/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=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 0.1.25-177f698 [2020-08-21 18:06:13,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:06:13,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:06:13,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:06:13,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:06:13,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:06:13,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:06:13,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:06:13,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:06:13,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:06:13,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:06:13,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:06:13,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:06:13,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:06:13,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:06:13,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:06:13,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:06:13,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:06:13,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:06:13,468 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:06:13,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:06:13,471 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:06:13,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:06:13,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:06:13,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:06:13,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:06:13,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:06:13,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:06:13,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:06:13,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:06:13,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:06:13,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:06:13,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:06:13,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:06:13,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:06:13,498 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:06:13,499 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:06:13,499 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:06:13,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:06:13,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:06:13,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:06:13,503 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 18:06:13,543 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:06:13,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:06:13,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:06:13,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:06:13,545 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:06:13,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:06:13,545 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:06:13,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:06:13,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:06:13,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:06:13,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:06:13,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:06:13,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:06:13,546 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:06:13,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:06:13,547 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:06:13,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:06:13,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:06:13,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:06:13,548 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:06:13,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:06:13,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:06:13,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:06:13,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:06:13,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:06:13,549 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:06:13,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:06:13,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:06:13,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:06:13,550 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=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> 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 -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:06:13,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:06:13,861 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:06:13,865 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:06:13,866 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:06:13,866 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:06:13,867 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-08-21 18:06:13,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/85c258b45/a839018a671b46ea9837687c1d07d00e/FLAG3597eca3d [2020-08-21 18:06:14,357 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:06:14,358 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-08-21 18:06:14,366 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/85c258b45/a839018a671b46ea9837687c1d07d00e/FLAG3597eca3d [2020-08-21 18:06:14,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/85c258b45/a839018a671b46ea9837687c1d07d00e [2020-08-21 18:06:14,688 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:06:14,690 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:06:14,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:06:14,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:06:14,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:06:14,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:06:14" (1/1) ... [2020-08-21 18:06:14,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f214b0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:14, skipping insertion in model container [2020-08-21 18:06:14,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:06:14" (1/1) ... [2020-08-21 18:06:14,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:06:14,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:06:15,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:06:15,040 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:06:15,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:06:15,186 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:06:15,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:15 WrapperNode [2020-08-21 18:06:15,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:06:15,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:06:15,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:06:15,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:06:15,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:15" (1/1) ... [2020-08-21 18:06:15,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:15" (1/1) ... [2020-08-21 18:06:15,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:15" (1/1) ... [2020-08-21 18:06:15,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:15" (1/1) ... [2020-08-21 18:06:15,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:15" (1/1) ... [2020-08-21 18:06:15,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:15" (1/1) ... [2020-08-21 18:06:15,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:15" (1/1) ... [2020-08-21 18:06:15,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:06:15,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:06:15,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:06:15,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:06:15,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:15" (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 18:06:15,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:06:15,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:06:15,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 18:06:15,299 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-21 18:06:15,299 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-21 18:06:15,300 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-21 18:06:15,300 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:06:15,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:06:15,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 18:06:15,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 18:06:15,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 18:06:15,301 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-21 18:06:15,301 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-21 18:06:15,301 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-21 18:06:15,301 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:06:15,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:06:15,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:06:15,722 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:06:15,722 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-21 18:06:15,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:06:15 BoogieIcfgContainer [2020-08-21 18:06:15,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:06:15,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:06:15,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:06:15,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:06:15,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:06:14" (1/3) ... [2020-08-21 18:06:15,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e0b04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:06:15, skipping insertion in model container [2020-08-21 18:06:15,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:15" (2/3) ... [2020-08-21 18:06:15,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e0b04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:06:15, skipping insertion in model container [2020-08-21 18:06:15,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:06:15" (3/3) ... [2020-08-21 18:06:15,735 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2020-08-21 18:06:15,747 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:06:15,759 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:06:15,770 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:06:15,794 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:06:15,794 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:06:15,795 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:06:15,795 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:06:15,795 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:06:15,795 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:06:15,795 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:06:15,795 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:06:15,813 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-08-21 18:06:15,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 18:06:15,819 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:15,820 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 18:06:15,821 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:15,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:15,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1312098946, now seen corresponding path program 1 times [2020-08-21 18:06:15,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:15,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188356104] [2020-08-21 18:06:15,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:06:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,300 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 18:06:16,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188356104] [2020-08-21 18:06:16,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:16,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 18:06:16,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152570102] [2020-08-21 18:06:16,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 18:06:16,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:16,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 18:06:16,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:06:16,329 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 9 states. [2020-08-21 18:06:16,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:16,566 INFO L93 Difference]: Finished difference Result 146 states and 224 transitions. [2020-08-21 18:06:16,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:06:16,568 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-08-21 18:06:16,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:16,580 INFO L225 Difference]: With dead ends: 146 [2020-08-21 18:06:16,581 INFO L226 Difference]: Without dead ends: 86 [2020-08-21 18:06:16,586 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 18:06:16,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-21 18:06:16,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-08-21 18:06:16,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 18:06:16,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2020-08-21 18:06:16,646 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 34 [2020-08-21 18:06:16,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:16,647 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2020-08-21 18:06:16,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 18:06:16,647 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2020-08-21 18:06:16,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 18:06:16,650 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:16,650 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 18:06:16,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:06:16,651 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:16,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:16,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1254840644, now seen corresponding path program 1 times [2020-08-21 18:06:16,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:16,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067798518] [2020-08-21 18:06:16,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:06:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,937 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 18:06:16,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067798518] [2020-08-21 18:06:16,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:06:16,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 18:06:16,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159886474] [2020-08-21 18:06:16,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:06:16,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:16,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:06:16,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:06:16,945 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand 8 states. [2020-08-21 18:06:17,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:17,078 INFO L93 Difference]: Finished difference Result 140 states and 193 transitions. [2020-08-21 18:06:17,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 18:06:17,080 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-08-21 18:06:17,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:17,083 INFO L225 Difference]: With dead ends: 140 [2020-08-21 18:06:17,083 INFO L226 Difference]: Without dead ends: 99 [2020-08-21 18:06:17,086 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 18:06:17,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-21 18:06:17,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 84. [2020-08-21 18:06:17,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-21 18:06:17,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 114 transitions. [2020-08-21 18:06:17,119 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 114 transitions. Word has length 34 [2020-08-21 18:06:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:17,120 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 114 transitions. [2020-08-21 18:06:17,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:06:17,123 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 114 transitions. [2020-08-21 18:06:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 18:06:17,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:17,128 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 18:06:17,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:06:17,128 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:17,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:17,129 INFO L82 PathProgramCache]: Analyzing trace with hash 894544493, now seen corresponding path program 1 times [2020-08-21 18:06:17,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:17,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118700905] [2020-08-21 18:06:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:06:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,430 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 18:06:17,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118700905] [2020-08-21 18:06:17,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:17,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 18:06:17,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143046210] [2020-08-21 18:06:17,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 18:06:17,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:17,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 18:06:17,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 18:06:17,433 INFO L87 Difference]: Start difference. First operand 84 states and 114 transitions. Second operand 12 states. [2020-08-21 18:06:17,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:17,642 INFO L93 Difference]: Finished difference Result 152 states and 209 transitions. [2020-08-21 18:06:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 18:06:17,643 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-08-21 18:06:17,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:17,645 INFO L225 Difference]: With dead ends: 152 [2020-08-21 18:06:17,646 INFO L226 Difference]: Without dead ends: 111 [2020-08-21 18:06:17,647 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 18:06:17,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-21 18:06:17,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 95. [2020-08-21 18:06:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-21 18:06:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 128 transitions. [2020-08-21 18:06:17,662 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 128 transitions. Word has length 38 [2020-08-21 18:06:17,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:17,662 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 128 transitions. [2020-08-21 18:06:17,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 18:06:17,663 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 128 transitions. [2020-08-21 18:06:17,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 18:06:17,664 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:17,665 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 18:06:17,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:06:17,665 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:17,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:17,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1876990799, now seen corresponding path program 1 times [2020-08-21 18:06:17,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:17,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3848599] [2020-08-21 18:06:17,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:06:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,825 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 18:06:17,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3848599] [2020-08-21 18:06:17,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:17,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 18:06:17,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493090838] [2020-08-21 18:06:17,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 18:06:17,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:17,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 18:06:17,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:06:17,828 INFO L87 Difference]: Start difference. First operand 95 states and 128 transitions. Second operand 9 states. [2020-08-21 18:06:17,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:17,972 INFO L93 Difference]: Finished difference Result 147 states and 194 transitions. [2020-08-21 18:06:17,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 18:06:17,973 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-08-21 18:06:17,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:17,975 INFO L225 Difference]: With dead ends: 147 [2020-08-21 18:06:17,975 INFO L226 Difference]: Without dead ends: 107 [2020-08-21 18:06:17,976 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 18:06:17,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-08-21 18:06:17,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-08-21 18:06:17,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-21 18:06:17,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 111 transitions. [2020-08-21 18:06:17,989 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 111 transitions. Word has length 38 [2020-08-21 18:06:17,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:17,989 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 111 transitions. [2020-08-21 18:06:17,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 18:06:17,990 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 111 transitions. [2020-08-21 18:06:17,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-21 18:06:17,991 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:17,992 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 18:06:17,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:06:17,992 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:17,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:17,993 INFO L82 PathProgramCache]: Analyzing trace with hash 2083243036, now seen corresponding path program 1 times [2020-08-21 18:06:17,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:17,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184657192] [2020-08-21 18:06:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:06:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 18:06:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,167 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 18:06:18,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184657192] [2020-08-21 18:06:18,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:06:18,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 18:06:18,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826477163] [2020-08-21 18:06:18,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 18:06:18,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:18,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 18:06:18,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:06:18,170 INFO L87 Difference]: Start difference. First operand 85 states and 111 transitions. Second operand 9 states. [2020-08-21 18:06:18,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:18,311 INFO L93 Difference]: Finished difference Result 134 states and 178 transitions. [2020-08-21 18:06:18,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:06:18,312 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-08-21 18:06:18,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:18,314 INFO L225 Difference]: With dead ends: 134 [2020-08-21 18:06:18,314 INFO L226 Difference]: Without dead ends: 111 [2020-08-21 18:06:18,315 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 18:06:18,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-21 18:06:18,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2020-08-21 18:06:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-21 18:06:18,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2020-08-21 18:06:18,327 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 42 [2020-08-21 18:06:18,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:18,327 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2020-08-21 18:06:18,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 18:06:18,328 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2020-08-21 18:06:18,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-21 18:06:18,329 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:18,330 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 18:06:18,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:06:18,330 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:18,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:18,331 INFO L82 PathProgramCache]: Analyzing trace with hash 2140501338, now seen corresponding path program 1 times [2020-08-21 18:06:18,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:18,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639911351] [2020-08-21 18:06:18,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:06:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 18:06:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,478 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 18:06:18,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639911351] [2020-08-21 18:06:18,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:18,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 18:06:18,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128427063] [2020-08-21 18:06:18,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:06:18,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:18,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:06:18,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:06:18,481 INFO L87 Difference]: Start difference. First operand 103 states and 137 transitions. Second operand 8 states. [2020-08-21 18:06:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:18,573 INFO L93 Difference]: Finished difference Result 163 states and 218 transitions. [2020-08-21 18:06:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 18:06:18,574 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-08-21 18:06:18,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:18,575 INFO L225 Difference]: With dead ends: 163 [2020-08-21 18:06:18,576 INFO L226 Difference]: Without dead ends: 126 [2020-08-21 18:06:18,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 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 18:06:18,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-21 18:06:18,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 113. [2020-08-21 18:06:18,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-21 18:06:18,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 148 transitions. [2020-08-21 18:06:18,600 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 148 transitions. Word has length 42 [2020-08-21 18:06:18,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:18,600 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 148 transitions. [2020-08-21 18:06:18,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:06:18,601 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 148 transitions. [2020-08-21 18:06:18,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-21 18:06:18,605 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:18,605 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 18:06:18,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:06:18,605 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:18,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:18,606 INFO L82 PathProgramCache]: Analyzing trace with hash 424074718, now seen corresponding path program 1 times [2020-08-21 18:06:18,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:18,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643042511] [2020-08-21 18:06:18,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 18:06:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,770 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 18:06:18,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643042511] [2020-08-21 18:06:18,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:18,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 18:06:18,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946075873] [2020-08-21 18:06:18,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:06:18,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:18,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:06:18,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:06:18,773 INFO L87 Difference]: Start difference. First operand 113 states and 148 transitions. Second operand 8 states. [2020-08-21 18:06:18,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:18,872 INFO L93 Difference]: Finished difference Result 177 states and 237 transitions. [2020-08-21 18:06:18,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 18:06:18,872 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-08-21 18:06:18,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:18,874 INFO L225 Difference]: With dead ends: 177 [2020-08-21 18:06:18,874 INFO L226 Difference]: Without dead ends: 149 [2020-08-21 18:06:18,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 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 18:06:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-21 18:06:18,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 140. [2020-08-21 18:06:18,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-21 18:06:18,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2020-08-21 18:06:18,887 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 42 [2020-08-21 18:06:18,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:18,887 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2020-08-21 18:06:18,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:06:18,888 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2020-08-21 18:06:18,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-21 18:06:18,889 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:18,889 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 18:06:18,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:06:18,889 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:18,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:18,890 INFO L82 PathProgramCache]: Analyzing trace with hash 481333020, now seen corresponding path program 2 times [2020-08-21 18:06:18,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:18,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785526588] [2020-08-21 18:06:18,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 18:06:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,180 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 18:06:19,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785526588] [2020-08-21 18:06:19,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:06:19,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-21 18:06:19,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420330309] [2020-08-21 18:06:19,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 18:06:19,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:19,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 18:06:19,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-21 18:06:19,183 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand 13 states. [2020-08-21 18:06:19,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:19,525 INFO L93 Difference]: Finished difference Result 222 states and 296 transitions. [2020-08-21 18:06:19,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 18:06:19,526 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-08-21 18:06:19,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:19,528 INFO L225 Difference]: With dead ends: 222 [2020-08-21 18:06:19,528 INFO L226 Difference]: Without dead ends: 198 [2020-08-21 18:06:19,529 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 18:06:19,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-08-21 18:06:19,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 178. [2020-08-21 18:06:19,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-08-21 18:06:19,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 236 transitions. [2020-08-21 18:06:19,544 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 236 transitions. Word has length 42 [2020-08-21 18:06:19,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:19,545 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 236 transitions. [2020-08-21 18:06:19,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 18:06:19,545 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 236 transitions. [2020-08-21 18:06:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-21 18:06:19,546 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:19,546 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 18:06:19,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:06:19,547 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:19,547 INFO L82 PathProgramCache]: Analyzing trace with hash 2004765024, now seen corresponding path program 1 times [2020-08-21 18:06:19,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:19,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406525345] [2020-08-21 18:06:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 18:06:19,564 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 18:06:19,564 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 18:06:19,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 18:06:19,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:06:19 BoogieIcfgContainer [2020-08-21 18:06:19,599 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:06:19,602 INFO L168 Benchmark]: Toolchain (without parser) took 4911.43 ms. Allocated memory was 148.9 MB in the beginning and 267.9 MB in the end (delta: 119.0 MB). Free memory was 104.6 MB in the beginning and 239.2 MB in the end (delta: -134.6 MB). Peak memory consumption was 97.7 MB. Max. memory is 7.1 GB. [2020-08-21 18:06:19,603 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 18:06:19,603 INFO L168 Benchmark]: CACSL2BoogieTranslator took 492.84 ms. Allocated memory was 148.9 MB in the beginning and 205.5 MB in the end (delta: 56.6 MB). Free memory was 104.2 MB in the beginning and 184.2 MB in the end (delta: -80.0 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. [2020-08-21 18:06:19,604 INFO L168 Benchmark]: Boogie Preprocessor took 43.46 ms. Allocated memory is still 205.5 MB. Free memory was 184.2 MB in the beginning and 181.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-21 18:06:19,605 INFO L168 Benchmark]: RCFGBuilder took 495.54 ms. Allocated memory is still 205.5 MB. Free memory was 181.8 MB in the beginning and 156.9 MB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. [2020-08-21 18:06:19,606 INFO L168 Benchmark]: TraceAbstraction took 3871.48 ms. Allocated memory was 205.5 MB in the beginning and 267.9 MB in the end (delta: 62.4 MB). Free memory was 156.9 MB in the beginning and 239.2 MB in the end (delta: -82.3 MB). Peak memory consumption was 93.4 MB. Max. memory is 7.1 GB. [2020-08-21 18:06:19,609 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 492.84 ms. Allocated memory was 148.9 MB in the beginning and 205.5 MB in the end (delta: 56.6 MB). Free memory was 104.2 MB in the beginning and 184.2 MB in the end (delta: -80.0 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.46 ms. Allocated memory is still 205.5 MB. Free memory was 184.2 MB in the beginning and 181.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 495.54 ms. Allocated memory is still 205.5 MB. Free memory was 181.8 MB in the beginning and 156.9 MB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3871.48 ms. Allocated memory was 205.5 MB in the beginning and 267.9 MB in the end (delta: 62.4 MB). Free memory was 156.9 MB in the beginning and 239.2 MB in the end (delta: -82.3 MB). Peak memory consumption was 93.4 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: 3.7s, 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, 0.3s SatisfiabilityAnalysisTime, 1.5s 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...