/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-crafted-1/nested5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:49:46,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:49:46,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:49:46,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:49:46,387 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:49:46,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:49:46,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:49:46,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:49:46,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:49:46,398 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:49:46,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:49:46,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:49:46,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:49:46,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:49:46,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:49:46,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:49:46,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:49:46,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:49:46,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:49:46,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:49:46,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:49:46,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:49:46,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:49:46,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:49:46,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:49:46,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:49:46,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:49:46,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:49:46,447 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 20:49:46,470 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:49:46,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:49:46,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:49:46,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:49:46,477 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:49:46,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:49:46,477 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:49:46,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:49:46,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:49:46,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:49:46,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:49:46,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:49:46,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:49:46,479 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:49:46,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:49:46,479 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:49:46,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:49:46,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:49:46,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:49:46,483 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:49:46,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:49:46,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:49:46,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:49:46,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:49:46,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:49:46,484 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:49:46,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:49:46,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:49:46,487 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:49:46,488 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 20:49:46,884 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:49:46,917 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:49:46,926 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:49:46,928 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:49:46,929 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:49:46,932 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-07-21 20:49:47,031 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bb2bf337/27775d541a0b437191306aa5f33504d1/FLAG51bf4cf04 [2020-07-21 20:49:47,733 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:49:47,734 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-07-21 20:49:47,743 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bb2bf337/27775d541a0b437191306aa5f33504d1/FLAG51bf4cf04 [2020-07-21 20:49:48,016 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bb2bf337/27775d541a0b437191306aa5f33504d1 [2020-07-21 20:49:48,032 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:49:48,037 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:49:48,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:49:48,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:49:48,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:49:48,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:49:48" (1/1) ... [2020-07-21 20:49:48,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@547a0f3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:49:48, skipping insertion in model container [2020-07-21 20:49:48,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:49:48" (1/1) ... [2020-07-21 20:49:48,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:49:48,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:49:48,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:49:48,390 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:49:48,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:49:48,440 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:49:48,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:49:48 WrapperNode [2020-07-21 20:49:48,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:49:48,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:49:48,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:49:48,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:49:48,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:49:48" (1/1) ... [2020-07-21 20:49:48,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:49:48" (1/1) ... [2020-07-21 20:49:48,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:49:48" (1/1) ... [2020-07-21 20:49:48,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:49:48" (1/1) ... [2020-07-21 20:49:48,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:49:48" (1/1) ... [2020-07-21 20:49:48,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:49:48" (1/1) ... [2020-07-21 20:49:48,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:49:48" (1/1) ... [2020-07-21 20:49:48,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:49:48,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:49:48,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:49:48,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:49:48,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:49:48" (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 20:49:48,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:49:48,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:49:48,741 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:49:48,741 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:49:48,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:49:48,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:49:48,742 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:49:48,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:49:48,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:49:49,139 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:49:49,140 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-07-21 20:49:49,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:49:49 BoogieIcfgContainer [2020-07-21 20:49:49,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:49:49,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:49:49,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:49:49,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:49:49,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:49:48" (1/3) ... [2020-07-21 20:49:49,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565aaa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:49:49, skipping insertion in model container [2020-07-21 20:49:49,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:49:48" (2/3) ... [2020-07-21 20:49:49,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565aaa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:49:49, skipping insertion in model container [2020-07-21 20:49:49,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:49:49" (3/3) ... [2020-07-21 20:49:49,180 INFO L109 eAbstractionObserver]: Analyzing ICFG nested5-1.c [2020-07-21 20:49:49,209 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:49:49,229 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:49:49,259 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:49:49,317 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:49:49,317 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:49:49,318 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:49:49,318 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:49:49,318 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:49:49,318 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:49:49,318 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:49:49,318 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:49:49,357 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-21 20:49:49,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 20:49:49,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:49:49,369 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:49:49,370 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:49:49,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:49:49,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2037426592, now seen corresponding path program 1 times [2020-07-21 20:49:49,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:49:49,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933688902] [2020-07-21 20:49:49,399 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 20:49:49,513 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:49:49,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:49:49,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 20:49:49,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:49:49,550 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 20:49:49,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:49:49,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933688902] [2020-07-21 20:49:49,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:49:49,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 20:49:49,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436419570] [2020-07-21 20:49:49,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 20:49:49,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:49:49,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 20:49:49,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 20:49:49,583 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-07-21 20:49:49,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:49:49,621 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2020-07-21 20:49:49,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 20:49:49,623 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-07-21 20:49:49,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:49:49,644 INFO L225 Difference]: With dead ends: 49 [2020-07-21 20:49:49,644 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 20:49:49,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 20:49:49,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 20:49:49,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-21 20:49:49,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 20:49:49,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-21 20:49:49,733 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2020-07-21 20:49:49,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:49:49,734 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-21 20:49:49,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 20:49:49,734 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-21 20:49:49,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 20:49:49,735 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:49:49,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:49:49,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:49:49,953 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:49:49,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:49:49,955 INFO L82 PathProgramCache]: Analyzing trace with hash 2031885466, now seen corresponding path program 1 times [2020-07-21 20:49:49,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:49:49,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371984541] [2020-07-21 20:49:49,956 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 20:49:50,017 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:49:50,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:49:50,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:49:50,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:49:50,064 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 20:49:50,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:49:50,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371984541] [2020-07-21 20:49:50,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:49:50,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:49:50,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637062446] [2020-07-21 20:49:50,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:49:50,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:49:50,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:49:50,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:49:50,071 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2020-07-21 20:49:50,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:49:50,122 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-07-21 20:49:50,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:49:50,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-21 20:49:50,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:49:50,125 INFO L225 Difference]: With dead ends: 48 [2020-07-21 20:49:50,126 INFO L226 Difference]: Without dead ends: 31 [2020-07-21 20:49:50,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 20:49:50,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-21 20:49:50,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-07-21 20:49:50,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-21 20:49:50,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-07-21 20:49:50,139 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2020-07-21 20:49:50,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:49:50,139 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-07-21 20:49:50,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:49:50,140 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-07-21 20:49:50,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 20:49:50,141 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:49:50,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:49:50,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:49:50,356 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:49:50,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:49:50,358 INFO L82 PathProgramCache]: Analyzing trace with hash -935219944, now seen corresponding path program 1 times [2020-07-21 20:49:50,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:49:50,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398105604] [2020-07-21 20:49:50,360 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 20:49:50,460 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:49:50,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:49:50,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 20:49:50,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:49:50,504 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 20:49:50,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:49:50,572 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 20:49:50,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398105604] [2020-07-21 20:49:50,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:49:50,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 20:49:50,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099537584] [2020-07-21 20:49:50,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 20:49:50,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:49:50,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 20:49:50,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:49:50,583 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-07-21 20:49:50,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:49:50,742 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2020-07-21 20:49:50,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:49:50,743 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-21 20:49:50,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:49:50,745 INFO L225 Difference]: With dead ends: 54 [2020-07-21 20:49:50,745 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 20:49:50,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-07-21 20:49:50,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 20:49:50,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2020-07-21 20:49:50,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 20:49:50,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-07-21 20:49:50,757 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2020-07-21 20:49:50,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:49:50,758 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-07-21 20:49:50,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 20:49:50,759 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-07-21 20:49:50,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 20:49:50,760 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:49:50,761 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:49:50,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:49:50,977 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:49:50,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:49:50,978 INFO L82 PathProgramCache]: Analyzing trace with hash 924643730, now seen corresponding path program 2 times [2020-07-21 20:49:50,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:49:50,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197820335] [2020-07-21 20:49:50,979 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) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:49:51,037 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:49:51,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:49:51,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 20:49:51,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:49:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:49:51,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:49:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:49:51,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197820335] [2020-07-21 20:49:51,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:49:51,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 20:49:51,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732146334] [2020-07-21 20:49:51,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 20:49:51,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:49:51,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 20:49:51,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-07-21 20:49:51,390 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 12 states. [2020-07-21 20:49:54,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:49:54,130 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2020-07-21 20:49:54,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 20:49:54,132 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-07-21 20:49:54,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:49:54,133 INFO L225 Difference]: With dead ends: 72 [2020-07-21 20:49:54,134 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 20:49:54,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=93, Invalid=146, Unknown=1, NotChecked=0, Total=240 [2020-07-21 20:49:54,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 20:49:54,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2020-07-21 20:49:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 20:49:54,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-07-21 20:49:54,145 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 22 [2020-07-21 20:49:54,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:49:54,145 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-07-21 20:49:54,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 20:49:54,146 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-07-21 20:49:54,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 20:49:54,147 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:49:54,148 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:49:54,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:49:54,363 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:49:54,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:49:54,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1447833594, now seen corresponding path program 3 times [2020-07-21 20:49:54,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:49:54,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688730764] [2020-07-21 20:49:54,367 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 20:49:54,421 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:49:54,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:49:54,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 20:49:54,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:49:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:49:54,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:49:54,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:54,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:54,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:54,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:54,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:54,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:54,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:54,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:54,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:54,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:54,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:54,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:54,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:54,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:55,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:55,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:55,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:55,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:55,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:55,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:55,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:55,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:55,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:55,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:55,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:55,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:55,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:55,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:55,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:55,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:55,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:49:55,320 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 5 [2020-07-21 20:49:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 20:49:55,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688730764] [2020-07-21 20:49:55,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:49:55,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2020-07-21 20:49:55,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38512472] [2020-07-21 20:49:55,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 20:49:55,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:49:55,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 20:49:55,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-07-21 20:49:55,489 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 21 states. [2020-07-21 20:49:56,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:49:56,009 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2020-07-21 20:49:56,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 20:49:56,013 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 34 [2020-07-21 20:49:56,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:49:56,015 INFO L225 Difference]: With dead ends: 82 [2020-07-21 20:49:56,015 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 20:49:56,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2020-07-21 20:49:56,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 20:49:56,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 20:49:56,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 20:49:56,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 20:49:56,031 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-07-21 20:49:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:49:56,032 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 20:49:56,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 20:49:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 20:49:56,032 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 20:49:56,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:49:56,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 20:49:56,535 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 24 [2020-07-21 20:49:56,565 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 20:49:56,566 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 20:49:56,566 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 20:49:56,566 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 20:49:56,566 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 20:49:56,567 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 20:49:56,567 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 25) no Hoare annotation was computed. [2020-07-21 20:49:56,567 INFO L268 CegarLoopResult]: For program point L19-2(lines 19 23) no Hoare annotation was computed. [2020-07-21 20:49:56,567 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 23) the Hoare annotation is: (or (= 0 main_~v~0) (= 10 main_~v~0)) [2020-07-21 20:49:56,567 INFO L264 CegarLoopResult]: At program point L20-2(lines 20 23) the Hoare annotation is: (or (= 0 main_~v~0) (= 10 main_~v~0)) [2020-07-21 20:49:56,568 INFO L268 CegarLoopResult]: For program point L21-2(line 21) no Hoare annotation was computed. [2020-07-21 20:49:56,568 INFO L264 CegarLoopResult]: At program point L21-3(line 21) the Hoare annotation is: (or (= 1 main_~v~0) (= 6 main_~v~0) (= 4 main_~v~0) (= 2 main_~v~0) (= 0 main_~v~0) (= 9 main_~v~0) (= 7 main_~v~0) (= 5 main_~v~0) (= 3 main_~v~0) (= 10 main_~v~0) (= 8 main_~v~0)) [2020-07-21 20:49:56,568 INFO L264 CegarLoopResult]: At program point L21-4(line 21) the Hoare annotation is: (= 10 main_~v~0) [2020-07-21 20:49:56,568 INFO L268 CegarLoopResult]: For program point L17-2(lines 17 23) no Hoare annotation was computed. [2020-07-21 20:49:56,568 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 23) the Hoare annotation is: (or (= 0 main_~v~0) (= 10 main_~v~0)) [2020-07-21 20:49:56,568 INFO L268 CegarLoopResult]: For program point L17-4(lines 17 23) no Hoare annotation was computed. [2020-07-21 20:49:56,568 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 25) no Hoare annotation was computed. [2020-07-21 20:49:56,569 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 25) the Hoare annotation is: true [2020-07-21 20:49:56,569 INFO L268 CegarLoopResult]: For program point L22(lines 20 23) no Hoare annotation was computed. [2020-07-21 20:49:56,569 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 23) no Hoare annotation was computed. [2020-07-21 20:49:56,569 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 23) the Hoare annotation is: (or (= 0 main_~v~0) (= 10 main_~v~0)) [2020-07-21 20:49:56,569 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-21 20:49:56,569 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-21 20:49:56,570 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 20:49:56,570 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-21 20:49:56,570 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-21 20:49:56,570 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-21 20:49:56,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:49:56 BoogieIcfgContainer [2020-07-21 20:49:56,612 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:49:56,617 INFO L168 Benchmark]: Toolchain (without parser) took 8580.23 ms. Allocated memory was 137.9 MB in the beginning and 248.0 MB in the end (delta: 110.1 MB). Free memory was 101.4 MB in the beginning and 203.6 MB in the end (delta: -102.2 MB). Peak memory consumption was 115.9 MB. Max. memory is 7.1 GB. [2020-07-21 20:49:56,625 INFO L168 Benchmark]: CDTParser took 1.15 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 20:49:56,626 INFO L168 Benchmark]: CACSL2BoogieTranslator took 404.03 ms. Allocated memory is still 137.9 MB. Free memory was 101.0 MB in the beginning and 91.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 20:49:56,627 INFO L168 Benchmark]: Boogie Preprocessor took 57.42 ms. Allocated memory is still 137.9 MB. Free memory was 91.4 MB in the beginning and 90.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 20:49:56,628 INFO L168 Benchmark]: RCFGBuilder took 650.69 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 89.8 MB in the beginning and 168.0 MB in the end (delta: -78.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-21 20:49:56,629 INFO L168 Benchmark]: TraceAbstraction took 7456.00 ms. Allocated memory was 202.9 MB in the beginning and 248.0 MB in the end (delta: 45.1 MB). Free memory was 168.0 MB in the beginning and 203.6 MB in the end (delta: -35.7 MB). Peak memory consumption was 117.5 MB. Max. memory is 7.1 GB. [2020-07-21 20:49:56,633 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.15 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 404.03 ms. Allocated memory is still 137.9 MB. Free memory was 101.0 MB in the beginning and 91.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 57.42 ms. Allocated memory is still 137.9 MB. Free memory was 91.4 MB in the beginning and 90.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 650.69 ms. Allocated memory was 137.9 MB in the beginning and 202.9 MB in the end (delta: 65.0 MB). Free memory was 89.8 MB in the beginning and 168.0 MB in the end (delta: -78.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7456.00 ms. Allocated memory was 202.9 MB in the beginning and 248.0 MB in the end (delta: 45.1 MB). Free memory was 168.0 MB in the beginning and 203.6 MB in the end (delta: -35.7 MB). Peak memory consumption was 117.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((((((((1 == v || 6 == v) || 4 == v) || 2 == v) || 0 == v) || 9 == v) || 7 == v) || 5 == v) || 3 == v) || 10 == v) || 8 == v - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 0 == v || 10 == v - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 0 == v || 10 == v - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 0 == v || 10 == v - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 0 == v || 10 == v - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.9s, OverallIterations: 5, TraceHistogramMax: 10, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 131 SDtfs, 151 SDslu, 457 SDs, 0 SdLazy, 371 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 173 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=4, 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, 5 MinimizatonAttempts, 22 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 16 PreInvPairs, 36 NumberOfFragments, 70 HoareAnnotationTreeSize, 16 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 77 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 100 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 164 ConstructedInterpolants, 0 QuantifiedInterpolants, 11350 SizeOfPredicates, 5 NumberOfNonLiveVariables, 242 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 18/234 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 correct! Received shutdown request...