/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=NARROWEST --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-loops/diamond_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:19:52,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:19:52,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:19:52,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:19:52,291 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:19:52,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:19:52,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:19:52,305 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:19:52,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:19:52,311 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:19:52,312 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:19:52,313 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:19:52,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:19:52,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:19:52,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:19:52,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:19:52,322 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:19:52,323 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:19:52,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:19:52,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:19:52,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:19:52,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:19:52,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:19:52,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:19:52,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 21:19:52,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:19:52,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:19:52,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:19:52,374 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 21:19:52,396 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:19:52,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:19:52,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:19:52,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:19:52,398 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:19:52,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:19:52,398 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:19:52,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:19:52,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:19:52,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:19:52,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:19:52,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:19:52,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:19:52,400 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:19:52,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:19:52,400 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:19:52,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:19:52,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:19:52,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:19:52,401 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:19:52,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:19:52,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:19:52,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:19:52,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:19:52,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:19:52,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:19:52,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:19:52,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:19:52,403 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:19:52,403 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=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:19:52,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:19:52,718 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:19:52,722 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:19:52,724 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:19:52,724 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:19:52,725 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-08-21 21:19:52,792 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/afd446f68/b1cce95de6e54beb981bbf54a9df5aac/FLAG6f8524891 [2020-08-21 21:19:53,291 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:19:53,292 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-08-21 21:19:53,299 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/afd446f68/b1cce95de6e54beb981bbf54a9df5aac/FLAG6f8524891 [2020-08-21 21:19:53,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/afd446f68/b1cce95de6e54beb981bbf54a9df5aac [2020-08-21 21:19:53,670 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:19:53,672 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:19:53,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:19:53,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:19:53,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:19:53,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:19:53" (1/1) ... [2020-08-21 21:19:53,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39315203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:53, skipping insertion in model container [2020-08-21 21:19:53,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:19:53" (1/1) ... [2020-08-21 21:19:53,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:19:53,708 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:19:53,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:19:53,888 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:19:53,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:19:53,925 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:19:53,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:53 WrapperNode [2020-08-21 21:19:53,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:19:53,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:19:53,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:19:53,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:19:53,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:53" (1/1) ... [2020-08-21 21:19:53,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:53" (1/1) ... [2020-08-21 21:19:54,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:53" (1/1) ... [2020-08-21 21:19:54,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:53" (1/1) ... [2020-08-21 21:19:54,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:53" (1/1) ... [2020-08-21 21:19:54,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:53" (1/1) ... [2020-08-21 21:19:54,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:53" (1/1) ... [2020-08-21 21:19:54,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:19:54,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:19:54,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:19:54,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:19:54,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:19:54,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:19:54,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:19:54,126 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 21:19:54,127 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:19:54,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:19:54,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 21:19:54,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 21:19:54,128 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:19:54,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:19:54,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:19:54,422 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:19:54,422 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 21:19:54,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:19:54 BoogieIcfgContainer [2020-08-21 21:19:54,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:19:54,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:19:54,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:19:54,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:19:54,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:19:53" (1/3) ... [2020-08-21 21:19:54,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e73079f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:19:54, skipping insertion in model container [2020-08-21 21:19:54,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:19:53" (2/3) ... [2020-08-21 21:19:54,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e73079f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:19:54, skipping insertion in model container [2020-08-21 21:19:54,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:19:54" (3/3) ... [2020-08-21 21:19:54,435 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-08-21 21:19:54,447 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:19:54,455 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:19:54,472 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:19:54,540 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:19:54,540 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:19:54,540 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:19:54,541 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:19:54,541 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:19:54,541 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:19:54,541 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:19:54,541 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:19:54,565 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-21 21:19:54,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 21:19:54,572 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:19:54,573 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:19:54,573 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:19:54,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:19:54,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1906239810, now seen corresponding path program 1 times [2020-08-21 21:19:54,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:19:54,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452210818] [2020-08-21 21:19:54,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:19:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:19:54,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:19:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:19:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:19:54,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452210818] [2020-08-21 21:19:54,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:19:54,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 21:19:54,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167886077] [2020-08-21 21:19:54,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 21:19:54,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:19:54,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 21:19:54,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 21:19:54,744 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-08-21 21:19:54,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:19:54,768 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2020-08-21 21:19:54,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 21:19:54,770 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-21 21:19:54,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:19:54,778 INFO L225 Difference]: With dead ends: 38 [2020-08-21 21:19:54,779 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 21:19:54,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 21:19:54,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 21:19:54,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 21:19:54,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 21:19:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 31 transitions. [2020-08-21 21:19:54,822 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 31 transitions. Word has length 10 [2020-08-21 21:19:54,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:19:54,823 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 31 transitions. [2020-08-21 21:19:54,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 21:19:54,823 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 31 transitions. [2020-08-21 21:19:54,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 21:19:54,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:19:54,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:19:54,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:19:54,825 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:19:54,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:19:54,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1847134466, now seen corresponding path program 1 times [2020-08-21 21:19:54,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:19:54,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94174103] [2020-08-21 21:19:54,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:19:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:19:54,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:19:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:19:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:19:54,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94174103] [2020-08-21 21:19:54,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:19:54,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:19:54,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791783340] [2020-08-21 21:19:54,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:19:54,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:19:54,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:19:54,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:19:54,935 INFO L87 Difference]: Start difference. First operand 21 states and 31 transitions. Second operand 3 states. [2020-08-21 21:19:55,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:19:55,004 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2020-08-21 21:19:55,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:19:55,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-21 21:19:55,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:19:55,008 INFO L225 Difference]: With dead ends: 28 [2020-08-21 21:19:55,008 INFO L226 Difference]: Without dead ends: 23 [2020-08-21 21:19:55,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:19:55,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-21 21:19:55,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-08-21 21:19:55,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-21 21:19:55,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2020-08-21 21:19:55,017 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 10 [2020-08-21 21:19:55,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:19:55,017 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2020-08-21 21:19:55,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:19:55,017 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2020-08-21 21:19:55,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 21:19:55,018 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:19:55,019 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:19:55,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:19:55,019 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:19:55,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:19:55,020 INFO L82 PathProgramCache]: Analyzing trace with hash -129940435, now seen corresponding path program 1 times [2020-08-21 21:19:55,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:19:55,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304834764] [2020-08-21 21:19:55,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:19:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:19:55,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:19:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:19:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:19:55,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304834764] [2020-08-21 21:19:55,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:19:55,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 21:19:55,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535292559] [2020-08-21 21:19:55,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 21:19:55,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:19:55,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 21:19:55,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:19:55,354 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand 10 states. [2020-08-21 21:19:56,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:19:56,362 INFO L93 Difference]: Finished difference Result 100 states and 182 transitions. [2020-08-21 21:19:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 21:19:56,363 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-08-21 21:19:56,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:19:56,365 INFO L225 Difference]: With dead ends: 100 [2020-08-21 21:19:56,365 INFO L226 Difference]: Without dead ends: 95 [2020-08-21 21:19:56,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:19:56,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-21 21:19:56,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2020-08-21 21:19:56,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 21:19:56,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 138 transitions. [2020-08-21 21:19:56,381 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 138 transitions. Word has length 21 [2020-08-21 21:19:56,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:19:56,382 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 138 transitions. [2020-08-21 21:19:56,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 21:19:56,382 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 138 transitions. [2020-08-21 21:19:56,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 21:19:56,383 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:19:56,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:19:56,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:19:56,384 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:19:56,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:19:56,385 INFO L82 PathProgramCache]: Analyzing trace with hash 550117935, now seen corresponding path program 1 times [2020-08-21 21:19:56,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:19:56,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102847042] [2020-08-21 21:19:56,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:19:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:19:56,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:19:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:19:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:19:56,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102847042] [2020-08-21 21:19:56,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:19:56,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:19:56,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143447020] [2020-08-21 21:19:56,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:19:56,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:19:56,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:19:56,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:19:56,518 INFO L87 Difference]: Start difference. First operand 78 states and 138 transitions. Second operand 3 states. [2020-08-21 21:19:56,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:19:56,635 INFO L93 Difference]: Finished difference Result 110 states and 195 transitions. [2020-08-21 21:19:56,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:19:56,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 21:19:56,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:19:56,642 INFO L225 Difference]: With dead ends: 110 [2020-08-21 21:19:56,642 INFO L226 Difference]: Without dead ends: 40 [2020-08-21 21:19:56,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:19:56,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-21 21:19:56,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2020-08-21 21:19:56,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 21:19:56,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2020-08-21 21:19:56,661 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 21 [2020-08-21 21:19:56,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:19:56,662 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2020-08-21 21:19:56,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:19:56,663 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2020-08-21 21:19:56,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 21:19:56,664 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:19:56,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:19:56,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:19:56,666 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:19:56,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:19:56,667 INFO L82 PathProgramCache]: Analyzing trace with hash 263086575, now seen corresponding path program 1 times [2020-08-21 21:19:56,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:19:56,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351471453] [2020-08-21 21:19:56,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:19:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:19:56,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:19:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:19:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:19:56,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351471453] [2020-08-21 21:19:56,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:19:56,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 21:19:56,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448569366] [2020-08-21 21:19:56,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 21:19:56,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:19:56,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 21:19:56,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:19:56,964 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand 13 states. [2020-08-21 21:19:57,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:19:57,151 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2020-08-21 21:19:57,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 21:19:57,152 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-08-21 21:19:57,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:19:57,153 INFO L225 Difference]: With dead ends: 51 [2020-08-21 21:19:57,153 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 21:19:57,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:19:57,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 21:19:57,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-08-21 21:19:57,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-21 21:19:57,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-08-21 21:19:57,161 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 21 [2020-08-21 21:19:57,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:19:57,161 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-08-21 21:19:57,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 21:19:57,162 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-08-21 21:19:57,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 21:19:57,163 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:19:57,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:19:57,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:19:57,163 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:19:57,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:19:57,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1016777103, now seen corresponding path program 1 times [2020-08-21 21:19:57,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:19:57,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050358438] [2020-08-21 21:19:57,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:19:57,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:19:57,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:19:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:19:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:19:57,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050358438] [2020-08-21 21:19:57,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:19:57,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 21:19:57,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631599347] [2020-08-21 21:19:57,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 21:19:57,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:19:57,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 21:19:57,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:19:57,231 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 3 states. [2020-08-21 21:19:57,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:19:57,295 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2020-08-21 21:19:57,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 21:19:57,296 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 21:19:57,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:19:57,297 INFO L225 Difference]: With dead ends: 61 [2020-08-21 21:19:57,298 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 21:19:57,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 21:19:57,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 21:19:57,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-08-21 21:19:57,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-21 21:19:57,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-08-21 21:19:57,305 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 21 [2020-08-21 21:19:57,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:19:57,305 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-08-21 21:19:57,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 21:19:57,305 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-08-21 21:19:57,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 21:19:57,306 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:19:57,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:19:57,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:19:57,307 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:19:57,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:19:57,307 INFO L82 PathProgramCache]: Analyzing trace with hash -345519953, now seen corresponding path program 1 times [2020-08-21 21:19:57,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:19:57,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110130006] [2020-08-21 21:19:57,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:19:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 21:19:57,334 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 21:19:57,335 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 21:19:57,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:19:57,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:19:57 BoogieIcfgContainer [2020-08-21 21:19:57,357 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:19:57,360 INFO L168 Benchmark]: Toolchain (without parser) took 3687.49 ms. Allocated memory was 141.0 MB in the beginning and 242.7 MB in the end (delta: 101.7 MB). Free memory was 103.9 MB in the beginning and 166.7 MB in the end (delta: -62.8 MB). Peak memory consumption was 39.0 MB. Max. memory is 7.1 GB. [2020-08-21 21:19:57,361 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 21:19:57,362 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.07 ms. Allocated memory is still 141.0 MB. Free memory was 103.7 MB in the beginning and 93.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-21 21:19:57,363 INFO L168 Benchmark]: Boogie Preprocessor took 114.01 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.5 MB in the beginning and 182.0 MB in the end (delta: -88.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 21:19:57,364 INFO L168 Benchmark]: RCFGBuilder took 385.56 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 165.6 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-08-21 21:19:57,365 INFO L168 Benchmark]: TraceAbstraction took 2929.72 ms. Allocated memory was 203.9 MB in the beginning and 242.7 MB in the end (delta: 38.8 MB). Free memory was 165.6 MB in the beginning and 166.7 MB in the end (delta: -1.1 MB). Peak memory consumption was 37.7 MB. Max. memory is 7.1 GB. [2020-08-21 21:19:57,369 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.07 ms. Allocated memory is still 141.0 MB. Free memory was 103.7 MB in the beginning and 93.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.01 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 93.5 MB in the beginning and 182.0 MB in the end (delta: -88.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 385.56 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 165.6 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2929.72 ms. Allocated memory was 203.9 MB in the beginning and 242.7 MB in the end (delta: 38.8 MB). Free memory was 165.6 MB in the beginning and 166.7 MB in the end (delta: -1.1 MB). Peak memory consumption was 37.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int x = 0; [L13] unsigned int y = __VERIFIER_nondet_uint(); [L15] COND TRUE x < 99 [L16] COND FALSE !(y % 2 == 0) [L17] x += 2 [L19] COND FALSE !(y % 2 == 0) [L20] x -= 2 [L22] COND FALSE !(y % 2 == 0) [L23] x += 2 [L25] COND FALSE !(y % 2 == 0) [L26] x -= 2 [L28] COND FALSE !(y % 2 == 0) [L29] x += 2 [L31] COND FALSE !(y % 2 == 0) [L32] x -= 4 [L34] COND FALSE !(y % 2 == 0) [L35] x += 4 [L37] COND FALSE !(y % 2 == 0) [L38] x += 2 [L40] COND FALSE !(y % 2 == 0) [L41] x -= 4 [L43] COND FALSE !(y % 2 == 0) [L44] x -= 4 [L15] COND FALSE !(x < 99) [L47] CALL __VERIFIER_assert((x % 2) == (y % 2)) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.8s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 139 SDtfs, 31 SDslu, 60 SDs, 0 SdLazy, 1106 SolverSat, 209 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 28 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 125 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 7076 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 2/4 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 proved your program to be incorrect! Received shutdown request...