/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 NUM_FUNCTIONS --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 14:01:26,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:01:26,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:01:26,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:01:26,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:01:26,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:01:26,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:01:26,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:01:26,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:01:26,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:01:26,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:01:26,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:01:26,123 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:01:26,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:01:26,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:01:26,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:01:26,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:01:26,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:01:26,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:01:26,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:01:26,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:01:26,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:01:26,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:01:26,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:01:26,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:01:26,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:01:26,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:01:26,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:01:26,151 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 14:01:26,167 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:01:26,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:01:26,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:01:26,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:01:26,169 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:01:26,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:01:26,170 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:01:26,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:01:26,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:01:26,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:01:26,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:01:26,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:01:26,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:01:26,171 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:01:26,171 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:01:26,171 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:01:26,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:01:26,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:01:26,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:01:26,172 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:01:26,173 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:01:26,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:01:26,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:01:26,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:01:26,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:01:26,174 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:01:26,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:26,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:01:26,175 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:01:26,175 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 -> NUM_FUNCTIONS 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 14:01:26,543 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:01:26,557 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:01:26,561 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:01:26,562 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:01:26,563 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:01:26,564 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-07-21 14:01:26,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edaacc3cb/b8cba2615727445fbd0bb5cd58def7d3/FLAG3a7fca67b [2020-07-21 14:01:27,103 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:01:27,104 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i [2020-07-21 14:01:27,111 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edaacc3cb/b8cba2615727445fbd0bb5cd58def7d3/FLAG3a7fca67b [2020-07-21 14:01:27,519 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edaacc3cb/b8cba2615727445fbd0bb5cd58def7d3 [2020-07-21 14:01:27,533 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:01:27,537 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:01:27,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:01:27,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:01:27,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:01:27,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:01:27" (1/1) ... [2020-07-21 14:01:27,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75fe535d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:27, skipping insertion in model container [2020-07-21 14:01:27,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:01:27" (1/1) ... [2020-07-21 14:01:27,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:01:27,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:01:27,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:01:27,778 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:01:27,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:01:27,810 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:01:27,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:27 WrapperNode [2020-07-21 14:01:27,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:01:27,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:01:27,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:01:27,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:01:27,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:27" (1/1) ... [2020-07-21 14:01:27,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:27" (1/1) ... [2020-07-21 14:01:27,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:27" (1/1) ... [2020-07-21 14:01:27,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:27" (1/1) ... [2020-07-21 14:01:27,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:27" (1/1) ... [2020-07-21 14:01:27,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:27" (1/1) ... [2020-07-21 14:01:27,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:27" (1/1) ... [2020-07-21 14:01:27,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:01:27,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:01:27,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:01:27,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:01:27,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:27" (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 14:01:28,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:01:28,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:01:28,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 14:01:28,003 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:01:28,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:01:28,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 14:01:28,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 14:01:28,004 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:01:28,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:01:28,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:01:28,227 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:01:28,227 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 14:01:28,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:01:28 BoogieIcfgContainer [2020-07-21 14:01:28,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:01:28,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:01:28,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:01:28,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:01:28,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:01:27" (1/3) ... [2020-07-21 14:01:28,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65371b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:01:28, skipping insertion in model container [2020-07-21 14:01:28,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:01:27" (2/3) ... [2020-07-21 14:01:28,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65371b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:01:28, skipping insertion in model container [2020-07-21 14:01:28,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:01:28" (3/3) ... [2020-07-21 14:01:28,243 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-07-21 14:01:28,255 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:01:28,264 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:01:28,281 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:01:28,310 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:01:28,310 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:01:28,310 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:01:28,310 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:01:28,311 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:01:28,311 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:01:28,311 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:01:28,311 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:01:28,341 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 14:01:28,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 14:01:28,356 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:28,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:28,358 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:28,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:28,368 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-07-21 14:01:28,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:28,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190614915] [2020-07-21 14:01:28,405 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 14:01:28,491 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:01:28,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:28,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 14:01:28,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:28,522 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 14:01:28,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:01:28,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190614915] [2020-07-21 14:01:28,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:01:28,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 14:01:28,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138929313] [2020-07-21 14:01:28,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 14:01:28,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:28,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 14:01:28,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 14:01:28,546 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-21 14:01:28,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:28,567 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-07-21 14:01:28,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 14:01:28,569 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 14:01:28,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:28,577 INFO L225 Difference]: With dead ends: 31 [2020-07-21 14:01:28,577 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 14:01:28,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 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 14:01:28,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 14:01:28,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 14:01:28,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 14:01:28,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-07-21 14:01:28,620 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-07-21 14:01:28,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:28,621 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-07-21 14:01:28,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 14:01:28,621 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-07-21 14:01:28,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 14:01:28,622 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:28,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:28,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:28,836 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:28,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:28,838 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-07-21 14:01:28,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:28,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079843345] [2020-07-21 14:01:28,839 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 14:01:28,876 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:01:28,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:28,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:01:28,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:28,946 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 14:01:28,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:01:28,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079843345] [2020-07-21 14:01:28,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:01:28,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:01:28,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456039698] [2020-07-21 14:01:28,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:01:28,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:28,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:01:28,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:01:28,951 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-07-21 14:01:29,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:29,004 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-07-21 14:01:29,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:01:29,005 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 14:01:29,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:29,006 INFO L225 Difference]: With dead ends: 23 [2020-07-21 14:01:29,006 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 14:01:29,007 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 14:01:29,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 14:01:29,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 14:01:29,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 14:01:29,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-07-21 14:01:29,014 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-07-21 14:01:29,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:29,014 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-07-21 14:01:29,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:01:29,015 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-07-21 14:01:29,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 14:01:29,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:29,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:29,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:29,227 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:29,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:29,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-07-21 14:01:29,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:29,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773178778] [2020-07-21 14:01:29,231 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 14:01:29,265 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:01:29,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:29,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 14:01:29,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:29,365 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:01:29,405 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 14:01:29,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:01:29,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:01:29,622 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 14:01:29,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773178778] [2020-07-21 14:01:29,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:01:29,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 14:01:29,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562299980] [2020-07-21 14:01:29,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 14:01:29,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:29,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 14:01:29,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-07-21 14:01:29,628 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 14 states. [2020-07-21 14:01:30,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:30,009 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-07-21 14:01:30,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 14:01:30,011 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2020-07-21 14:01:30,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:30,012 INFO L225 Difference]: With dead ends: 39 [2020-07-21 14:01:30,012 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 14:01:30,014 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 14:01:30,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 14:01:30,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2020-07-21 14:01:30,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 14:01:30,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-21 14:01:30,025 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2020-07-21 14:01:30,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:30,026 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-21 14:01:30,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 14:01:30,027 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-21 14:01:30,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 14:01:30,030 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:30,030 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:30,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:30,245 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:30,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:30,245 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-07-21 14:01:30,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:30,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71354280] [2020-07-21 14:01:30,246 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 14:01:30,280 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:01:30,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:30,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:01:30,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:30,303 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 14:01:30,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:01:30,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71354280] [2020-07-21 14:01:30,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:01:30,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:01:30,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007513379] [2020-07-21 14:01:30,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:01:30,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:30,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:01:30,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:01:30,310 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2020-07-21 14:01:30,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:30,342 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-07-21 14:01:30,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:01:30,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 14:01:30,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:30,345 INFO L225 Difference]: With dead ends: 36 [2020-07-21 14:01:30,346 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 14:01:30,346 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 14:01:30,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 14:01:30,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-21 14:01:30,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-21 14:01:30,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-07-21 14:01:30,363 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2020-07-21 14:01:30,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:30,363 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-07-21 14:01:30,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:01:30,364 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-07-21 14:01:30,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 14:01:30,365 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:30,368 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:30,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:30,583 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:30,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:30,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-07-21 14:01:30,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:30,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627400092] [2020-07-21 14:01:30,585 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 14:01:30,636 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:01:30,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:30,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:01:30,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:30,676 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 14:01:30,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:01:30,715 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 14:01:30,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627400092] [2020-07-21 14:01:30,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:01:30,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 14:01:30,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808409371] [2020-07-21 14:01:30,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 14:01:30,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:30,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 14:01:30,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:01:30,717 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2020-07-21 14:01:30,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:30,764 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-07-21 14:01:30,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 14:01:30,765 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-07-21 14:01:30,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:30,766 INFO L225 Difference]: With dead ends: 36 [2020-07-21 14:01:30,766 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 14:01:30,767 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 14:01:30,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 14:01:30,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-07-21 14:01:30,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 14:01:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-21 14:01:30,773 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2020-07-21 14:01:30,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:30,774 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-21 14:01:30,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 14:01:30,774 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-21 14:01:30,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 14:01:30,775 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:30,775 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:30,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:30,989 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:30,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:30,989 INFO L82 PathProgramCache]: Analyzing trace with hash -971600090, now seen corresponding path program 2 times [2020-07-21 14:01:30,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:30,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039836114] [2020-07-21 14:01:30,990 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 14:01:31,026 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:01:31,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:31,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 14:01:31,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:31,161 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:01:31,194 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 14:01:31,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:01:31,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:01:31,598 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 14:01:31,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039836114] [2020-07-21 14:01:31,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:01:31,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-07-21 14:01:31,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905996855] [2020-07-21 14:01:31,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 14:01:31,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:31,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 14:01:31,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-07-21 14:01:31,605 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 22 states. [2020-07-21 14:01:32,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:32,538 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-07-21 14:01:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 14:01:32,538 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2020-07-21 14:01:32,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:32,541 INFO L225 Difference]: With dead ends: 44 [2020-07-21 14:01:32,541 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 14:01:32,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 14:01:32,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 14:01:32,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-07-21 14:01:32,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 14:01:32,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-07-21 14:01:32,550 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-07-21 14:01:32,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:32,551 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-07-21 14:01:32,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 14:01:32,551 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-07-21 14:01:32,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 14:01:32,552 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:32,552 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:32,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:32,753 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:32,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:32,754 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 3 times [2020-07-21 14:01:32,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:32,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704193428] [2020-07-21 14:01:32,755 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 14:01:32,777 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:01:32,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:01:32,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 14:01:32,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:01:32,858 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 14:01:32,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:01:32,957 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 14:01:32,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704193428] [2020-07-21 14:01:32,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:01:32,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-07-21 14:01:32,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649420699] [2020-07-21 14:01:32,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 14:01:32,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:01:32,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 14:01:32,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2020-07-21 14:01:32,961 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 16 states. [2020-07-21 14:01:33,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:01:33,029 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-07-21 14:01:33,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 14:01:33,032 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2020-07-21 14:01:33,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:01:33,033 INFO L225 Difference]: With dead ends: 46 [2020-07-21 14:01:33,033 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 14:01:33,033 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 14:01:33,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 14:01:33,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-07-21 14:01:33,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 14:01:33,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-07-21 14:01:33,041 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 26 [2020-07-21 14:01:33,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:01:33,041 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-07-21 14:01:33,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 14:01:33,041 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-07-21 14:01:33,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 14:01:33,042 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:01:33,043 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:01:33,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:33,255 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:01:33,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:01:33,256 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 4 times [2020-07-21 14:01:33,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:01:33,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921789196] [2020-07-21 14:01:33,257 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:33,293 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:01:33,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 14:01:33,294 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 14:01:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 14:01:33,306 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 14:01:33,327 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 14:01:33,327 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 14:01:33,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:01:33,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 02:01:33 BoogieIcfgContainer [2020-07-21 14:01:33,573 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 14:01:33,575 INFO L168 Benchmark]: Toolchain (without parser) took 6039.49 ms. Allocated memory was 139.5 MB in the beginning and 259.0 MB in the end (delta: 119.5 MB). Free memory was 98.4 MB in the beginning and 88.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 130.0 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:33,576 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 117.0 MB in the beginning and 116.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 14:01:33,577 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.90 ms. Allocated memory is still 139.5 MB. Free memory was 98.0 MB in the beginning and 88.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:33,578 INFO L168 Benchmark]: Boogie Preprocessor took 124.45 ms. Allocated memory was 139.5 MB in the beginning and 197.1 MB in the end (delta: 57.7 MB). Free memory was 88.7 MB in the beginning and 175.4 MB in the end (delta: -86.7 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:33,579 INFO L168 Benchmark]: RCFGBuilder took 295.71 ms. Allocated memory is still 197.1 MB. Free memory was 175.4 MB in the beginning and 163.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:33,580 INFO L168 Benchmark]: TraceAbstraction took 5338.84 ms. Allocated memory was 197.1 MB in the beginning and 259.0 MB in the end (delta: 61.9 MB). Free memory was 163.3 MB in the beginning and 88.0 MB in the end (delta: 75.3 MB). Peak memory consumption was 137.2 MB. Max. memory is 7.1 GB. [2020-07-21 14:01:33,585 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 117.0 MB in the beginning and 116.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 273.90 ms. Allocated memory is still 139.5 MB. Free memory was 98.0 MB in the beginning and 88.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.45 ms. Allocated memory was 139.5 MB in the beginning and 197.1 MB in the end (delta: 57.7 MB). Free memory was 88.7 MB in the beginning and 175.4 MB in the end (delta: -86.7 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 295.71 ms. Allocated memory is still 197.1 MB. Free memory was 175.4 MB in the beginning and 163.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5338.84 ms. Allocated memory was 197.1 MB in the beginning and 259.0 MB in the end (delta: 61.9 MB). Free memory was 163.3 MB in the beginning and 88.0 MB in the end (delta: 75.3 MB). Peak memory consumption was 137.2 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=0, n=6] [L13] COND TRUE i<=n VAL [i=1, j=10, n=0, n=6] [L14] COND TRUE i