/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 false -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-eb0fd7c [2020-09-21 10:17:22,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:17:22,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:17:22,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:17:22,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:17:22,495 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:17:22,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:17:22,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:17:22,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:17:22,504 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:17:22,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:17:22,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:17:22,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:17:22,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:17:22,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:17:22,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:17:22,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:17:22,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:17:22,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:17:22,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:17:22,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:17:22,521 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:17:22,523 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:17:22,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:17:22,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:17:22,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:17:22,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:17:22,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:17:22,540 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 10:17:22,571 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:17:22,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:17:22,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:17:22,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:17:22,573 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:17:22,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:17:22,574 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:17:22,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:17:22,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:17:22,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:17:22,577 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:17:22,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:17:22,578 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:17:22,578 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:17:22,578 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:17:22,579 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:17:22,580 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:17:22,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:17:22,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:17:22,580 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:17:22,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:17:22,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:17:22,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:17:22,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:17:22,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:17:22,582 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:17:22,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:17:22,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:17:22,583 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:17:22,583 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 -> false [2020-09-21 10:17:23,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:17:23,133 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:17:23,139 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:17:23,141 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:17:23,142 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:17:23,143 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-09-21 10:17:23,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a87385fbe/5190c16a34c1457f85e92912c591799d/FLAGe9657d548 [2020-09-21 10:17:23,763 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:17:23,764 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-09-21 10:17:23,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a87385fbe/5190c16a34c1457f85e92912c591799d/FLAGe9657d548 [2020-09-21 10:17:24,101 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a87385fbe/5190c16a34c1457f85e92912c591799d [2020-09-21 10:17:24,114 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:17:24,121 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:17:24,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:17:24,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:17:24,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:17:24,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:17:24" (1/1) ... [2020-09-21 10:17:24,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e164ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:24, skipping insertion in model container [2020-09-21 10:17:24,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:17:24" (1/1) ... [2020-09-21 10:17:24,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:17:24,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:17:24,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:17:24,374 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:17:24,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:17:24,411 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:17:24,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:24 WrapperNode [2020-09-21 10:17:24,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:17:24,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:17:24,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:17:24,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:17:24,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:24" (1/1) ... [2020-09-21 10:17:24,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:24" (1/1) ... [2020-09-21 10:17:24,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:24" (1/1) ... [2020-09-21 10:17:24,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:24" (1/1) ... [2020-09-21 10:17:24,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:24" (1/1) ... [2020-09-21 10:17:24,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:24" (1/1) ... [2020-09-21 10:17:24,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:24" (1/1) ... [2020-09-21 10:17:24,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:17:24,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:17:24,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:17:24,531 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:17:24,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:17:24,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:17:24,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:17:24,608 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 10:17:24,608 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:17:24,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:17:24,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-21 10:17:24,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 10:17:24,609 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:17:24,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:17:24,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:17:24,920 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:17:24,920 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 10:17:24,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:17:24 BoogieIcfgContainer [2020-09-21 10:17:24,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:17:24,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:17:24,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:17:24,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:17:24,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:17:24" (1/3) ... [2020-09-21 10:17:24,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a0bcbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:17:24, skipping insertion in model container [2020-09-21 10:17:24,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:24" (2/3) ... [2020-09-21 10:17:24,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61a0bcbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:17:24, skipping insertion in model container [2020-09-21 10:17:24,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:17:24" (3/3) ... [2020-09-21 10:17:24,935 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-09-21 10:17:24,947 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:17:24,958 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:17:24,980 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:17:25,011 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:17:25,011 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:17:25,011 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:17:25,012 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:17:25,012 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:17:25,012 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:17:25,012 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:17:25,012 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:17:25,032 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-21 10:17:25,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 10:17:25,039 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:25,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:25,041 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:25,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1906239810, now seen corresponding path program 1 times [2020-09-21 10:17:25,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:25,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567822068] [2020-09-21 10:17:25,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:25,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:17:25,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567822068] [2020-09-21 10:17:25,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:17:25,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-21 10:17:25,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953155134] [2020-09-21 10:17:25,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-21 10:17:25,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:25,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-21 10:17:25,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 10:17:25,216 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-09-21 10:17:25,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:25,246 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2020-09-21 10:17:25,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-21 10:17:25,248 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-09-21 10:17:25,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:25,259 INFO L225 Difference]: With dead ends: 38 [2020-09-21 10:17:25,260 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 10:17:25,264 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 [2020-09-21 10:17:25,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 10:17:25,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-21 10:17:25,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 10:17:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 31 transitions. [2020-09-21 10:17:25,314 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 31 transitions. Word has length 10 [2020-09-21 10:17:25,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:25,315 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 31 transitions. [2020-09-21 10:17:25,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-21 10:17:25,315 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 31 transitions. [2020-09-21 10:17:25,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-21 10:17:25,316 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:25,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:17:25,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:17:25,317 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:25,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:25,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1847134466, now seen corresponding path program 1 times [2020-09-21 10:17:25,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:25,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217428131] [2020-09-21 10:17:25,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:25,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:17:25,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217428131] [2020-09-21 10:17:25,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:17:25,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:17:25,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293428812] [2020-09-21 10:17:25,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:17:25,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:25,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:17:25,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:17:25,435 INFO L87 Difference]: Start difference. First operand 21 states and 31 transitions. Second operand 3 states. [2020-09-21 10:17:25,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:25,642 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2020-09-21 10:17:25,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:17:25,644 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-09-21 10:17:25,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:25,647 INFO L225 Difference]: With dead ends: 28 [2020-09-21 10:17:25,648 INFO L226 Difference]: Without dead ends: 23 [2020-09-21 10:17:25,649 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 [2020-09-21 10:17:25,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-21 10:17:25,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-09-21 10:17:25,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-21 10:17:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2020-09-21 10:17:25,669 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 10 [2020-09-21 10:17:25,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:25,670 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2020-09-21 10:17:25,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:17:25,670 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2020-09-21 10:17:25,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:17:25,671 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:25,671 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] [2020-09-21 10:17:25,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:17:25,673 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:25,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:25,674 INFO L82 PathProgramCache]: Analyzing trace with hash -129940435, now seen corresponding path program 1 times [2020-09-21 10:17:25,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:25,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126169658] [2020-09-21 10:17:25,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:25,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:17:25,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126169658] [2020-09-21 10:17:25,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:25,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:17:25,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90709338] [2020-09-21 10:17:25,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:17:25,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:25,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:17:25,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:17:25,980 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand 10 states. [2020-09-21 10:17:27,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:27,071 INFO L93 Difference]: Finished difference Result 100 states and 182 transitions. [2020-09-21 10:17:27,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:17:27,072 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-09-21 10:17:27,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:27,074 INFO L225 Difference]: With dead ends: 100 [2020-09-21 10:17:27,074 INFO L226 Difference]: Without dead ends: 95 [2020-09-21 10:17:27,075 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 [2020-09-21 10:17:27,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-21 10:17:27,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2020-09-21 10:17:27,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-21 10:17:27,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 138 transitions. [2020-09-21 10:17:27,095 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 138 transitions. Word has length 21 [2020-09-21 10:17:27,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:27,097 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 138 transitions. [2020-09-21 10:17:27,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:17:27,098 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 138 transitions. [2020-09-21 10:17:27,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:17:27,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:27,100 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] [2020-09-21 10:17:27,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:17:27,101 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:27,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:27,102 INFO L82 PathProgramCache]: Analyzing trace with hash 550117935, now seen corresponding path program 1 times [2020-09-21 10:17:27,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:27,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989664836] [2020-09-21 10:17:27,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:27,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:17:27,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989664836] [2020-09-21 10:17:27,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:17:27,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:17:27,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559997220] [2020-09-21 10:17:27,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:17:27,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:27,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:17:27,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:17:27,270 INFO L87 Difference]: Start difference. First operand 78 states and 138 transitions. Second operand 3 states. [2020-09-21 10:17:27,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:27,413 INFO L93 Difference]: Finished difference Result 110 states and 195 transitions. [2020-09-21 10:17:27,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:17:27,416 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 10:17:27,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:27,421 INFO L225 Difference]: With dead ends: 110 [2020-09-21 10:17:27,421 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 10:17:27,423 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 [2020-09-21 10:17:27,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 10:17:27,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2020-09-21 10:17:27,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 10:17:27,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2020-09-21 10:17:27,438 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 21 [2020-09-21 10:17:27,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:27,439 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2020-09-21 10:17:27,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:17:27,440 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2020-09-21 10:17:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:17:27,441 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:27,441 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] [2020-09-21 10:17:27,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:17:27,442 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:27,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:27,443 INFO L82 PathProgramCache]: Analyzing trace with hash 263086575, now seen corresponding path program 1 times [2020-09-21 10:17:27,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:27,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74326488] [2020-09-21 10:17:27,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:27,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:17:27,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74326488] [2020-09-21 10:17:27,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:27,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 10:17:27,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165974978] [2020-09-21 10:17:27,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 10:17:27,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:27,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 10:17:27,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:17:27,749 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand 13 states. [2020-09-21 10:17:27,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:27,920 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2020-09-21 10:17:27,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 10:17:27,921 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-09-21 10:17:27,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:27,922 INFO L225 Difference]: With dead ends: 51 [2020-09-21 10:17:27,922 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 10:17:27,923 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 [2020-09-21 10:17:27,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 10:17:27,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-09-21 10:17:27,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 10:17:27,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-09-21 10:17:27,930 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 21 [2020-09-21 10:17:27,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:27,930 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-09-21 10:17:27,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 10:17:27,930 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-09-21 10:17:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:17:27,931 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:27,932 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] [2020-09-21 10:17:27,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:17:27,932 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:27,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:27,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1016777103, now seen corresponding path program 1 times [2020-09-21 10:17:27,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:27,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551282738] [2020-09-21 10:17:27,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:27,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:17:27,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551282738] [2020-09-21 10:17:27,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:17:27,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:17:27,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460318845] [2020-09-21 10:17:27,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:17:27,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:27,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:17:27,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:17:28,000 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 3 states. [2020-09-21 10:17:28,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:28,071 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2020-09-21 10:17:28,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:17:28,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 10:17:28,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:28,073 INFO L225 Difference]: With dead ends: 61 [2020-09-21 10:17:28,073 INFO L226 Difference]: Without dead ends: 45 [2020-09-21 10:17:28,074 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 [2020-09-21 10:17:28,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-21 10:17:28,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-09-21 10:17:28,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-21 10:17:28,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-09-21 10:17:28,080 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 21 [2020-09-21 10:17:28,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:28,081 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-09-21 10:17:28,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:17:28,081 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-09-21 10:17:28,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:17:28,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:28,082 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] [2020-09-21 10:17:28,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:17:28,083 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:28,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:28,083 INFO L82 PathProgramCache]: Analyzing trace with hash -345519953, now seen corresponding path program 1 times [2020-09-21 10:17:28,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:28,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309365708] [2020-09-21 10:17:28,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:17:28,115 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:17:28,115 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:17:28,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:17:28,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:17:28 BoogieIcfgContainer [2020-09-21 10:17:28,140 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:17:28,144 INFO L168 Benchmark]: Toolchain (without parser) took 4026.49 ms. Allocated memory was 140.0 MB in the beginning and 246.4 MB in the end (delta: 106.4 MB). Free memory was 103.6 MB in the beginning and 180.0 MB in the end (delta: -76.4 MB). Peak memory consumption was 30.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:17:28,145 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 10:17:28,146 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.94 ms. Allocated memory is still 140.0 MB. Free memory was 103.0 MB in the beginning and 92.4 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-09-21 10:17:28,147 INFO L168 Benchmark]: Boogie Preprocessor took 117.40 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 92.4 MB in the beginning and 181.6 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:17:28,148 INFO L168 Benchmark]: RCFGBuilder took 394.89 ms. Allocated memory is still 202.9 MB. Free memory was 181.6 MB in the beginning and 165.2 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:17:28,149 INFO L168 Benchmark]: TraceAbstraction took 3213.76 ms. Allocated memory was 202.9 MB in the beginning and 246.4 MB in the end (delta: 43.5 MB). Free memory was 164.5 MB in the beginning and 180.0 MB in the end (delta: -15.5 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:17:28,153 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 290.94 ms. Allocated memory is still 140.0 MB. Free memory was 103.0 MB in the beginning and 92.4 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.40 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 92.4 MB in the beginning and 181.6 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 394.89 ms. Allocated memory is still 202.9 MB. Free memory was 181.6 MB in the beginning and 165.2 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3213.76 ms. Allocated memory was 202.9 MB in the beginning and 246.4 MB in the end (delta: 43.5 MB). Free memory was 164.5 MB in the beginning and 180.0 MB in the end (delta: -15.5 MB). Peak memory consumption was 28.1 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: 3.1s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 1.7s, 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, 1.3s 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, 0.7s 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...