/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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 0.1.25-177f698 [2020-08-21 16:29:37,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:29:37,291 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:29:37,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:29:37,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:29:37,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:29:37,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:29:37,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:29:37,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:29:37,355 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:29:37,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:29:37,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:29:37,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:29:37,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:29:37,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:29:37,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:29:37,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:29:37,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:29:37,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:29:37,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:29:37,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:29:37,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:29:37,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:29:37,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:29:37,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:29:37,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:29:37,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:29:37,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:29:37,389 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:29:37,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 16:29:37,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 16:29:37,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 16:29:37,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 16:29:37,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 16:29:37,394 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 16:29:37,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 16:29:37,395 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 16:29:37,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 16:29:37,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:29:37,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:29:37,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:29:37,399 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 [2020-08-21 16:29:37,439 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:29:37,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:29:37,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:29:37,442 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:29:37,442 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:29:37,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:29:37,443 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:29:37,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:29:37,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:29:37,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:29:37,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:29:37,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:29:37,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:29:37,445 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:29:37,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:29:37,445 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:29:37,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:29:37,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:29:37,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:29:37,446 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:29:37,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:29:37,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:29:37,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:29:37,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:29:37,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:29:37,447 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:29:37,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:29:37,448 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:29:37,448 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:29:37,448 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:29:37,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:29:37,761 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:29:37,764 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:29:37,766 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:29:37,766 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:29:37,767 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-08-21 16:29:37,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/49fae9f7c/6db4ce005d1542d3ad775b4f0e95e4ff/FLAG7d562a9be [2020-08-21 16:29:38,297 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:29:38,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-08-21 16:29:38,305 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/49fae9f7c/6db4ce005d1542d3ad775b4f0e95e4ff/FLAG7d562a9be [2020-08-21 16:29:38,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/49fae9f7c/6db4ce005d1542d3ad775b4f0e95e4ff [2020-08-21 16:29:38,711 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:29:38,712 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:29:38,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:29:38,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:29:38,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:29:38,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:29:38" (1/1) ... [2020-08-21 16:29:38,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71adb4dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:29:38, skipping insertion in model container [2020-08-21 16:29:38,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:29:38" (1/1) ... [2020-08-21 16:29:38,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:29:38,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:29:38,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:29:38,984 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:29:39,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:29:39,115 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:29:39,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:29:39 WrapperNode [2020-08-21 16:29:39,116 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:29:39,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:29:39,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:29:39,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:29:39,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:29:39" (1/1) ... [2020-08-21 16:29:39,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:29:39" (1/1) ... [2020-08-21 16:29:39,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:29:39" (1/1) ... [2020-08-21 16:29:39,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:29:39" (1/1) ... [2020-08-21 16:29:39,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:29:39" (1/1) ... [2020-08-21 16:29:39,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:29:39" (1/1) ... [2020-08-21 16:29:39,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:29:39" (1/1) ... [2020-08-21 16:29:39,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:29:39,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:29:39,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:29:39,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:29:39,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:29:39" (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 [2020-08-21 16:29:39,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:29:39,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:29:39,215 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 16:29:39,215 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-21 16:29:39,216 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-21 16:29:39,216 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-21 16:29:39,216 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:29:39,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:29:39,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 16:29:39,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 16:29:39,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 16:29:39,217 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-21 16:29:39,217 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-21 16:29:39,217 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-21 16:29:39,217 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:29:39,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:29:39,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:29:39,637 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:29:39,637 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-21 16:29:39,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:29:39 BoogieIcfgContainer [2020-08-21 16:29:39,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:29:39,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:29:39,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:29:39,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:29:39,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:29:38" (1/3) ... [2020-08-21 16:29:39,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187528f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:29:39, skipping insertion in model container [2020-08-21 16:29:39,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:29:39" (2/3) ... [2020-08-21 16:29:39,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@187528f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:29:39, skipping insertion in model container [2020-08-21 16:29:39,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:29:39" (3/3) ... [2020-08-21 16:29:39,649 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2020-08-21 16:29:39,659 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:29:39,667 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:29:39,680 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:29:39,700 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:29:39,701 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:29:39,701 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:29:39,701 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:29:39,701 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:29:39,701 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:29:39,701 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:29:39,701 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:29:39,717 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-08-21 16:29:39,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 16:29:39,724 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:29:39,725 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 16:29:39,725 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:29:39,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:29:39,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1312098946, now seen corresponding path program 1 times [2020-08-21 16:29:39,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:29:39,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371944816] [2020-08-21 16:29:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:29:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:40,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:29:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:40,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:29:40,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:40,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:29:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:40,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 16:29:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-21 16:29:40,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371944816] [2020-08-21 16:29:40,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:29:40,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 16:29:40,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325390948] [2020-08-21 16:29:40,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:29:40,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:29:40,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:29:40,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:29:40,219 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 9 states. [2020-08-21 16:29:40,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:29:40,454 INFO L93 Difference]: Finished difference Result 146 states and 224 transitions. [2020-08-21 16:29:40,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 16:29:40,457 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-08-21 16:29:40,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:29:40,470 INFO L225 Difference]: With dead ends: 146 [2020-08-21 16:29:40,470 INFO L226 Difference]: Without dead ends: 86 [2020-08-21 16:29:40,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:29:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-21 16:29:40,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-08-21 16:29:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 16:29:40,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2020-08-21 16:29:40,536 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 34 [2020-08-21 16:29:40,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:29:40,537 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2020-08-21 16:29:40,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:29:40,537 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2020-08-21 16:29:40,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 16:29:40,540 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:29:40,541 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 16:29:40,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:29:40,541 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:29:40,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:29:40,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1254840644, now seen corresponding path program 1 times [2020-08-21 16:29:40,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:29:40,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334311992] [2020-08-21 16:29:40,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:29:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:40,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:29:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:40,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:29:40,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:40,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:29:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:40,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 16:29:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-21 16:29:40,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334311992] [2020-08-21 16:29:40,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:29:40,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 16:29:40,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835131426] [2020-08-21 16:29:40,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:29:40,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:29:40,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:29:40,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:29:40,771 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand 8 states. [2020-08-21 16:29:40,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:29:40,903 INFO L93 Difference]: Finished difference Result 140 states and 193 transitions. [2020-08-21 16:29:40,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 16:29:40,905 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-08-21 16:29:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:29:40,908 INFO L225 Difference]: With dead ends: 140 [2020-08-21 16:29:40,909 INFO L226 Difference]: Without dead ends: 99 [2020-08-21 16:29:40,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:29:40,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-21 16:29:40,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 84. [2020-08-21 16:29:40,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-21 16:29:40,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 114 transitions. [2020-08-21 16:29:40,946 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 114 transitions. Word has length 34 [2020-08-21 16:29:40,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:29:40,948 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 114 transitions. [2020-08-21 16:29:40,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:29:40,949 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 114 transitions. [2020-08-21 16:29:40,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 16:29:40,952 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:29:40,953 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:29:40,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:29:40,953 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:29:40,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:29:40,954 INFO L82 PathProgramCache]: Analyzing trace with hash 894544493, now seen corresponding path program 1 times [2020-08-21 16:29:40,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:29:40,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492910739] [2020-08-21 16:29:40,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:29:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:41,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:29:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:41,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:29:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:41,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:29:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:41,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 16:29:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 16:29:41,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492910739] [2020-08-21 16:29:41,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:29:41,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 16:29:41,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889523512] [2020-08-21 16:29:41,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 16:29:41,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:29:41,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 16:29:41,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:29:41,210 INFO L87 Difference]: Start difference. First operand 84 states and 114 transitions. Second operand 12 states. [2020-08-21 16:29:41,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:29:41,423 INFO L93 Difference]: Finished difference Result 152 states and 209 transitions. [2020-08-21 16:29:41,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 16:29:41,424 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-08-21 16:29:41,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:29:41,426 INFO L225 Difference]: With dead ends: 152 [2020-08-21 16:29:41,426 INFO L226 Difference]: Without dead ends: 111 [2020-08-21 16:29:41,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-08-21 16:29:41,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-21 16:29:41,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 95. [2020-08-21 16:29:41,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-21 16:29:41,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 128 transitions. [2020-08-21 16:29:41,442 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 128 transitions. Word has length 38 [2020-08-21 16:29:41,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:29:41,443 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 128 transitions. [2020-08-21 16:29:41,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 16:29:41,444 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 128 transitions. [2020-08-21 16:29:41,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 16:29:41,446 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:29:41,446 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:29:41,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:29:41,446 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:29:41,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:29:41,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1876990799, now seen corresponding path program 1 times [2020-08-21 16:29:41,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:29:41,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581143493] [2020-08-21 16:29:41,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:29:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:41,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:29:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:41,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:29:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:41,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:29:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:41,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 16:29:41,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-21 16:29:41,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581143493] [2020-08-21 16:29:41,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:29:41,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 16:29:41,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154224107] [2020-08-21 16:29:41,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:29:41,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:29:41,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:29:41,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:29:41,628 INFO L87 Difference]: Start difference. First operand 95 states and 128 transitions. Second operand 9 states. [2020-08-21 16:29:41,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:29:41,783 INFO L93 Difference]: Finished difference Result 147 states and 194 transitions. [2020-08-21 16:29:41,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 16:29:41,784 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-08-21 16:29:41,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:29:41,786 INFO L225 Difference]: With dead ends: 147 [2020-08-21 16:29:41,787 INFO L226 Difference]: Without dead ends: 107 [2020-08-21 16:29:41,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-21 16:29:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-08-21 16:29:41,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-08-21 16:29:41,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-21 16:29:41,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 111 transitions. [2020-08-21 16:29:41,828 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 111 transitions. Word has length 38 [2020-08-21 16:29:41,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:29:41,828 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 111 transitions. [2020-08-21 16:29:41,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:29:41,828 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 111 transitions. [2020-08-21 16:29:41,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-21 16:29:41,833 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:29:41,833 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:29:41,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:29:41,833 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:29:41,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:29:41,840 INFO L82 PathProgramCache]: Analyzing trace with hash 2083243036, now seen corresponding path program 1 times [2020-08-21 16:29:41,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:29:41,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133743917] [2020-08-21 16:29:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:29:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:41,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:29:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:41,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:29:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:41,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:29:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:41,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 16:29:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:42,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 16:29:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-21 16:29:42,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133743917] [2020-08-21 16:29:42,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:29:42,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 16:29:42,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442049203] [2020-08-21 16:29:42,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:29:42,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:29:42,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:29:42,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:29:42,022 INFO L87 Difference]: Start difference. First operand 85 states and 111 transitions. Second operand 9 states. [2020-08-21 16:29:42,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:29:42,168 INFO L93 Difference]: Finished difference Result 134 states and 178 transitions. [2020-08-21 16:29:42,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 16:29:42,169 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-08-21 16:29:42,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:29:42,171 INFO L225 Difference]: With dead ends: 134 [2020-08-21 16:29:42,171 INFO L226 Difference]: Without dead ends: 111 [2020-08-21 16:29:42,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:29:42,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-21 16:29:42,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2020-08-21 16:29:42,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-21 16:29:42,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2020-08-21 16:29:42,184 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 42 [2020-08-21 16:29:42,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:29:42,184 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2020-08-21 16:29:42,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:29:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2020-08-21 16:29:42,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-21 16:29:42,186 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:29:42,186 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 16:29:42,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:29:42,187 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:29:42,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:29:42,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2140501338, now seen corresponding path program 1 times [2020-08-21 16:29:42,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:29:42,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344329885] [2020-08-21 16:29:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:29:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:42,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:29:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:42,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:29:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:42,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:29:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:42,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 16:29:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:42,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 16:29:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-21 16:29:42,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344329885] [2020-08-21 16:29:42,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:29:42,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 16:29:42,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271522302] [2020-08-21 16:29:42,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:29:42,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:29:42,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:29:42,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:29:42,318 INFO L87 Difference]: Start difference. First operand 103 states and 137 transitions. Second operand 8 states. [2020-08-21 16:29:42,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:29:42,402 INFO L93 Difference]: Finished difference Result 163 states and 218 transitions. [2020-08-21 16:29:42,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 16:29:42,403 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-08-21 16:29:42,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:29:42,404 INFO L225 Difference]: With dead ends: 163 [2020-08-21 16:29:42,405 INFO L226 Difference]: Without dead ends: 126 [2020-08-21 16:29:42,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:29:42,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-21 16:29:42,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 113. [2020-08-21 16:29:42,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-21 16:29:42,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 148 transitions. [2020-08-21 16:29:42,417 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 148 transitions. Word has length 42 [2020-08-21 16:29:42,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:29:42,417 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 148 transitions. [2020-08-21 16:29:42,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:29:42,418 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 148 transitions. [2020-08-21 16:29:42,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-21 16:29:42,419 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:29:42,419 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-08-21 16:29:42,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:29:42,420 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:29:42,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:29:42,420 INFO L82 PathProgramCache]: Analyzing trace with hash 424074718, now seen corresponding path program 1 times [2020-08-21 16:29:42,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:29:42,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320553311] [2020-08-21 16:29:42,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:29:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:42,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:29:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:42,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:29:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:42,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:29:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:42,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 16:29:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-21 16:29:42,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320553311] [2020-08-21 16:29:42,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:29:42,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 16:29:42,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230010249] [2020-08-21 16:29:42,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:29:42,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:29:42,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:29:42,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:29:42,554 INFO L87 Difference]: Start difference. First operand 113 states and 148 transitions. Second operand 8 states. [2020-08-21 16:29:42,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:29:42,655 INFO L93 Difference]: Finished difference Result 177 states and 237 transitions. [2020-08-21 16:29:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 16:29:42,655 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-08-21 16:29:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:29:42,657 INFO L225 Difference]: With dead ends: 177 [2020-08-21 16:29:42,657 INFO L226 Difference]: Without dead ends: 149 [2020-08-21 16:29:42,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:29:42,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-21 16:29:42,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 140. [2020-08-21 16:29:42,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-21 16:29:42,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2020-08-21 16:29:42,671 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 42 [2020-08-21 16:29:42,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:29:42,672 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2020-08-21 16:29:42,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:29:42,672 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2020-08-21 16:29:42,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-21 16:29:42,673 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:29:42,673 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-08-21 16:29:42,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:29:42,674 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:29:42,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:29:42,674 INFO L82 PathProgramCache]: Analyzing trace with hash 481333020, now seen corresponding path program 2 times [2020-08-21 16:29:42,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:29:42,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180510690] [2020-08-21 16:29:42,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:29:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:42,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:29:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:42,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:29:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:42,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 16:29:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:42,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 16:29:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:29:42,949 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-21 16:29:42,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180510690] [2020-08-21 16:29:42,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:29:42,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 16:29:42,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770468230] [2020-08-21 16:29:42,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 16:29:42,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:29:42,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 16:29:42,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-21 16:29:42,952 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand 13 states. [2020-08-21 16:29:43,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:29:43,287 INFO L93 Difference]: Finished difference Result 222 states and 296 transitions. [2020-08-21 16:29:43,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 16:29:43,288 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-08-21 16:29:43,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:29:43,290 INFO L225 Difference]: With dead ends: 222 [2020-08-21 16:29:43,290 INFO L226 Difference]: Without dead ends: 198 [2020-08-21 16:29:43,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-08-21 16:29:43,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-08-21 16:29:43,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 178. [2020-08-21 16:29:43,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-08-21 16:29:43,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 236 transitions. [2020-08-21 16:29:43,307 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 236 transitions. Word has length 42 [2020-08-21 16:29:43,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:29:43,307 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 236 transitions. [2020-08-21 16:29:43,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 16:29:43,308 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 236 transitions. [2020-08-21 16:29:43,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-21 16:29:43,309 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:29:43,309 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:29:43,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 16:29:43,309 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:29:43,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:29:43,310 INFO L82 PathProgramCache]: Analyzing trace with hash 2004765024, now seen corresponding path program 1 times [2020-08-21 16:29:43,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:29:43,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302223416] [2020-08-21 16:29:43,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:29:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 16:29:43,326 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 16:29:43,327 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 16:29:43,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 16:29:43,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:29:43 BoogieIcfgContainer [2020-08-21 16:29:43,351 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:29:43,353 INFO L168 Benchmark]: Toolchain (without parser) took 4640.39 ms. Allocated memory was 138.4 MB in the beginning and 249.6 MB in the end (delta: 111.1 MB). Free memory was 101.2 MB in the beginning and 134.0 MB in the end (delta: -32.8 MB). Peak memory consumption was 78.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:29:43,354 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 16:29:43,355 INFO L168 Benchmark]: CACSL2BoogieTranslator took 402.85 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 101.0 MB in the beginning and 177.3 MB in the end (delta: -76.3 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-08-21 16:29:43,356 INFO L168 Benchmark]: Boogie Preprocessor took 38.44 ms. Allocated memory is still 200.8 MB. Free memory was 177.3 MB in the beginning and 174.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-08-21 16:29:43,357 INFO L168 Benchmark]: RCFGBuilder took 486.25 ms. Allocated memory is still 200.8 MB. Free memory was 174.9 MB in the beginning and 150.9 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-08-21 16:29:43,357 INFO L168 Benchmark]: TraceAbstraction took 3708.05 ms. Allocated memory was 200.8 MB in the beginning and 249.6 MB in the end (delta: 48.8 MB). Free memory was 150.2 MB in the beginning and 134.0 MB in the end (delta: 16.2 MB). Peak memory consumption was 64.9 MB. Max. memory is 7.1 GB. [2020-08-21 16:29:43,361 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 402.85 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 101.0 MB in the beginning and 177.3 MB in the end (delta: -76.3 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 38.44 ms. Allocated memory is still 200.8 MB. Free memory was 177.3 MB in the beginning and 174.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 486.25 ms. Allocated memory is still 200.8 MB. Free memory was 174.9 MB in the beginning and 150.9 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3708.05 ms. Allocated memory was 200.8 MB in the beginning and 249.6 MB in the end (delta: 48.8 MB). Free memory was 150.2 MB in the beginning and 134.0 MB in the end (delta: 16.2 MB). Peak memory consumption was 64.9 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 100, overapproximation of bitwiseAnd at line 98. 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, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.6s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 671 SDtfs, 266 SDslu, 4761 SDs, 0 SdLazy, 700 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 173 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=178occurred 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: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 113 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 354 NumberOfCodeBlocks, 354 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 304 ConstructedInterpolants, 0 QuantifiedInterpolants, 35226 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 119/134 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...