/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -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 0.1.25-5644d1e-m [2020-08-18 17:50:53,710 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 17:50:53,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:50:53,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:50:53,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:50:53,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:50:53,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:50:53,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:50:53,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:50:53,776 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:50:53,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:50:53,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:50:53,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:50:53,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:50:53,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:50:53,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:50:53,789 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:50:53,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:50:53,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:50:53,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:50:53,804 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:50:53,805 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:50:53,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 17:50:53,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:50:53,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:50:53,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:50:53,823 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 [2020-08-18 17:50:53,857 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:50:53,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:50:53,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:50:53,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:50:53,859 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:50:53,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:50:53,859 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:50:53,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:50:53,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:50:53,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:50:53,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:50:53,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:50:53,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:50:53,860 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:50:53,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:50:53,861 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:50:53,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:50:53,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:50:53,861 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:50:53,862 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:50:53,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:50:53,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:50:53,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:50:53,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:50:53,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:50:53,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:50:53,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:50:53,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:50:53,863 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:50:53,864 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=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:50:54,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:50:54,176 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:50:54,180 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:50:54,181 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:50:54,182 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:50:54,183 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-08-18 17:50:54,247 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ce1486dfa/0b3ddc1c5ed0485f970e8f376a44243c/FLAGceb9497c7 [2020-08-18 17:50:54,710 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:50:54,711 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-08-18 17:50:54,718 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ce1486dfa/0b3ddc1c5ed0485f970e8f376a44243c/FLAGceb9497c7 [2020-08-18 17:50:55,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ce1486dfa/0b3ddc1c5ed0485f970e8f376a44243c [2020-08-18 17:50:55,096 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:50:55,098 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:50:55,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:50:55,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:50:55,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:50:55,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:50:55" (1/1) ... [2020-08-18 17:50:55,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@157daaf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:55, skipping insertion in model container [2020-08-18 17:50:55,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:50:55" (1/1) ... [2020-08-18 17:50:55,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:50:55,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:50:55,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:50:55,364 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:50:55,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:50:55,401 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:50:55,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:55 WrapperNode [2020-08-18 17:50:55,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:50:55,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:50:55,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:50:55,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:50:55,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:55" (1/1) ... [2020-08-18 17:50:55,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:55" (1/1) ... [2020-08-18 17:50:55,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:55" (1/1) ... [2020-08-18 17:50:55,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:55" (1/1) ... [2020-08-18 17:50:55,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:55" (1/1) ... [2020-08-18 17:50:55,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:55" (1/1) ... [2020-08-18 17:50:55,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:55" (1/1) ... [2020-08-18 17:50:55,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:50:55,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:50:55,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:50:55,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:50:55,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:55" (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 [2020-08-18 17:50:55,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:50:55,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:50:55,589 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 17:50:55,589 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:50:55,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:50:55,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 17:50:55,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 17:50:55,590 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:50:55,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:50:55,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:50:55,882 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:50:55,882 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 17:50:55,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:50:55 BoogieIcfgContainer [2020-08-18 17:50:55,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:50:55,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:50:55,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:50:55,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:50:55,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:50:55" (1/3) ... [2020-08-18 17:50:55,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d571ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:50:55, skipping insertion in model container [2020-08-18 17:50:55,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:55" (2/3) ... [2020-08-18 17:50:55,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d571ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:50:55, skipping insertion in model container [2020-08-18 17:50:55,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:50:55" (3/3) ... [2020-08-18 17:50:55,894 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-08-18 17:50:55,904 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:50:55,911 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:50:55,922 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:50:55,945 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:50:55,945 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:50:55,945 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:50:55,945 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:50:55,945 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:50:55,945 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:50:55,945 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:50:55,946 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:50:55,961 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-18 17:50:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 17:50:55,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:55,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:55,967 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:55,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:55,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1906239810, now seen corresponding path program 1 times [2020-08-18 17:50:55,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:55,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887801536] [2020-08-18 17:50:55,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:50:56,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887801536] [2020-08-18 17:50:56,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:50:56,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 17:50:56,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226159498] [2020-08-18 17:50:56,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 17:50:56,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:56,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 17:50:56,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 17:50:56,111 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-08-18 17:50:56,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:56,137 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2020-08-18 17:50:56,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 17:50:56,138 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-18 17:50:56,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:56,147 INFO L225 Difference]: With dead ends: 38 [2020-08-18 17:50:56,147 INFO L226 Difference]: Without dead ends: 21 [2020-08-18 17:50:56,151 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 [2020-08-18 17:50:56,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-18 17:50:56,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-18 17:50:56,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 17:50:56,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 31 transitions. [2020-08-18 17:50:56,194 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 31 transitions. Word has length 10 [2020-08-18 17:50:56,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:56,194 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 31 transitions. [2020-08-18 17:50:56,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 17:50:56,195 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 31 transitions. [2020-08-18 17:50:56,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 17:50:56,195 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:56,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:56,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:50:56,197 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:56,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:56,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1847134466, now seen corresponding path program 1 times [2020-08-18 17:50:56,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:56,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614335038] [2020-08-18 17:50:56,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:50:56,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614335038] [2020-08-18 17:50:56,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:50:56,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:50:56,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774033181] [2020-08-18 17:50:56,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:50:56,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:56,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:50:56,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:50:56,311 INFO L87 Difference]: Start difference. First operand 21 states and 31 transitions. Second operand 3 states. [2020-08-18 17:50:56,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:56,403 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2020-08-18 17:50:56,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:50:56,404 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-18 17:50:56,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:56,407 INFO L225 Difference]: With dead ends: 28 [2020-08-18 17:50:56,407 INFO L226 Difference]: Without dead ends: 23 [2020-08-18 17:50:56,408 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 [2020-08-18 17:50:56,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-18 17:50:56,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-08-18 17:50:56,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-18 17:50:56,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2020-08-18 17:50:56,416 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 10 [2020-08-18 17:50:56,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:56,416 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2020-08-18 17:50:56,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:50:56,417 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2020-08-18 17:50:56,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 17:50:56,418 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:56,418 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] [2020-08-18 17:50:56,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:50:56,419 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:56,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:56,420 INFO L82 PathProgramCache]: Analyzing trace with hash -129940435, now seen corresponding path program 1 times [2020-08-18 17:50:56,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:56,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251558550] [2020-08-18 17:50:56,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:50:56,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251558550] [2020-08-18 17:50:56,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:56,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 17:50:56,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482488505] [2020-08-18 17:50:56,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:50:56,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:56,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:50:56,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:50:56,787 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand 10 states. [2020-08-18 17:50:57,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:57,879 INFO L93 Difference]: Finished difference Result 100 states and 182 transitions. [2020-08-18 17:50:57,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:50:57,880 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-08-18 17:50:57,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:57,885 INFO L225 Difference]: With dead ends: 100 [2020-08-18 17:50:57,885 INFO L226 Difference]: Without dead ends: 95 [2020-08-18 17:50:57,886 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 [2020-08-18 17:50:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-18 17:50:57,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2020-08-18 17:50:57,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-18 17:50:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 138 transitions. [2020-08-18 17:50:57,920 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 138 transitions. Word has length 21 [2020-08-18 17:50:57,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:57,920 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 138 transitions. [2020-08-18 17:50:57,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:50:57,927 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 138 transitions. [2020-08-18 17:50:57,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 17:50:57,928 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:57,929 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] [2020-08-18 17:50:57,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:50:57,929 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:57,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:57,930 INFO L82 PathProgramCache]: Analyzing trace with hash 550117935, now seen corresponding path program 1 times [2020-08-18 17:50:57,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:57,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541876641] [2020-08-18 17:50:57,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:58,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:50:58,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541876641] [2020-08-18 17:50:58,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:50:58,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:50:58,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222481333] [2020-08-18 17:50:58,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:50:58,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:58,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:50:58,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:50:58,082 INFO L87 Difference]: Start difference. First operand 78 states and 138 transitions. Second operand 3 states. [2020-08-18 17:50:58,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:58,170 INFO L93 Difference]: Finished difference Result 110 states and 195 transitions. [2020-08-18 17:50:58,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:50:58,171 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 17:50:58,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:58,173 INFO L225 Difference]: With dead ends: 110 [2020-08-18 17:50:58,174 INFO L226 Difference]: Without dead ends: 40 [2020-08-18 17:50:58,175 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 [2020-08-18 17:50:58,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-18 17:50:58,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2020-08-18 17:50:58,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-18 17:50:58,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2020-08-18 17:50:58,182 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 21 [2020-08-18 17:50:58,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:58,189 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2020-08-18 17:50:58,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:50:58,189 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2020-08-18 17:50:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 17:50:58,190 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:58,190 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] [2020-08-18 17:50:58,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:50:58,191 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:58,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:58,191 INFO L82 PathProgramCache]: Analyzing trace with hash 263086575, now seen corresponding path program 1 times [2020-08-18 17:50:58,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:58,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94534431] [2020-08-18 17:50:58,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:58,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:50:58,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94534431] [2020-08-18 17:50:58,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:58,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 17:50:58,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781923541] [2020-08-18 17:50:58,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 17:50:58,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:58,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 17:50:58,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-18 17:50:58,391 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand 13 states. [2020-08-18 17:50:58,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:58,535 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2020-08-18 17:50:58,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 17:50:58,536 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-08-18 17:50:58,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:58,537 INFO L225 Difference]: With dead ends: 51 [2020-08-18 17:50:58,537 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 17:50:58,537 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 [2020-08-18 17:50:58,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 17:50:58,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-08-18 17:50:58,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-18 17:50:58,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-08-18 17:50:58,543 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 21 [2020-08-18 17:50:58,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:58,544 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-08-18 17:50:58,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 17:50:58,544 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-08-18 17:50:58,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 17:50:58,545 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:58,545 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] [2020-08-18 17:50:58,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:50:58,546 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:58,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:58,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1016777103, now seen corresponding path program 1 times [2020-08-18 17:50:58,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:58,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566332646] [2020-08-18 17:50:58,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:58,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:50:58,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566332646] [2020-08-18 17:50:58,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:50:58,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:50:58,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134045786] [2020-08-18 17:50:58,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:50:58,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:58,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:50:58,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:50:58,600 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 3 states. [2020-08-18 17:50:58,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:58,685 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2020-08-18 17:50:58,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:50:58,686 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 17:50:58,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:58,687 INFO L225 Difference]: With dead ends: 61 [2020-08-18 17:50:58,687 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 17:50:58,688 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 [2020-08-18 17:50:58,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 17:50:58,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-08-18 17:50:58,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-18 17:50:58,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-08-18 17:50:58,701 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 21 [2020-08-18 17:50:58,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:58,701 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-08-18 17:50:58,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:50:58,706 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-08-18 17:50:58,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 17:50:58,707 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:58,707 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] [2020-08-18 17:50:58,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:50:58,707 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:58,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:58,708 INFO L82 PathProgramCache]: Analyzing trace with hash -345519953, now seen corresponding path program 1 times [2020-08-18 17:50:58,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:58,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445233845] [2020-08-18 17:50:58,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:50:58,757 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:50:58,757 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:50:58,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:50:58,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:50:58 BoogieIcfgContainer [2020-08-18 17:50:58,782 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:50:58,786 INFO L168 Benchmark]: Toolchain (without parser) took 3687.25 ms. Allocated memory was 144.2 MB in the beginning and 239.1 MB in the end (delta: 94.9 MB). Free memory was 107.7 MB in the beginning and 147.7 MB in the end (delta: -40.0 MB). Peak memory consumption was 54.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:58,787 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 144.2 MB. Free memory was 125.7 MB in the beginning and 125.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 17:50:58,792 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.77 ms. Allocated memory is still 144.2 MB. Free memory was 107.5 MB in the beginning and 97.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:58,794 INFO L168 Benchmark]: Boogie Preprocessor took 134.20 ms. Allocated memory was 144.2 MB in the beginning and 205.5 MB in the end (delta: 61.3 MB). Free memory was 97.3 MB in the beginning and 183.5 MB in the end (delta: -86.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:58,795 INFO L168 Benchmark]: RCFGBuilder took 348.79 ms. Allocated memory is still 205.5 MB. Free memory was 183.5 MB in the beginning and 167.5 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:58,796 INFO L168 Benchmark]: TraceAbstraction took 2895.13 ms. Allocated memory was 205.5 MB in the beginning and 239.1 MB in the end (delta: 33.6 MB). Free memory was 167.5 MB in the beginning and 147.7 MB in the end (delta: 19.8 MB). Peak memory consumption was 53.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:50:58,809 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 144.2 MB. Free memory was 125.7 MB in the beginning and 125.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 303.77 ms. Allocated memory is still 144.2 MB. Free memory was 107.5 MB in the beginning and 97.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 134.20 ms. Allocated memory was 144.2 MB in the beginning and 205.5 MB in the end (delta: 61.3 MB). Free memory was 97.3 MB in the beginning and 183.5 MB in the end (delta: -86.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 348.79 ms. Allocated memory is still 205.5 MB. Free memory was 183.5 MB in the beginning and 167.5 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2895.13 ms. Allocated memory was 205.5 MB in the beginning and 239.1 MB in the end (delta: 33.6 MB). Free memory was 167.5 MB in the beginning and 147.7 MB in the end (delta: 19.8 MB). Peak memory consumption was 53.4 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, 1.1s 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, 0.2s SatisfiabilityAnalysisTime, 0.6s 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...