/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:19:36,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:19:36,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:19:36,215 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:19:36,215 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:19:36,217 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:19:36,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:19:36,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:19:36,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:19:36,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:19:36,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:19:36,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:19:36,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:19:36,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:19:36,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:19:36,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:19:36,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:19:36,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:19:36,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:19:36,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:19:36,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:19:36,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:19:36,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:19:36,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:19:36,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:19:36,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:19:36,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:19:36,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:19:36,265 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 20:19:36,295 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:19:36,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:19:36,298 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:19:36,299 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:19:36,299 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:19:36,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:19:36,300 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:19:36,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:19:36,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:19:36,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:19:36,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:19:36,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:19:36,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:19:36,304 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:19:36,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:19:36,304 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:19:36,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:19:36,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:19:36,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:19:36,305 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:19:36,306 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:19:36,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:19:36,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:19:36,307 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:19:36,307 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:19:36,307 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:19:36,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:36,308 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:19:36,308 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:19:36,308 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 20:19:36,692 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:19:36,706 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:19:36,710 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:19:36,712 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:19:36,712 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:19:36,713 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-07-21 20:19:36,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fc6a7845/c8238c9f69ce4210a5f84dfdf38d141a/FLAGb4f6750a4 [2020-07-21 20:19:37,318 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:19:37,319 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-07-21 20:19:37,327 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fc6a7845/c8238c9f69ce4210a5f84dfdf38d141a/FLAGb4f6750a4 [2020-07-21 20:19:37,626 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fc6a7845/c8238c9f69ce4210a5f84dfdf38d141a [2020-07-21 20:19:37,637 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:19:37,639 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:19:37,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:19:37,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:19:37,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:19:37,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:19:37" (1/1) ... [2020-07-21 20:19:37,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8ddc12d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:37, skipping insertion in model container [2020-07-21 20:19:37,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:19:37" (1/1) ... [2020-07-21 20:19:37,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:19:37,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:19:37,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:19:37,907 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:19:37,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:19:37,942 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:19:37,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:37 WrapperNode [2020-07-21 20:19:37,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:19:37,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:19:37,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:19:37,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:19:37,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:37" (1/1) ... [2020-07-21 20:19:37,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:37" (1/1) ... [2020-07-21 20:19:37,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:37" (1/1) ... [2020-07-21 20:19:37,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:37" (1/1) ... [2020-07-21 20:19:37,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:37" (1/1) ... [2020-07-21 20:19:37,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:37" (1/1) ... [2020-07-21 20:19:37,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:37" (1/1) ... [2020-07-21 20:19:37,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:19:37,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:19:37,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:19:37,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:19:37,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:19:38,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:19:38,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:19:38,156 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 20:19:38,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:19:38,156 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:19:38,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:19:38,157 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:19:38,157 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 20:19:38,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:19:38,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:19:38,158 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:19:38,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:19:38,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:19:38,427 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:19:38,428 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 20:19:38,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:19:38 BoogieIcfgContainer [2020-07-21 20:19:38,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:19:38,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:19:38,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:19:38,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:19:38,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:19:37" (1/3) ... [2020-07-21 20:19:38,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560e825a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:19:38, skipping insertion in model container [2020-07-21 20:19:38,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:19:37" (2/3) ... [2020-07-21 20:19:38,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560e825a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:19:38, skipping insertion in model container [2020-07-21 20:19:38,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:19:38" (3/3) ... [2020-07-21 20:19:38,455 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2020-07-21 20:19:38,473 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:19:38,487 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:19:38,514 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:19:38,556 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:19:38,557 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:19:38,557 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:19:38,557 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:19:38,559 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:19:38,559 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:19:38,559 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:19:38,559 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:19:38,585 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-21 20:19:38,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 20:19:38,594 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:38,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:19:38,597 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:38,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:38,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1474053726, now seen corresponding path program 1 times [2020-07-21 20:19:38,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:38,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29113222] [2020-07-21 20:19:38,629 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:38,708 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:19:38,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:19:38,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 20:19:38,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:19:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:19:38,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:19:38,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29113222] [2020-07-21 20:19:38,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:19:38,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 20:19:38,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706107506] [2020-07-21 20:19:38,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:19:38,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:19:38,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:19:38,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:19:38,846 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-07-21 20:19:38,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:19:38,960 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2020-07-21 20:19:38,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:19:38,963 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-21 20:19:38,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:19:38,973 INFO L225 Difference]: With dead ends: 48 [2020-07-21 20:19:38,974 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 20:19:38,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:19:39,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 20:19:39,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 20:19:39,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 20:19:39,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-07-21 20:19:39,032 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2020-07-21 20:19:39,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:19:39,033 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-07-21 20:19:39,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:19:39,033 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-07-21 20:19:39,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 20:19:39,034 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:39,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:19:39,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:39,249 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:39,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:39,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1463775831, now seen corresponding path program 1 times [2020-07-21 20:19:39,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:39,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272783310] [2020-07-21 20:19:39,251 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:39,278 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:19:39,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:19:39,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 20:19:39,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:19:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:19:39,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:19:39,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272783310] [2020-07-21 20:19:39,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:19:39,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 20:19:39,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2696407] [2020-07-21 20:19:39,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 20:19:39,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:19:39,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 20:19:39,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 20:19:39,335 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-07-21 20:19:39,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:19:39,406 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-07-21 20:19:39,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 20:19:39,407 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-07-21 20:19:39,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:19:39,409 INFO L225 Difference]: With dead ends: 29 [2020-07-21 20:19:39,410 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 20:19:39,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 20:19:39,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 20:19:39,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-07-21 20:19:39,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 20:19:39,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-21 20:19:39,423 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 11 [2020-07-21 20:19:39,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:19:39,423 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-21 20:19:39,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 20:19:39,424 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-21 20:19:39,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 20:19:39,425 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:39,425 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:19:39,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:39,642 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:39,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:39,643 INFO L82 PathProgramCache]: Analyzing trace with hash -541842987, now seen corresponding path program 1 times [2020-07-21 20:19:39,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:39,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935049815] [2020-07-21 20:19:39,645 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:39,687 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:19:39,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:19:39,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 20:19:39,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:19:39,751 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:19:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:19:39,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:19:39,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935049815] [2020-07-21 20:19:39,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:19:39,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 20:19:39,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725372736] [2020-07-21 20:19:39,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 20:19:39,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:19:39,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 20:19:39,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 20:19:39,816 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2020-07-21 20:19:39,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:19:39,965 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-07-21 20:19:39,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 20:19:39,967 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-07-21 20:19:39,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:19:39,968 INFO L225 Difference]: With dead ends: 37 [2020-07-21 20:19:39,969 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 20:19:39,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-21 20:19:39,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 20:19:39,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-21 20:19:39,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 20:19:39,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-07-21 20:19:39,999 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 18 [2020-07-21 20:19:40,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:19:40,001 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-07-21 20:19:40,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 20:19:40,002 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-07-21 20:19:40,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 20:19:40,004 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:19:40,005 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:19:40,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:40,219 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:19:40,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:19:40,220 INFO L82 PathProgramCache]: Analyzing trace with hash 814692392, now seen corresponding path program 1 times [2020-07-21 20:19:40,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:19:40,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837560799] [2020-07-21 20:19:40,222 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:40,274 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:19:40,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 20:19:40,275 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:19:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 20:19:40,297 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:19:40,340 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 20:19:40,340 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 20:19:40,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:19:40,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:19:40 BoogieIcfgContainer [2020-07-21 20:19:40,574 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:19:40,578 INFO L168 Benchmark]: Toolchain (without parser) took 2938.66 ms. Allocated memory was 142.1 MB in the beginning and 200.3 MB in the end (delta: 58.2 MB). Free memory was 100.1 MB in the beginning and 92.9 MB in the end (delta: 7.1 MB). Peak memory consumption was 65.3 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:40,579 INFO L168 Benchmark]: CDTParser took 1.06 ms. Allocated memory is still 142.1 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 20:19:40,580 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.03 ms. Allocated memory is still 142.1 MB. Free memory was 99.6 MB in the beginning and 90.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:40,582 INFO L168 Benchmark]: Boogie Preprocessor took 39.59 ms. Allocated memory is still 142.1 MB. Free memory was 90.2 MB in the beginning and 88.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:40,583 INFO L168 Benchmark]: RCFGBuilder took 453.87 ms. Allocated memory was 142.1 MB in the beginning and 200.3 MB in the end (delta: 58.2 MB). Free memory was 88.7 MB in the beginning and 166.0 MB in the end (delta: -77.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:40,584 INFO L168 Benchmark]: TraceAbstraction took 2133.70 ms. Allocated memory is still 200.3 MB. Free memory was 165.3 MB in the beginning and 92.9 MB in the end (delta: 72.4 MB). Peak memory consumption was 72.4 MB. Max. memory is 7.1 GB. [2020-07-21 20:19:40,591 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.06 ms. Allocated memory is still 142.1 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 302.03 ms. Allocated memory is still 142.1 MB. Free memory was 99.6 MB in the beginning and 90.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.59 ms. Allocated memory is still 142.1 MB. Free memory was 90.2 MB in the beginning and 88.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 453.87 ms. Allocated memory was 142.1 MB in the beginning and 200.3 MB in the end (delta: 58.2 MB). Free memory was 88.7 MB in the beginning and 166.0 MB in the end (delta: -77.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2133.70 ms. Allocated memory is still 200.3 MB. Free memory was 165.3 MB in the beginning and 92.9 MB in the end (delta: 72.4 MB). Peak memory consumption was 72.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int i=0, x=0, y=0; [L18] int n=__VERIFIER_nondet_int(); [L19] COND FALSE !(!(n>0)) [L20] i=0 VAL [i=0, n=1, x=0, y=0] [L20] COND TRUE i