 transitions. [2020-09-24 21:31:09,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 21:31:09,377 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 311 transitions. [2020-09-24 21:31:09,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-24 21:31:09,379 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:31:09,379 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 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 21:31:09,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:31:09,379 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:31:09,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:31:09,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1839352304, now seen corresponding path program 1 times [2020-09-24 21:31:09,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:31:09,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379806547] [2020-09-24 21:31:09,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:31:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 21:31:09,407 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 21:31:09,407 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 21:31:09,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 21:31:09,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:31:09 BoogieIcfgContainer [2020-09-24 21:31:09,465 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 21:31:09,474 INFO L168 Benchmark]: Toolchain (without parser) took 16384.09 ms. Allocated memory was 139.5 MB in the beginning and 365.4 MB in the end (delta: 226.0 MB). Free memory was 101.2 MB in the beginning and 280.4 MB in the end (delta: -179.2 MB). Peak memory consumption was 46.8 MB. Max. memory is 7.1 GB. [2020-09-24 21:31:09,475 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 21:31:09,476 INFO L168 Benchmark]: CACSL2BoogieTranslator took 469.12 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 100.6 MB in the beginning and 180.8 MB in the end (delta: -80.2 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. [2020-09-24 21:31:09,477 INFO L168 Benchmark]: Boogie Preprocessor took 54.60 ms. Allocated memory is still 202.4 MB. Free memory was 180.8 MB in the beginning and 178.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-24 21:31:09,478 INFO L168 Benchmark]: RCFGBuilder took 693.77 ms. Allocated memory is still 202.4 MB. Free memory was 178.1 MB in the beginning and 147.1 MB in the end (delta: 31.0 MB). Peak memory consumption was 31.0 MB. Max. memory is 7.1 GB. [2020-09-24 21:31:09,481 INFO L168 Benchmark]: TraceAbstraction took 15157.45 ms. Allocated memory was 202.4 MB in the beginning and 365.4 MB in the end (delta: 163.1 MB). Free memory was 146.4 MB in the beginning and 280.4 MB in the end (delta: -134.0 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB. [2020-09-24 21:31:09,493 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 469.12 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 100.6 MB in the beginning and 180.8 MB in the end (delta: -80.2 MB). Peak memory consumption was 24.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 54.60 ms. Allocated memory is still 202.4 MB. Free memory was 180.8 MB in the beginning and 178.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 693.77 ms. Allocated memory is still 202.4 MB. Free memory was 178.1 MB in the beginning and 147.1 MB in the end (delta: 31.0 MB). Peak memory consumption was 31.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15157.45 ms. Allocated memory was 202.4 MB in the beginning and 365.4 MB in the end (delta: 163.1 MB). Free memory was 146.4 MB in the beginning and 280.4 MB in the end (delta: -134.0 MB). Peak memory consumption was 29.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 7]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 103, overapproximation of bitwiseAnd at line 101. Possible FailurePath: [L216] unsigned int a ; [L217] unsigned int ma = __VERIFIER_nondet_uint(); [L218] signed char ea = __VERIFIER_nondet_char(); [L219] unsigned int b ; [L220] unsigned int mb = __VERIFIER_nondet_uint(); [L221] signed char eb = __VERIFIER_nondet_char(); [L222] unsigned int r_add1 ; [L223] unsigned int r_add2 ; [L224] unsigned int zero ; [L225] int tmp ; [L226] int tmp___0 ; [L227] int __retres14 ; [L231] CALL, EXPR base2flt(0, 0) [L15] unsigned int res ; [L16] unsigned int __retres4 ; [L19] COND TRUE ! m [L20] __retres4 = 0U [L70] return (__retres4); [L231] RET, EXPR base2flt(0, 0) [L231] zero = base2flt(0, 0) [L232] CALL, EXPR base2flt(ma, ea) [L15] unsigned int res ; [L16] unsigned int __retres4 ; [L19] COND FALSE !(! m) [L25] COND FALSE !(m < 1U << 24U) [L47] COND TRUE 1 [L49] COND TRUE m >= 1U << 25U [L54] COND TRUE e >= 127 [L55] __retres4 = 4294967295U [L70] return (__retres4); [L232] RET, EXPR base2flt(ma, ea) [L232] a = base2flt(ma, ea) [L233] CALL, EXPR base2flt(mb, eb) [L15] unsigned int res ; [L16] unsigned int __retres4 ; [L19] COND FALSE !(! m) [L25] COND FALSE !(m < 1U << 24U) [L47] COND TRUE 1 [L49] COND FALSE !(m >= 1U << 25U) [L66] m = m & ~ (1U << 24U) [L67] res = m | ((unsigned int )(e + 128) << 24U) [L68] __retres4 = res [L70] return (__retres4); [L233] RET, EXPR base2flt(mb, eb) [L233] b = base2flt(mb, eb) [L234] CALL addflt(a, b) [L74] unsigned int res ; [L75] unsigned int ma ; [L76] unsigned int mb ; [L77] unsigned int delta ; [L78] int ea ; [L79] int eb ; [L80] unsigned int tmp ; [L81] unsigned int __retres10 ; [L84] COND FALSE !(a < b) [L91] COND FALSE !(! b) [L98] ma = a & ((1U << 24U) - 1U) [L99] ea = (int )(a >> 24U) - 128 [L100] ma = ma | (1U << 24U) [L101] mb = b & ((1U << 24U) - 1U) [L102] eb = (int )(b >> 24U) - 128 [L103] mb = mb | (1U << 24U) [L104] CALL __VERIFIER_assert(ea >= eb) [L6] COND TRUE !(cond) [L7] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 169 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 15.0s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1227 SDtfs, 630 SDslu, 13164 SDs, 0 SdLazy, 1417 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 223 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=276occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 214 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 10.7s InterpolantComputationTime, 779 NumberOfCodeBlocks, 779 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 681 ConstructedInterpolants, 0 QuantifiedInterpolants, 199861 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 191/206 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...