/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:20:14,017 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 20:20:14,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:20:14,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:20:14,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:20:14,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:20:14,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:20:14,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:20:14,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:20:14,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:20:14,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:20:14,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:20:14,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:20:14,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:20:14,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:20:14,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:20:14,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:20:14,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:20:14,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:20:14,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:20:14,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:20:14,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:20:14,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:20:14,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:20:14,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:20:14,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:20:14,080 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 20:20:14,097 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:20:14,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:20:14,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:20:14,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:20:14,099 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:20:14,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:20:14,100 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:20:14,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:20:14,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:20:14,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:20:14,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:20:14,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:20:14,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:20:14,101 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:20:14,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:20:14,102 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:20:14,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:20:14,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:20:14,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:20:14,103 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:20:14,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:20:14,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:20:14,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:20:14,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:20:14,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:20:14,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:20:14,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:20:14,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:20:14,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:20:14,105 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 20:20:14,496 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:20:14,515 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:20:14,522 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:20:14,523 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:20:14,526 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:20:14,527 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-07-21 20:20:14,622 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/196d77017/088e0332656f4815aab65568f19c6680/FLAG264d35ca2 [2020-07-21 20:20:15,191 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:20:15,191 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i [2020-07-21 20:20:15,202 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/196d77017/088e0332656f4815aab65568f19c6680/FLAG264d35ca2 [2020-07-21 20:20:15,542 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/196d77017/088e0332656f4815aab65568f19c6680 [2020-07-21 20:20:15,554 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:20:15,558 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:20:15,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:20:15,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:20:15,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:20:15,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:20:15" (1/1) ... [2020-07-21 20:20:15,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a922da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:20:15, skipping insertion in model container [2020-07-21 20:20:15,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:20:15" (1/1) ... [2020-07-21 20:20:15,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:20:15,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:20:15,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:20:15,806 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:20:15,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:20:15,849 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:20:15,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:20:15 WrapperNode [2020-07-21 20:20:15,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:20:15,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:20:15,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:20:15,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:20:15,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:20:15" (1/1) ... [2020-07-21 20:20:15,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:20:15" (1/1) ... [2020-07-21 20:20:15,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:20:15" (1/1) ... [2020-07-21 20:20:15,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:20:15" (1/1) ... [2020-07-21 20:20:15,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:20:15" (1/1) ... [2020-07-21 20:20:15,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:20:15" (1/1) ... [2020-07-21 20:20:15,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:20:15" (1/1) ... [2020-07-21 20:20:15,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:20:15,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:20:15,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:20:15,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:20:15,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:20:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-21 20:20:16,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:20:16,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:20:16,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:20:16,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:20:16,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:20:16,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:20:16,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 20:20:16,044 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:20:16,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:20:16,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:20:16,250 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:20:16,250 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 20:20:16,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:20:16 BoogieIcfgContainer [2020-07-21 20:20:16,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:20:16,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:20:16,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:20:16,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:20:16,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:20:15" (1/3) ... [2020-07-21 20:20:16,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41be5fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:20:16, skipping insertion in model container [2020-07-21 20:20:16,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:20:15" (2/3) ... [2020-07-21 20:20:16,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41be5fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:20:16, skipping insertion in model container [2020-07-21 20:20:16,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:20:16" (3/3) ... [2020-07-21 20:20:16,264 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-07-21 20:20:16,277 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:20:16,285 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:20:16,300 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:20:16,354 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:20:16,355 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:20:16,355 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:20:16,356 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:20:16,356 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:20:16,356 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:20:16,357 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:20:16,357 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:20:16,388 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 20:20:16,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 20:20:16,394 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:20:16,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:20:16,396 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:20:16,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:20:16,405 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-07-21 20:20:16,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:20:16,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795510840] [2020-07-21 20:20:16,422 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:20:16,491 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:20:16,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:20:16,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 20:20:16,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:20:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:20:16,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:20:16,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795510840] [2020-07-21 20:20:16,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:20:16,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 20:20:16,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839269052] [2020-07-21 20:20:16,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:20:16,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:20:16,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:20:16,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:20:16,602 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-21 20:20:16,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:20:16,687 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-07-21 20:20:16,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:20:16,689 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 20:20:16,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:20:16,697 INFO L225 Difference]: With dead ends: 42 [2020-07-21 20:20:16,698 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 20:20:16,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:20:16,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 20:20:16,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 20:20:16,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 20:20:16,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-07-21 20:20:16,741 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-07-21 20:20:16,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:20:16,742 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-07-21 20:20:16,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:20:16,742 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-07-21 20:20:16,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 20:20:16,743 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:20:16,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:20:16,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:20:16,957 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:20:16,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:20:16,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-07-21 20:20:16,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:20:16,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856954498] [2020-07-21 20:20:16,959 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:20:16,992 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:20:16,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:20:16,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 20:20:16,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:20:17,132 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 20:20:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:20:17,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:20:17,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:20:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:20:17,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856954498] [2020-07-21 20:20:17,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:20:17,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 20:20:17,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779722435] [2020-07-21 20:20:17,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 20:20:17,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:20:17,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 20:20:17,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-07-21 20:20:17,387 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 14 states. [2020-07-21 20:20:17,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:20:17,752 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-07-21 20:20:17,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 20:20:17,753 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2020-07-21 20:20:17,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:20:17,754 INFO L225 Difference]: With dead ends: 39 [2020-07-21 20:20:17,754 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 20:20:17,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-07-21 20:20:17,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 20:20:17,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2020-07-21 20:20:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 20:20:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-21 20:20:17,765 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2020-07-21 20:20:17,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:20:17,765 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-21 20:20:17,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 20:20:17,766 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-21 20:20:17,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 20:20:17,767 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:20:17,767 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:20:17,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:20:17,984 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:20:17,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:20:17,985 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-07-21 20:20:17,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:20:17,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014748959] [2020-07-21 20:20:17,987 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:20:18,012 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:20:18,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:20:18,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:20:18,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:20:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 20:20:18,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:20:18,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014748959] [2020-07-21 20:20:18,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:20:18,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:20:18,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966836294] [2020-07-21 20:20:18,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:20:18,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:20:18,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:20:18,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:20:18,036 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2020-07-21 20:20:18,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:20:18,066 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-07-21 20:20:18,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:20:18,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 20:20:18,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:20:18,068 INFO L225 Difference]: With dead ends: 36 [2020-07-21 20:20:18,069 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 20:20:18,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:20:18,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 20:20:18,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-21 20:20:18,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-21 20:20:18,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-07-21 20:20:18,077 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2020-07-21 20:20:18,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:20:18,078 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-07-21 20:20:18,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:20:18,078 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-07-21 20:20:18,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 20:20:18,079 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:20:18,079 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:20:18,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:20:18,283 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:20:18,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:20:18,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-07-21 20:20:18,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:20:18,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766622323] [2020-07-21 20:20:18,285 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) [2020-07-21 20:20:18,311 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:20:18,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:20:18,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 5 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:20:18,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:20:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:20:18,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:20:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:20:18,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766622323] [2020-07-21 20:20:18,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:20:18,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 20:20:18,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131294005] [2020-07-21 20:20:18,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 20:20:18,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:20:18,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 20:20:18,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-21 20:20:18,398 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2020-07-21 20:20:18,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:20:18,451 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-07-21 20:20:18,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 20:20:18,451 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-07-21 20:20:18,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:20:18,452 INFO L225 Difference]: With dead ends: 36 [2020-07-21 20:20:18,452 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 20:20:18,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-21 20:20:18,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 20:20:18,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-07-21 20:20:18,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 20:20:18,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-21 20:20:18,459 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2020-07-21 20:20:18,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:20:18,460 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-21 20:20:18,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 20:20:18,460 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-21 20:20:18,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 20:20:18,461 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:20:18,461 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:20:18,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:20:18,675 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:20:18,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:20:18,677 INFO L82 PathProgramCache]: Analyzing trace with hash -971600090, now seen corresponding path program 2 times [2020-07-21 20:20:18,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:20:18,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409288005] [2020-07-21 20:20:18,678 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:20:18,719 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:20:18,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:20:18,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 20:20:18,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:20:18,836 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 20:20:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:20:18,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:20:18,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:20:19,223 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:20:19,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409288005] [2020-07-21 20:20:19,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:20:19,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-07-21 20:20:19,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368247143] [2020-07-21 20:20:19,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 20:20:19,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:20:19,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 20:20:19,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-07-21 20:20:19,227 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 22 states. [2020-07-21 20:20:20,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:20:20,257 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-07-21 20:20:20,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 20:20:20,258 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2020-07-21 20:20:20,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:20:20,261 INFO L225 Difference]: With dead ends: 44 [2020-07-21 20:20:20,261 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 20:20:20,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 20:20:20,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 20:20:20,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-07-21 20:20:20,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 20:20:20,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-07-21 20:20:20,284 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-07-21 20:20:20,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:20:20,284 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-07-21 20:20:20,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 20:20:20,285 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-07-21 20:20:20,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 20:20:20,289 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:20:20,289 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:20:20,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:20:20,503 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:20:20,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:20:20,503 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 3 times [2020-07-21 20:20:20,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:20:20,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185400816] [2020-07-21 20:20:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:20:20,541 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:20:20,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:20:20,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 20:20:20,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:20:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:20:20,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:20:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:20:20,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185400816] [2020-07-21 20:20:20,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:20:20,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-07-21 20:20:20,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635937700] [2020-07-21 20:20:20,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 20:20:20,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:20:20,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 20:20:20,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2020-07-21 20:20:20,758 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 16 states. [2020-07-21 20:20:20,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:20:20,869 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-07-21 20:20:20,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 20:20:20,870 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2020-07-21 20:20:20,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:20:20,871 INFO L225 Difference]: With dead ends: 46 [2020-07-21 20:20:20,871 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 20:20:20,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2020-07-21 20:20:20,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 20:20:20,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-07-21 20:20:20,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 20:20:20,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-07-21 20:20:20,879 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 26 [2020-07-21 20:20:20,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:20:20,880 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-07-21 20:20:20,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 20:20:20,880 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-07-21 20:20:20,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 20:20:20,881 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:20:20,881 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:20:21,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:20:21,096 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:20:21,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:20:21,097 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 4 times [2020-07-21 20:20:21,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:20:21,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317084694] [2020-07-21 20:20:21,098 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:20:21,126 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:20:21,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 20:20:21,127 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:20:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 20:20:21,140 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:20:21,161 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 20:20:21,162 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 20:20:21,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:20:21,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:20:21 BoogieIcfgContainer [2020-07-21 20:20:21,410 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:20:21,413 INFO L168 Benchmark]: Toolchain (without parser) took 5856.11 ms. Allocated memory was 134.7 MB in the beginning and 256.9 MB in the end (delta: 122.2 MB). Free memory was 100.2 MB in the beginning and 89.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 132.6 MB. Max. memory is 7.1 GB. [2020-07-21 20:20:21,414 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 134.7 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 20:20:21,415 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.81 ms. Allocated memory is still 134.7 MB. Free memory was 99.8 MB in the beginning and 90.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-21 20:20:21,416 INFO L168 Benchmark]: Boogie Preprocessor took 32.79 ms. Allocated memory is still 134.7 MB. Free memory was 90.6 MB in the beginning and 89.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. [2020-07-21 20:20:21,417 INFO L168 Benchmark]: RCFGBuilder took 369.19 ms. Allocated memory was 134.7 MB in the beginning and 198.7 MB in the end (delta: 64.0 MB). Free memory was 88.9 MB in the beginning and 166.5 MB in the end (delta: -77.6 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-21 20:20:21,418 INFO L168 Benchmark]: TraceAbstraction took 5154.24 ms. Allocated memory was 198.7 MB in the beginning and 256.9 MB in the end (delta: 58.2 MB). Free memory was 165.8 MB in the beginning and 89.7 MB in the end (delta: 76.0 MB). Peak memory consumption was 134.2 MB. Max. memory is 7.1 GB. [2020-07-21 20:20:21,422 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 ms. Allocated memory is still 134.7 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 291.81 ms. Allocated memory is still 134.7 MB. Free memory was 99.8 MB in the beginning and 90.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.79 ms. Allocated memory is still 134.7 MB. Free memory was 90.6 MB in the beginning and 89.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 369.19 ms. Allocated memory was 134.7 MB in the beginning and 198.7 MB in the end (delta: 64.0 MB). Free memory was 88.9 MB in the beginning and 166.5 MB in the end (delta: -77.6 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5154.24 ms. Allocated memory was 198.7 MB in the beginning and 256.9 MB in the end (delta: 58.2 MB). Free memory was 165.8 MB in the beginning and 89.7 MB in the end (delta: 76.0 MB). Peak memory consumption was 134.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, j=10, n=6, n=0] [L13] COND TRUE i<=n VAL [i=1, j=10, n=0, n=6] [L14] COND TRUE i