/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/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:10:41,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:10:41,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:10:41,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:10:41,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:10:41,105 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:10:41,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:10:41,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:10:41,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:10:41,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:10:41,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:10:41,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:10:41,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:10:41,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:10:41,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:10:41,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:10:41,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:10:41,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:10:41,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:10:41,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:10:41,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:10:41,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:10:41,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:10:41,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:10:41,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:10:41,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:10:41,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:10:41,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:10:41,146 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 23:10:41,161 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:10:41,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:10:41,162 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:10:41,162 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:10:41,163 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:10:41,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:10:41,163 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:10:41,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:10:41,163 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:10:41,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:10:41,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:10:41,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:10:41,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:10:41,164 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:10:41,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:10:41,165 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:10:41,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:10:41,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:10:41,165 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:10:41,166 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:10:41,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:10:41,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:10:41,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:10:41,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:10:41,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:10:41,167 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:10:41,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:41,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:10:41,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:10:41,167 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 23:10:41,459 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:10:41,472 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:10:41,475 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:10:41,477 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:10:41,477 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:10:41,478 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-07-21 23:10:41,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a26390872/a28ee68480b346f38e95fcf2e98b40f5/FLAGf9d351e61 [2020-07-21 23:10:41,955 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:10:41,956 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-07-21 23:10:41,962 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a26390872/a28ee68480b346f38e95fcf2e98b40f5/FLAGf9d351e61 [2020-07-21 23:10:42,369 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a26390872/a28ee68480b346f38e95fcf2e98b40f5 [2020-07-21 23:10:42,379 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:10:42,383 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:10:42,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:10:42,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:10:42,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:10:42,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:10:42" (1/1) ... [2020-07-21 23:10:42,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fca7f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:42, skipping insertion in model container [2020-07-21 23:10:42,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:10:42" (1/1) ... [2020-07-21 23:10:42,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:10:42,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:10:42,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:10:42,650 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:10:42,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:10:42,688 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:10:42,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:42 WrapperNode [2020-07-21 23:10:42,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:10:42,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:10:42,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:10:42,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:10:42,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:42" (1/1) ... [2020-07-21 23:10:42,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:42" (1/1) ... [2020-07-21 23:10:42,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:42" (1/1) ... [2020-07-21 23:10:42,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:42" (1/1) ... [2020-07-21 23:10:42,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:42" (1/1) ... [2020-07-21 23:10:42,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:42" (1/1) ... [2020-07-21 23:10:42,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:42" (1/1) ... [2020-07-21 23:10:42,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:10:42,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:10:42,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:10:42,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:10:42,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:42" (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 23:10:42,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:10:42,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:10:42,910 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:10:42,910 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:10:42,910 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:10:42,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:10:42,911 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:10:42,911 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:10:42,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:10:42,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:10:42,911 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:10:42,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:10:42,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:10:43,101 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:10:43,101 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 23:10:43,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:10:43 BoogieIcfgContainer [2020-07-21 23:10:43,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:10:43,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:10:43,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:10:43,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:10:43,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:10:42" (1/3) ... [2020-07-21 23:10:43,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d18d9e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:10:43, skipping insertion in model container [2020-07-21 23:10:43,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:10:42" (2/3) ... [2020-07-21 23:10:43,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d18d9e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:10:43, skipping insertion in model container [2020-07-21 23:10:43,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:10:43" (3/3) ... [2020-07-21 23:10:43,113 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2020-07-21 23:10:43,123 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:10:43,130 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:10:43,144 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:10:43,171 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:10:43,171 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:10:43,171 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:10:43,171 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:10:43,171 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:10:43,172 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:10:43,172 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:10:43,172 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:10:43,191 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-21 23:10:43,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 23:10:43,198 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:43,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:43,199 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:43,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:43,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1474053726, now seen corresponding path program 1 times [2020-07-21 23:10:43,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:43,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492371269] [2020-07-21 23:10:43,216 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 23:10:43,289 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:10:43,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:10:43,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 23:10:43,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:10:43,325 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 23:10:43,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:10:43,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492371269] [2020-07-21 23:10:43,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:10:43,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 23:10:43,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610447885] [2020-07-21 23:10:43,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 23:10:43,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:43,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 23:10:43,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:10:43,360 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-07-21 23:10:43,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:43,392 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2020-07-21 23:10:43,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 23:10:43,394 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-21 23:10:43,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:43,405 INFO L225 Difference]: With dead ends: 40 [2020-07-21 23:10:43,405 INFO L226 Difference]: Without dead ends: 19 [2020-07-21 23:10:43,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 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 23:10:43,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-21 23:10:43,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-21 23:10:43,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-21 23:10:43,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-07-21 23:10:43,456 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2020-07-21 23:10:43,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:43,457 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-07-21 23:10:43,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 23:10:43,457 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-07-21 23:10:43,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 23:10:43,458 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:43,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:43,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:43,674 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:43,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:43,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1462047953, now seen corresponding path program 1 times [2020-07-21 23:10:43,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:43,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006590119] [2020-07-21 23:10:43,676 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 23:10:43,713 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:10:43,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:10:43,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:10:43,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:10:43,760 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 23:10:43,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:10:43,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006590119] [2020-07-21 23:10:43,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:10:43,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:10:43,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622905633] [2020-07-21 23:10:43,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:10:43,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:43,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:10:43,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:10:43,766 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 3 states. [2020-07-21 23:10:43,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:43,807 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-07-21 23:10:43,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:10:43,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-21 23:10:43,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:43,809 INFO L225 Difference]: With dead ends: 32 [2020-07-21 23:10:43,809 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 23:10:43,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 23:10:43,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 23:10:43,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-07-21 23:10:43,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 23:10:43,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-07-21 23:10:43,820 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2020-07-21 23:10:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:43,820 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-07-21 23:10:43,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:10:43,821 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-07-21 23:10:43,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 23:10:43,822 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:43,822 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:10:44,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:44,037 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:44,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:44,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1463775831, now seen corresponding path program 1 times [2020-07-21 23:10:44,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:44,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010717915] [2020-07-21 23:10:44,040 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 23:10:44,068 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:10:44,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:10:44,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 23:10:44,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:10:44,122 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 23:10:44,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:10:44,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010717915] [2020-07-21 23:10:44,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:10:44,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 23:10:44,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257392232] [2020-07-21 23:10:44,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 23:10:44,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:44,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 23:10:44,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:10:44,127 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-07-21 23:10:44,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:44,188 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-07-21 23:10:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 23:10:44,189 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-07-21 23:10:44,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:44,191 INFO L225 Difference]: With dead ends: 29 [2020-07-21 23:10:44,191 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 23:10:44,192 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 23:10:44,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 23:10:44,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-07-21 23:10:44,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 23:10:44,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-21 23:10:44,200 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 11 [2020-07-21 23:10:44,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:44,200 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-21 23:10:44,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 23:10:44,201 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-21 23:10:44,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 23:10:44,202 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:44,202 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 23:10:44,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:44,417 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:44,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:44,418 INFO L82 PathProgramCache]: Analyzing trace with hash -541842987, now seen corresponding path program 1 times [2020-07-21 23:10:44,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:44,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607588792] [2020-07-21 23:10:44,420 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) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:44,460 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:10:44,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:10:44,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 23:10:44,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:10:44,508 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:10:44,535 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 23:10:44,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:10:44,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607588792] [2020-07-21 23:10:44,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:10:44,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 23:10:44,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897269717] [2020-07-21 23:10:44,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 23:10:44,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:10:44,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 23:10:44,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:10:44,538 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2020-07-21 23:10:44,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:10:44,606 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-07-21 23:10:44,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:10:44,607 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-07-21 23:10:44,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:10:44,608 INFO L225 Difference]: With dead ends: 37 [2020-07-21 23:10:44,609 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 23:10:44,609 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 23:10:44,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 23:10:44,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-21 23:10:44,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 23:10:44,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-07-21 23:10:44,618 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 18 [2020-07-21 23:10:44,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:10:44,618 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-07-21 23:10:44,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 23:10:44,618 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-07-21 23:10:44,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 23:10:44,620 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:10:44,620 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 23:10:44,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:44,836 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:10:44,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:10:44,837 INFO L82 PathProgramCache]: Analyzing trace with hash 814692392, now seen corresponding path program 1 times [2020-07-21 23:10:44,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:10:44,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778793199] [2020-07-21 23:10:44,839 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 23:10:44,873 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:10:44,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 23:10:44,873 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 23:10:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 23:10:44,884 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 23:10:44,900 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 23:10:44,900 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 23:10:45,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:10:45,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:10:45 BoogieIcfgContainer [2020-07-21 23:10:45,136 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:10:45,139 INFO L168 Benchmark]: Toolchain (without parser) took 2757.67 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 101.8 MB in the beginning and 91.0 MB in the end (delta: 10.9 MB). Peak memory consumption was 75.3 MB. Max. memory is 7.1 GB. [2020-07-21 23:10:45,140 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 23:10:45,141 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.44 ms. Allocated memory is still 136.8 MB. Free memory was 101.6 MB in the beginning and 92.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 23:10:45,142 INFO L168 Benchmark]: Boogie Preprocessor took 144.86 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 92.0 MB in the beginning and 181.3 MB in the end (delta: -89.3 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. [2020-07-21 23:10:45,143 INFO L168 Benchmark]: RCFGBuilder took 269.20 ms. Allocated memory is still 201.3 MB. Free memory was 181.3 MB in the beginning and 166.7 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-07-21 23:10:45,144 INFO L168 Benchmark]: TraceAbstraction took 2030.70 ms. Allocated memory is still 201.3 MB. Free memory was 166.7 MB in the beginning and 91.0 MB in the end (delta: 75.7 MB). Peak memory consumption was 75.7 MB. Max. memory is 7.1 GB. [2020-07-21 23:10:45,148 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 306.44 ms. Allocated memory is still 136.8 MB. Free memory was 101.6 MB in the beginning and 92.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 144.86 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 92.0 MB in the beginning and 181.3 MB in the end (delta: -89.3 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 269.20 ms. Allocated memory is still 201.3 MB. Free memory was 181.3 MB in the beginning and 166.7 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2030.70 ms. Allocated memory is still 201.3 MB. Free memory was 166.7 MB in the beginning and 91.0 MB in the end (delta: 75.7 MB). Peak memory consumption was 75.7 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