/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 BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -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 01:42:50,313 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 01:42:50,348 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:42:50,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:42:50,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:42:50,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:42:50,374 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:42:50,377 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:42:50,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:42:50,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:42:50,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:42:50,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:42:50,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:42:50,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:42:50,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:42:50,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:42:50,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:42:50,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:42:50,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:42:50,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:42:50,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:42:50,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:42:50,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:42:50,460 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 01:42:50,504 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:42:50,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:42:50,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:42:50,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:42:50,516 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:42:50,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:42:50,518 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:42:50,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:42:50,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:42:50,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:42:50,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:42:50,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:42:50,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:42:50,520 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:42:50,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:42:50,521 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:42:50,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:42:50,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:42:50,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:42:50,522 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:42:50,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:42:50,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:42:50,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:42:50,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:42:50,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:42:50,523 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:42:50,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:50,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:42:50,524 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:42:50,524 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 -> BIGGEST_EQUIVALENCE_CLASS 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 -> 4 [2020-07-21 01:42:50,957 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:42:50,976 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:42:50,982 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:42:50,984 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:42:50,985 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:42:50,986 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-07-21 01:42:51,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/517f7641c/ceef41652c554d4fa686e7e195d31e55/FLAGf6174b0af [2020-07-21 01:42:51,677 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:42:51,678 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i [2020-07-21 01:42:51,688 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/517f7641c/ceef41652c554d4fa686e7e195d31e55/FLAGf6174b0af [2020-07-21 01:42:51,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/517f7641c/ceef41652c554d4fa686e7e195d31e55 [2020-07-21 01:42:52,007 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:42:52,010 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:42:52,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:42:52,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:42:52,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:42:52,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:42:51" (1/1) ... [2020-07-21 01:42:52,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e02ab94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:52, skipping insertion in model container [2020-07-21 01:42:52,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:42:51" (1/1) ... [2020-07-21 01:42:52,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:42:52,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:42:52,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:42:52,288 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:42:52,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:42:52,335 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:42:52,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:52 WrapperNode [2020-07-21 01:42:52,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:42:52,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:42:52,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:42:52,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:42:52,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:52" (1/1) ... [2020-07-21 01:42:52,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:52" (1/1) ... [2020-07-21 01:42:52,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:52" (1/1) ... [2020-07-21 01:42:52,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:52" (1/1) ... [2020-07-21 01:42:52,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:52" (1/1) ... [2020-07-21 01:42:52,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:52" (1/1) ... [2020-07-21 01:42:52,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:52" (1/1) ... [2020-07-21 01:42:52,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:42:52,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:42:52,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:42:52,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:42:52,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:52" (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 01:42:52,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:42:52,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:42:52,571 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:42:52,571 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:42:52,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:42:52,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:42:52,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 01:42:52,572 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:42:52,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:42:52,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:42:52,836 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:42:52,837 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 01:42:52,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:42:52 BoogieIcfgContainer [2020-07-21 01:42:52,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:42:52,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:42:52,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:42:52,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:42:52,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:42:51" (1/3) ... [2020-07-21 01:42:52,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60093ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:42:52, skipping insertion in model container [2020-07-21 01:42:52,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:42:52" (2/3) ... [2020-07-21 01:42:52,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60093ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:42:52, skipping insertion in model container [2020-07-21 01:42:52,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:42:52" (3/3) ... [2020-07-21 01:42:52,856 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-07-21 01:42:52,873 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:42:52,886 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:42:52,910 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:42:52,966 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:42:52,966 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:42:52,967 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:42:52,967 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:42:52,967 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:42:52,967 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:42:52,967 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:42:52,968 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:42:52,999 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 01:42:53,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 01:42:53,010 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:53,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:53,014 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:53,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:53,022 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2020-07-21 01:42:53,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:53,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980368038] [2020-07-21 01:42:53,038 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 01:42:53,137 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:42:53,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:53,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 01:42:53,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:53,171 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 01:42:53,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:42:53,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980368038] [2020-07-21 01:42:53,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:42:53,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 01:42:53,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92513292] [2020-07-21 01:42:53,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 01:42:53,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:53,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 01:42:53,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:42:53,206 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-21 01:42:53,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:53,238 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-07-21 01:42:53,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 01:42:53,240 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 01:42:53,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:53,251 INFO L225 Difference]: With dead ends: 31 [2020-07-21 01:42:53,251 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 01:42:53,257 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 01:42:53,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 01:42:53,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 01:42:53,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 01:42:53,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-07-21 01:42:53,312 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-07-21 01:42:53,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:53,313 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-07-21 01:42:53,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 01:42:53,313 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-07-21 01:42:53,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 01:42:53,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:53,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:53,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:53,530 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:53,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:53,531 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2020-07-21 01:42:53,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:53,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418555658] [2020-07-21 01:42:53,532 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 01:42:53,572 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:42:53,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:53,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:42:53,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:53,660 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 01:42:53,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:42:53,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418555658] [2020-07-21 01:42:53,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:42:53,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 01:42:53,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446906872] [2020-07-21 01:42:53,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 01:42:53,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:53,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 01:42:53,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 01:42:53,666 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-07-21 01:42:53,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:53,732 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-07-21 01:42:53,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 01:42:53,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 01:42:53,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:53,733 INFO L225 Difference]: With dead ends: 23 [2020-07-21 01:42:53,734 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 01:42:53,736 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 01:42:53,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 01:42:53,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 01:42:53,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 01:42:53,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-07-21 01:42:53,744 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2020-07-21 01:42:53,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:53,744 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-07-21 01:42:53,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 01:42:53,744 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-07-21 01:42:53,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 01:42:53,745 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:53,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:53,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:53,961 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:53,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:53,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2020-07-21 01:42:53,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:53,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786296464] [2020-07-21 01:42:53,964 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 01:42:54,012 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:42:54,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:54,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 01:42:54,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:54,175 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:42:54,216 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 01:42:54,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:42:54,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:42:54,458 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 01:42:54,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786296464] [2020-07-21 01:42:54,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:42:54,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 01:42:54,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944162802] [2020-07-21 01:42:54,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 01:42:54,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:54,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 01:42:54,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-07-21 01:42:54,463 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 14 states. [2020-07-21 01:42:54,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:54,890 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-07-21 01:42:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 01:42:54,891 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2020-07-21 01:42:54,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:54,893 INFO L225 Difference]: With dead ends: 39 [2020-07-21 01:42:54,894 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 01:42:54,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-07-21 01:42:54,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 01:42:54,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2020-07-21 01:42:54,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 01:42:54,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-21 01:42:54,903 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2020-07-21 01:42:54,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:54,903 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-21 01:42:54,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 01:42:54,904 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-21 01:42:54,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 01:42:54,905 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:54,905 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:55,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:55,123 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:55,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:55,124 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2020-07-21 01:42:55,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:55,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529286229] [2020-07-21 01:42:55,125 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) [2020-07-21 01:42:55,154 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:55,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:55,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:42:55,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:55,175 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 01:42:55,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:42:55,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529286229] [2020-07-21 01:42:55,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:42:55,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:42:55,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301827263] [2020-07-21 01:42:55,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:42:55,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:55,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:42:55,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:42:55,179 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2020-07-21 01:42:55,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:55,218 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-07-21 01:42:55,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:42:55,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 01:42:55,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:55,220 INFO L225 Difference]: With dead ends: 36 [2020-07-21 01:42:55,221 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 01:42:55,221 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 01:42:55,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 01:42:55,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-21 01:42:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-21 01:42:55,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-07-21 01:42:55,228 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2020-07-21 01:42:55,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:55,228 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-07-21 01:42:55,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:42:55,228 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-07-21 01:42:55,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 01:42:55,229 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:55,230 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:55,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:55,432 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:55,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:55,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2020-07-21 01:42:55,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:55,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458218973] [2020-07-21 01:42:55,434 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 01:42:55,463 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:42:55,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:55,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 01:42:55,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:55,517 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 01:42:55,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:42:55,589 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 01:42:55,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458218973] [2020-07-21 01:42:55,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:42:55,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 01:42:55,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774524225] [2020-07-21 01:42:55,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 01:42:55,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:55,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 01:42:55,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:42:55,594 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2020-07-21 01:42:55,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:55,677 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-07-21 01:42:55,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 01:42:55,678 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-07-21 01:42:55,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:55,679 INFO L225 Difference]: With dead ends: 36 [2020-07-21 01:42:55,679 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 01:42:55,680 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 01:42:55,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 01:42:55,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-07-21 01:42:55,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-21 01:42:55,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-21 01:42:55,693 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2020-07-21 01:42:55,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:55,694 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-21 01:42:55,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 01:42:55,699 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-21 01:42:55,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 01:42:55,700 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:55,702 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:55,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:55,903 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:55,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:55,904 INFO L82 PathProgramCache]: Analyzing trace with hash -971600090, now seen corresponding path program 2 times [2020-07-21 01:42:55,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:55,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822578665] [2020-07-21 01:42:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 01:42:55,941 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:42:55,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:55,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 01:42:55,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:56,096 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 01:42:56,134 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 01:42:56,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:42:56,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:42:56,636 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 01:42:56,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822578665] [2020-07-21 01:42:56,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:42:56,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-07-21 01:42:56,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577275894] [2020-07-21 01:42:56,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 01:42:56,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:56,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 01:42:56,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-07-21 01:42:56,640 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 22 states. [2020-07-21 01:42:57,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:57,761 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-07-21 01:42:57,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 01:42:57,765 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2020-07-21 01:42:57,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:57,769 INFO L225 Difference]: With dead ends: 44 [2020-07-21 01:42:57,769 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 01:42:57,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 01:42:57,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 01:42:57,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-07-21 01:42:57,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 01:42:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-07-21 01:42:57,793 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-07-21 01:42:57,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:57,793 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-07-21 01:42:57,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 01:42:57,793 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-07-21 01:42:57,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 01:42:57,795 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:57,795 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:57,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:57,999 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:57,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:57,999 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 3 times [2020-07-21 01:42:58,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:58,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187251056] [2020-07-21 01:42:58,001 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 01:42:58,029 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:42:58,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:42:58,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 01:42:58,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:42:58,128 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 01:42:58,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:42:58,263 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 01:42:58,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187251056] [2020-07-21 01:42:58,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:42:58,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-07-21 01:42:58,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899315973] [2020-07-21 01:42:58,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 01:42:58,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:42:58,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 01:42:58,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2020-07-21 01:42:58,266 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 16 states. [2020-07-21 01:42:58,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:42:58,343 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-07-21 01:42:58,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 01:42:58,353 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2020-07-21 01:42:58,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:42:58,354 INFO L225 Difference]: With dead ends: 46 [2020-07-21 01:42:58,354 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 01:42:58,355 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 01:42:58,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 01:42:58,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-07-21 01:42:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 01:42:58,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-07-21 01:42:58,363 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 26 [2020-07-21 01:42:58,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:42:58,364 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-07-21 01:42:58,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 01:42:58,364 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-07-21 01:42:58,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 01:42:58,365 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:42:58,365 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:42:58,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:58,570 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:42:58,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:42:58,570 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 4 times [2020-07-21 01:42:58,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:42:58,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241112440] [2020-07-21 01:42:58,572 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 01:42:58,608 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:42:58,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 01:42:58,609 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:42:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 01:42:58,623 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:42:58,647 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 01:42:58,648 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 01:42:58,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:42:58,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:42:58 BoogieIcfgContainer [2020-07-21 01:42:58,906 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:42:58,910 INFO L168 Benchmark]: Toolchain (without parser) took 6899.84 ms. Allocated memory was 145.2 MB in the beginning and 248.0 MB in the end (delta: 102.8 MB). Free memory was 103.2 MB in the beginning and 196.2 MB in the end (delta: -93.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-21 01:42:58,911 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 01:42:58,912 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.17 ms. Allocated memory is still 145.2 MB. Free memory was 102.7 MB in the beginning and 93.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-21 01:42:58,913 INFO L168 Benchmark]: Boogie Preprocessor took 43.95 ms. Allocated memory is still 145.2 MB. Free memory was 93.4 MB in the beginning and 92.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:42:58,914 INFO L168 Benchmark]: RCFGBuilder took 461.74 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 91.9 MB in the beginning and 169.7 MB in the end (delta: -77.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 01:42:58,916 INFO L168 Benchmark]: TraceAbstraction took 6060.62 ms. Allocated memory was 202.9 MB in the beginning and 248.0 MB in the end (delta: 45.1 MB). Free memory was 169.7 MB in the beginning and 196.2 MB in the end (delta: -26.6 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. [2020-07-21 01:42:58,921 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 325.17 ms. Allocated memory is still 145.2 MB. Free memory was 102.7 MB in the beginning and 93.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.95 ms. Allocated memory is still 145.2 MB. Free memory was 93.4 MB in the beginning and 92.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 461.74 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 91.9 MB in the beginning and 169.7 MB in the end (delta: -77.8 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6060.62 ms. Allocated memory was 202.9 MB in the beginning and 248.0 MB in the end (delta: 45.1 MB). Free memory was 169.7 MB in the beginning and 196.2 MB in the end (delta: -26.6 MB). Peak memory consumption was 18.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, j=10, n=6, n=0] [L13] COND TRUE i<=n VAL [i=1, j=10, n=6, n=0] [L14] COND TRUE i